US20050003297A1 - Laser engraving methods and compositions, and articles having laser engraving thereon - Google Patents

Laser engraving methods and compositions, and articles having laser engraving thereon Download PDF

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Publication number
US20050003297A1
US20050003297A1 US10/803,538 US80353804A US2005003297A1 US 20050003297 A1 US20050003297 A1 US 20050003297A1 US 80353804 A US80353804 A US 80353804A US 2005003297 A1 US2005003297 A1 US 2005003297A1
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Prior art keywords
laser
layer
enhancing additive
composition
laminate
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US10/803,538
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Brian Labrec
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L 1 Secure Credentialing LLC
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Digimarc Corp
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Priority to US10/803,538 priority Critical patent/US20050003297A1/en
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Publication of US20050003297A1 publication Critical patent/US20050003297A1/en
Assigned to L-1 SECURE CREDENTIALING, INC. reassignment L-1 SECURE CREDENTIALING, INC. MERGER/CHANGE OF NAME Assignors: DIGIMARC CORPORATION
Assigned to BANK OF AMERICA, N.A. reassignment BANK OF AMERICA, N.A. NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Assignors: L-1 SECURE CREDENTIALING, INC.
Abandoned legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24Ablative recording, e.g. by burning marks; Spark recording
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14Security printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267Marking of plastic artifacts, e.g. with laser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/405Marking
    • B42D25/41Marking using electromagnetic radiation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/16Halogen-containing compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/30Sulfur-, selenium- or tellurium-containing compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41MPRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M7/00After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
    • B41M7/0027After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or layers by lamination or by fusion of the coatings or layers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146Laser beam
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the invention generally relates to methods and compositions for laser marking or engraving that contain one or more laser enhancing additives, as well as methods for conveying information, images, and security features on data carriers through laser engraving and marking, including laser engraving and marking using such compositions.
  • ID documents play a critical role in today's society.
  • An ID document is an identification card (“ID card”).
  • ID documents are used on a daily basis—to prove identity, to verify age, to access a secure area, to evidence driving privileges, to cash a check, and so on. Airplane passengers are required to show an ID document during check in, security screening, and prior to boarding their flight.
  • ID documents are used to make payments, access an ATM, debit an account, or make a payment, etc.
  • identification cards and documents such as driving licenses, national or government identification cards, bank cards, credit cards, controlled access cards and smart cards, carry thereon certain items of information which relate to the identity of the bearer. Examples of such information include name, address, birth date, signature and photographic image; the cards or documents may in addition carry other variant data (i.e., data specific to a particular card or document, for example an employee number) and invariant data (i.e., data common to a large number of cards, for example the name of an employer). All of the cards described above will hereinafter be generically referred to as “ID documents”.
  • ID documents All of the cards described above will hereinafter be generically referred to as “ID documents”.
  • a document such as an ID card, drivers license, passport or the like
  • data or indicia representative of the document issuer e.g., an official seal, or the name or mark of a company or educational institution
  • data or indicia representative of the document bearer e.g., a photographic likeness, name or address
  • a pattern, logo or other distinctive marking representative of the document issuer will serve as a means of verifying the authenticity, genuineness or valid issuance of the document.
  • a photographic likeness or other data or indicia personal to the bearer will validate the right of access to certain facilities or the prior authorization to engage in commercial transactions and activities.
  • Identification documents such as ID cards, having printed background security patterns, designs or logos and identification data personal to the card bearer have been known and are described, for example, in U.S. Pat. No. 3,758,970, issued Sep. 18, 1973 to M. Annenberg; in Great Britain Pat. No. 1,472,581, issued to G. A. O. Deutschen Fur Automation Und Organisation mbH, published Mar. 10, 1976; in International Patent Application PCT/GB82/00150, published Nov. 25, 1982 as Publication No. WO 82/04149; in U.S. Pat. No. 4,653,775, issued Mar. 31, 1987 to T. Raphael, et al.; in U.S. Pat. No. 4,738,949, issued Apr. 19, 1988 to G. S. Sethi, et al.; and in U.S. Pat. No. 5,261,987, issued Nov. 16 1993 to J. W. Luening, et al. All of the aforementioned documents are hereby incorporated by reference.
  • the donor sheets are brought into contact with an image-receiving element (which can, for example, be a substrate) which has a layer for receiving the dyes transferred imagewise from the donor sheets.
  • image-receiving element which can, for example, be a substrate
  • Thermal dye transfer methods as aforesaid are known and described, for example, in U.S. Pat. No. 4,621,271, issued Nov. 4, 1986 to S. Brownstein and U.S. Pat. No. 5,024,989, issued Jun. 18, 1991 to Y. H. Chiang, et al. Each of these patents is hereby incorporated by reference.
  • ID documents are of two main types, namely so-called “central” issue (CI), and so-called “on-the-spot” or “over-the-counter” (OTC) issue.
  • CI central issue
  • OTC over-the-counter
  • CI type ID documents are not immediately provided to the bearer, but are later issued to the bearer from a central location.
  • a bearer reports to a document station where data is collected, the data are forwarded to a central location where the card is produced, and the card is forwarded to the bearer, often by mail.
  • Another illustrative example of a CI assembling process occurs in a setting where a driver passes a driving test, but then receives her license in the mail from a CI facility a short time later.
  • Still another illustrative example of a CI assembling process occurs in a setting where a driver renews her license by mail or over the Internet, then receives a drivers license card through the mail.
  • Centrally issued identification documents can be produced from digitally stored information and generally comprise an opaque core material (also referred to as “substrate”), such as paper or plastic, sandwiched between two layers of clear plastic laminate, such as polyester, to protect the aforementioned items of information from wear, exposure to the elements and tampering.
  • the materials used in such CI identification documents can offer the ultimate in durability.
  • centrally issued digital identification documents generally offer a higher level of security than OTC identification documents because they offer the ability to pre-print the core of the central issue document with security features such as “micro-printing”, ultra-violet security features, security indicia and other features currently unique to centrally issued identification documents.
  • security features and/or secured materials used to make those features are centrally located, reducing the chances of loss or theft (as compared to having secured materials dispersed over a wide number of “on the spot” locations).
  • a CI assembling process can be more of a bulk process facility, in which many cards are produced in a centralized facility, one after another.
  • the CI facility may, for example, process thousands of cards in a continuous manner. Because the processing occurs in bulk, CI can have an increase in efficiency as compared to some OTC processes, especially those OTC processes that run intermittently. Thus, CI processes can sometimes have a lower cost per ID document, if a large volume of ID documents are manufactured.
  • OTC identification documents are issued immediately to a bearer who is present at a document-issuing station.
  • An OTC assembling process provides an ID document “on-the-spot”.
  • An illustrative example of an OTC assembling process is a Department of Motor Vehicles (“DMV”) setting where a driver's license is issued to person, on the spot, after a successful exam.).
  • DMV Department of Motor Vehicles
  • the very nature of the OTC assembling process results in small, sometimes compact, printing and card assemblers for printing the ID document.
  • OTC identification documents of the types mentioned above can take a number of forms, depending on cost and desired features.
  • Some OTC ID documents comprise highly plasticized polyvinyl chloride (PVC) or have a composite structure with polyester laminated to 0.5-2.0 mil (13-51 .mu.m) PVC film, which provides a suitable receiving layer for heat transferable dyes which form a photographic image, together with any variant or invariant data required for the identification of the bearer.
  • PVC polyvinyl chloride
  • FIGS. 1 and 2 illustrate a front view and cross-sectional view (taken along the A-A line), respectively, of an exemplary prior art identification (ID) document 10 .
  • the prior art ID document 1 includes a photographic image 12 , a bar code 14 (which may contain information specific to the person whose image appears in photographic image 12 and/or information that is the same from ID document to ID document), variable personal information 16 , such as an address, signature, and/or birthdate, and biometric information 18 associated with the person whose image appears in photographic image 12 (e.g., a fingerprint).
  • a bar code 14 which may contain information specific to the person whose image appears in photographic image 12 and/or information that is the same from ID document to ID document
  • variable personal information 16 such as an address, signature, and/or birthdate
  • biometric information 18 associated with the person whose image appears in photographic image 12 (e.g., a fingerprint).
  • the ID document 10 can include a magnetic stripe (which, for example, can be on the rear side (not shown) of the ID document 10 ), and various security features, such as a security pattern (for example, a printed pattern comprising a tightly printed pattern of finely divided printed and unprinted areas in close proximity to each other, such as a fine-line printed security pattern as is used in the printing of banknote paper, stock certificates, and the like).
  • a security pattern for example, a printed pattern comprising a tightly printed pattern of finely divided printed and unprinted areas in close proximity to each other, such as a fine-line printed security pattern as is used in the printing of banknote paper, stock certificates, and the like.
  • the ID document 10 comprises a pre-printed core 20 (such as, for example, white PVC material) that is, for example, about 25 mil thick.
  • the core 20 is laminated with a transparent material, such as clear PVC material 22 , which, by way of example, can be about 1-5 mil thick.
  • the composite of the core 20 and clear PVC material 22 form a so-called “card blank” 25 that can be up to about 30 mils thick.
  • Information 26 a - c is printed on the card blank 25 using a method such as Dye Diffusion Thermal Transfer (“D2T2”) printing (described further in commonly assigned U.S. Pat. No.
  • D2T2 Dye Diffusion Thermal Transfer
  • the information 26 a - c can, for example, comprise an indicium or indicia, such as the invariant or nonvarying information common to a large number of identification documents, for example the name and logo of the organization issuing the documents.
  • the information 26 a - c may be formed by any known process capable of forming the indicium on the specific core material used.
  • an additional layer of overlaminate 24 can be coupled to the card blank 25 and printing 26 a - c using, for example, 1 mil of adhesive (not shown).
  • the overlaminate 24 can be substantially transparent. Materials suitable for forming such protective layers are known to those skilled in the art of making identification documents and any of the conventional materials may be used provided they have sufficient transparency. Examples of usable materials for overlaminates include biaxially oriented polyester or other optically clear durable plastic film.
  • Laser beams for example can be used for marking, writing, bar coding, and engraving many different types of materials, including plastics. Lasers have been used, for example, to mark plastic materials to create indicia such as bar codes, date codes, part numbers, batch codes, and company logos. It will be appreciated that laser engraving or marking generally involves a process of inscribing or engraving a document surface with identification marks, characters, text, tactile marks—including text, patterns, designs (such as decorative or security features), photographs, etc.
  • thermoplastic materials One way to laser mark thermoplastic materials involves irradiating a material, such as a thermoplastic, with a laser beam at a given radiation.
  • the area irradiated by the laser absorbs the laser energy and produces heat which causes a visible discoloration in the thermoplastic.
  • the visible discoloration serves as a “mark” or indicator; it will be appreciated that laser beams can be controlled to form patterns of “marks” that can form images, lines, numbers, letters, patterns, and the like.
  • various types of marks e.g., dark marks on light backgrounds, light marks on dark backgrounds, colored marks
  • various types of marks e.g., dark marks on light backgrounds, light marks on dark backgrounds, colored marks
  • thermoplastics such as polyvinylchloride (PVC), acrylonitrile butadiene styrene (ABS), and polyethylene terephthalate (PET), are capable of absorbing laser energy in their native states.
  • PVC polyvinylchloride
  • ABS acrylonitrile butadiene styrene
  • PET polyethylene terephthalate
  • the foaming of the thermoplastic that can occur with some types of laser engraving can be adapted to provide an indicium having a tactile feel, which is a useful authenticator of a data carrier that also can be very difficult to counterfeit or alter.
  • laser engraving generally does not require the use of ink, which can reduce the cost of consumables used to manufacture an ID card.
  • Laser engraving can also be more durable than ink printing, and more resistant to abrasion (which can be particularly useful if a counterfeiter attempts to “rub off” an indicium on an ID card).
  • the resolution and print quality of laser engraving often can be higher than that of conventional ink-based printing.
  • Laser engraving also can be a more environmentally friendly manufacturing process than printing with ink, especially because solvents and other chemicals often used with ink generally are not used with laser engraving.
  • the inventor of the instant application has found that laser engraving of some types of materials, including materials that are not easily engraved (such as laminated TESLIN core ID documents), can be improved by increasing the sensitivity to laser radiation of a laminate used with the material and/or increasing the sensitivity to laser radiation of a coating applied to the material.
  • inventive laser enhancing additives improves the material being laser marked or laser engraved by introducing inventive laser enhancing additives to the material.
  • the material can be a laminate, a coating, or an article having a laminate or coating formed thereon.
  • These additives facilitate material sensitivity, greatly improving the ability to laser engrave laminated ID documents.
  • these additives can also improve the performance of laser engraving even on even those structures (e.g., fused polycarbonate card structures, polyvinylchloride (PVC), polyethylene terephthalate (PET), and acrylonitrile butadiene styrene (ABS)) that can tend to be more easily engraved by laser energy.
  • structures e.g., fused polycarbonate card structures, polyvinylchloride (PVC), polyethylene terephthalate (PET), and acrylonitrile butadiene styrene (ABS)
  • the processing time for polycarbonate ID card structures may be decreased.
  • user of the laser enhancing additives described herein may enable laser engraving to be accomplished using less laser energy and/or lower levels of laser energy than in known methods.
  • Another inventive technique disclosed herein improves the sensitivity of a material being laser engraved by applying a coating to the material, the coating containing at least one laser enhancing additive as described below.
  • the material can be part of virtually any type of article to be laser marked or laser engraved.
  • the material is a core layer in an identification document.
  • the additive used to enhance laser engraving comprises a mixture of either copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI) with at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO 2 Na or R—OSO 2 Na), and Thioester (e.g., substances containing —SH).
  • This additive can be added to a laminate layer (where the laminate layer itself is to be laser engraved or marked) and/or to a coating (where the surface being coated is to be laser engraved or marked).
  • the additive comprises an effective amount of copper potassium iodide and zinc sulfide in a host material.
  • the host material can, for example, be a laminate or a coating.
  • the host material also can be another material that is later added to a laminate or coating.
  • the host material can, for example, be a thermoplastic or thermoset.
  • the host material (as well as the laminate to which the host material may be added) generally can be any material whose laser engraving/marking properties are improved by the addition of the laser enhancing additive described herein, and it is expected that many materials developed in the future will be able to make use of the additive described herein.
  • the addition of the laser enhancing additive described herein enables the laminate to be laser engraved with a grayscale image.
  • the additive comprises an effective amount of copper potassium iodide and zinc sulfide in a liquid carrier material, which together form a coating that can be applied to an article to be laser engraved.
  • the liquid carrier material can be virtually any known material that can be used as a coating, including resins, polyesters, polycarbonates, vinyls, acrylates, urethanes, and cellulose-base coating.
  • the liquid carrier material is a material used for coating a surface of a core material (e.g., TESLIN, polycarbonate) of an identification document.
  • the surface being coated generally can be any material (including laminates) whose laser engraving properties are improved by the addition of a coating containing the laser enhancing additive described herein.
  • the addition of the inventive additive to a coating enables the surface to be capable of being engraved with a grayscale image.
  • the effective amount of the laser enhancing additive can vary depending on the tolerance for possible reduction in the transparency of the laminate or coating. In one embodiment, for transparent laminates or coating, the effective amount of the additive can range from 0.001% by weight up to about 0.1% by weight (based on the total weight of the material to which the additive is added.).
  • the effective amount of the additive can be higher than 1% (e.g., 1%-100%).
  • the effective amount of the additive for a given use can depend on a number of factors, including the properties of the laminate or coating, the type of laser engraving being performed (e.g., grayscale or non-grayscale), the type of laser used, the desired properties or features of the article or surface being engraved, etc.
  • the effective amount of the additive is about 0.06% by weight.
  • the constituents of the above-described additive can be present in two different layers through which a laser beam can pass.
  • the copper potassium iodide can be present in a first layer of laminate and the zinc sulfide can be present in a second layer of laminate, where the first and second layers are either adjacent or separated by one or more layers of material (e.g., another laminate or an adhesive) that is transparent to laser radiation.
  • the combined action of the copper potassium iodide and zinc sulfide enable laser engraving to occur in either or both of the layers.
  • an effective amount of copper potassium iodide can be present in a coating applied to an article and an effective amount of zinc sulfide can be present in a laminate applied over the coating.
  • the invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive.
  • the laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI), and a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
  • the first and second quantities are the same (for example, one part copper iodide and one part barium sulfide).
  • the first and second quantities are different (for example, three parts copper potassium iodide to one part zinc sulfide, or 2 parts copper iodide to 4 parts thioester).
  • the composition is markable by at least one of an excimer, Nd:YAG, and C0 2 laser (including both light pumped and diode pumped Nd:YAG lasers).
  • the laser enhancing additive is present in the composition in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the composition. In one embodiment, the laser enhancing additive is present in an amount between 0.1 percent and 100 percent by weight based on the total weight of the composition. In one embodiment, the laser enhancing additive is present in an amount that is about 0.06 percent by weight based on the total weight of the composition.
  • the laser enhancing additive comprises 0.03 percent by weight of at least one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI) and 0.03 percent by weight of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester, each weight based on the total weight of the composition.
  • CuKI 3 copper potassium iodide
  • CuI Copper Iodide
  • ZnS zinc sulfide
  • BaS barium sulfide
  • alkyl sulfonate alkyl sulfonate
  • thioester each weight based on the total weight of the composition.
  • the host material of the composition is be a material that is not sensitive and/or transparent to laser radiation, such as a material that, by itself, is unable to have acceptable gray scale images laser engraved onto it.
  • the host material can be a laminate or a coating.
  • the host material can comprise at least one of a thermosetting material, thermoplastic, polymer, copolymer, polycarbonate, fused polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polyvinyl chloride, polyethylene, thermoplastic resins, engineering thermoplastic, polyurethane, polyamide, polystyrene, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, high impact polystyrene, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprol
  • the invention provides an article of manufacture (such as an identification document) capable of being laser engraved with a grayscale image, comprising a core layer, a first layer and a second layer.
  • the core layer has a first surface.
  • the first layer comprises a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI).
  • the second layer comprises a second host material and is oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer.
  • the second host material comprises an effective amount of a second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
  • a second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
  • the first and second layers are operably coupled to each other and at least one of the first and second layers is operably coupled to the first surface of the core layer.
  • a grayscale image is laser engraved into at least one of the first and second layers.
  • first layer is substantially transparent and the first laser enhancing additive is present in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the first host material.
  • the second layer is substantially transparent, and the second laser enhancing additive is present in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the second host material.
  • a third layer is disposed between the first and second layers; the third layer comprises a material that permits transmission of a laser beam therethrough.
  • the invention provides a method of engraving a material by exposing the material to laser radiation.
  • An effective amount of a laser enhancing additive is added to the material.
  • the laser enhancing additive comprises at least one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI), and at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
  • the material is exposed to laser radiation in a manner that causes the material to be engraved by the laser radiation.
  • the effective amount of the laser enhancing additive comprises 0.01% to 0.1% by weight of the material, e.g. 0.06% by weight.
  • the effective amount of the laser enhancing additive comprises 0.1% to 100% by weight of the material.
  • an indicium is formed in grayscale in at least a portion of the material through the exposure of the portion of the material to laser radiation.
  • the laser engraved material is used in the manufacture of an identification document.
  • the invention provides a method of laser engraving a grayscale image on an article having first and second layers.
  • a first effective amount of least one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI) is added to the first layer.
  • a second effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester is added to the second layer.
  • a laser beam such as a beam from at least one of an Nd:Yag laser and a C0 2 laser, is directed so that it passes through at least a portion of the first layer and at least a portion of the second layer to form a grayscale image in at least one of the first and second layers.
  • the laser beam is directed so that it that it passes through at least a portion of the first layer and at least a portion of the second layer such that the first and second layers become affixed to each other.
  • the invention provides a multilayer identification document, comprising a core layer and a film layer.
  • the film layer overlays at least a portion of the core layer and is affixed to the portion of the core layer.
  • the film layer comprising an additive that comprises an effective amount of least one of copper potassium iodide (CuKI 3 ) or Copper Iodide (CuI), and an effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
  • the identification document bears a first indicium thereon, the indicia obtained by exposing the film layer to a laser beam.
  • the indicia comprises at least one of a gray scale image, photograph, text, tactile text, graphics, information, security pattern, security indicia, and a digital watermark.
  • the invention provides an identification document having improved laser engraving characteristics.
  • the identification document comprises a TESLIN core coated with a coating containing the laser enhancing additive described above.
  • a grayscale image representing variable data (e.g., personalized data) is laser engraved onto the TESLIN core using an Nd:YAG laser.
  • a laminate can be affixed to the TESLIN either before laser engraving or after laser engraving. If the laminate is applied before the TESLIN core is laser engraved, the laminate generally will be transparent to laser radiation.
  • At least some embodiments of our invention can overcome at least some of these and other limitations of the prior art. At least some embodiments of our invention offer a less expensive option for laser engraving with improved grayscale engraving, and ease of manufacture, without giving up desired security features.
  • FIG. 1 is an illustrative example of a prior art identification document
  • FIG. 2 is an illustrative cross section of the prior art identification document of FIG. 1 , taken along the A-A line;
  • FIG. 3 is an illustrative cross-sectional view of an identification document in accordance with a first embodiment of a first aspect of the invention
  • FIG. 4 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the first aspect of the invention.
  • FIG. 5 is an illustrative cross sectional view of an identification document in accordance with a third embodiment of the first aspect of the invention.
  • FIG. 6 is an illustrative cross sectional view of an identification document in accordance with a fourth embodiment of the first aspect of the invention.
  • FIG. 7 is an illustrative cross sectional view of an identification document in accordance with a first embodiment of a second aspect of the invention.
  • FIG. 8 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the second aspect of the invention.
  • laser engraved indicia, information, identification documents, data, etc. may be shown as having a particular cross sectional shape (e.g., rectangular) but that is provided by way of example and illustration only and is not limiting, nor is the shape intended to represent the actual resultant cross sectional shape that occurs during laser engraving or manufacturing of identification documents.
  • ID document is broadly defined and intended to include at least all types of ID documents, including (but are not limited to), documents, magnetic disks, credit cards, bank cards, phone cards, stored value cards, prepaid cards, smart cards (e.g., cards that include one more semiconductor chips, such as memory devices, microprocessors, and microcontrollers), contact cards, contactless cards, proximity cards (e.g., radio frequency (RFID) cards), passports, driver's licenses, network access cards, employee badges, debit cards, security cards, visas, immigration documentation, national ID cards, citizenship cards, social security cards and badges, certificates, identification cards or documents, voter registration and/or identification cards, police ID cards, border crossing cards, security clearance badges and cards, gun permits, badges, gift certificates or cards, membership cards or badges, tags, CD's, consumer products, knobs, keyboards, electronic components, etc., or any other suitable items or articles that may record information, images, and/or other data, which may be associated with a
  • RFID radio frequency
  • identification includes (but is not limited to) information, decoration, and any other purpose for which an indicia can be placed upon an article in the article's raw, partially prepared, or final state.
  • inventive techniques can be employed with product tags, product packaging, business cards, bags, charts, maps, labels, etc., etc., particularly those items including engraving of an laminate or over-laminate structure.
  • ID document thus is broadly defined herein to include these tags, labels, packaging, cards, etc.
  • Personalized data can, for example, be “personal to” or “specific to” a specific cardholder or group of cardholders.
  • Personalized data can include data that is unique to a specific cardholder (such as biometric information, image information), but is not limited to unique data.
  • Personalized data can include some data, such as birthdate, height, weight, eye color, address, etc., that are personal to a specific cardholder but not necessarily unique to that cardholder (i.e., other cardholders might share the same personal data, such as birthdate).
  • personalized data can also include some types of data that are not different from card to card, but that are still provided at the time of card personalization.
  • a state seal that is laser engraved onto a portion of an overlaminate in an identification document, where the laser engraving occurs during the personalization of the card could in some instances be considered to be “personalized” information.
  • laser engraving and “laser marking” are used interchangeably herein.
  • indicium and indicia as used herein cover not only markings suitable for human reading, but also markings intended for machine reading. Especially when intended for machine reading, such an indicium need not be visible to the human eye, but may be in the form of a marking visible only under infra-red, ultra-violet or other non-visible radiation.
  • an indicium formed on any layer in an identification document e.g., the core layer
  • Laminates usable with at least some embodiments of the invention include those which contain substantially transparent polymers and/or substantially transparent adhesives, or which have substantially transparent polymers and/or substantially transparent adhesives as a part of their structure, e.g., as an extruded feature.
  • Examples of usable laminates include at least polyester, polycarbonate, polystyrene, cellulose ester, polyolefin, polysulfone, or polyamide.
  • Laminates can be made using either an amorphous or biaxially oriented polymer as well.
  • the laminate can comprise a plurality of separate laminate layers, for example a boundary layer and/or a film layer.
  • the degree of transparency of the laminate can, for example, be dictated by the information contained within the identification document, the particular colors and/or security features used, etc.
  • the thickness of the laminate layers is not critical, although in some embodiments it may be preferred that the thickness of a laminate layer be about 1-20 mils.
  • Lamination of any laminate layer(s) to any other layer of material can be accomplished using any conventional lamination process, and such processes are will-known to those skilled in the production of articles such as identification documents.
  • the types and structures of the laminates described herein are provided only by way of example, those skilled in the art will appreciated that many different types of laminates are usable in accordance with the invention.
  • a laminate in ID documents, can provide a protective covering for the printed substrates and provides a level of protection against unauthorized tampering (e.g., a laminate would have to be removed to alter the printed information and then subsequently replaced after the alteration.).
  • Various lamination processes are disclosed in assignee's U.S. Pat. Nos. 5,783,024, 6,007,660, 6,066,594, and 6,159,327. Other lamination processes are disclosed, e.g., in U.S. Pat. Nos. 6,283,188 and 6,003,581. Each of these U.S. patents is herein incorporated by reference.
  • Laminates can include synthetic resin-impregnated or coated base materials composed of successive layers of material, bonded together via heat, pressure, and/or adhesive. Laminates also includes security laminates, such as a transparent laminate material with proprietary security technology features and processes, which protects documents of value from counterfeiting, data alteration, photo substitution, duplication (including color photocopying), and simulation by use of materials and technologies that are commonly available. Laminates also can include thermosetting materials, such as epoxy.
  • ID document structures e.g., TESLIN-core, multi-layered ID documents
  • fused polycarbonate structures e.g., fused polycarbonate structures
  • inventive techniques can be applied to many other structures formed in many different ways to improve their laser engraving characteristics.
  • the invention has applicability for virtually any product which is to be laser engraved, especially products being engraved with grayscale images.
  • the invention is usable with virtually any product which is to be laser engraved or marked, especially articles to which a laminate and/or coating is applied, including articles formed from paper, wood, cardboard, paperboard, glass, metal, plastic, fabric, ceramic, rubber, along with many man-made materials, such as microporous materials, single phase materials, two phase materials, coated paper, synthetic paper (e.g., TYVEC, manufactured by Dupont Corp of Wilmington, Del.), foamed polypropylene film (including calcium carbonate foamed polypropylene film), plastic, polyolefin, polyester, polyethylenetelphthalate (PET), PET-G, PET-F, and polyvinyl chloride (PVC), and combinations thereof.
  • TYVEC manufactured by Dupont Corp of Wilmington, Del.
  • foamed polypropylene film including calcium carbonate foamed polypropylene film
  • plastic polyolefin, polyester, polyethylenetelphthalate (PET), PET-G, PET-F, and polyvinyl chloride (PVC), and combinations
  • At least one embodiment of the invention relates to virtually any article formed from, laminated with, or at least partially covered by a material that not sufficiently responsive to laser radiation to form a desired indicium (e.g., a grayscale image) thereon, but which is rendered more responsive to laser radiation, at least to a sufficient degree to enable its surface to be marked as desired with a laser beam, by adding the inventive laser enhancing additive to the material itself or to another material (e.g., a coating or laminate) that is substantially adjacent to the material.
  • a desired indicium e.g., a grayscale image
  • a portion of a structure such as a multi-layered structure (including after lamination), such as an ID document, with text, information, graphics, logos, security indicia, security features, marks, images and/or photographs. It would be advantageous if techniques were available to enable laser engraving to produce some or all of these features, especially gray scale and/or color images and photographs.
  • some parts of a multi-layered ID document structure can be non-conducive to acceptable engraving of specific types of information.
  • some materials can be laser engraved (using, for example, a C0 2 laser) with text information (e.g., dark on light), but cannot be satisfactorily laser engraved with usable grayscale information (e.g., grayscale information conveying up to 256 shades of gray), such as images or photographs, or full color information.
  • the ability to provide gray scale images on an identification document using a laser can be advantageous because it can provide increased security of the identification document.
  • additional security features such as digital watermarks
  • one embodiment of the invention involves sensitizing at least one of the layers in a multi-layered structure, such as at least one laminate layer, to help to overcome the problem of the laminate material not being responsive to laser engraving and/or not being responsive enough to be capable of having grayscale images laser engraved thereon.
  • a layer of laminate is modified by adding an effective amount of one or more laser sensitive additives to the laminate material.
  • the laser sensitive additives described herein can be divided over two or more layers to provide improved laser engraving performance.
  • we have found that the laser sensitive additives also will improve laser engraving if they are present in a coating applied to a material to be engraved.
  • a least one embodiment of the first aspect of the invention is based on the surprising discovery that the process of laser engraving of materials such as laminates is improved and enhanced by adding to the laminate a first effective amount of a first composition, the first composition being at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) together with a second effective amount of a second composition, the second composition being at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO 2 Na or R—OSO 2 Na), and Thioester (e.g., substances containing —SH).
  • ZnS zinc sulfide
  • BaS barium sulfide
  • alkyl sulfonate e.g., RSO 2 Na or R—OSO 2 Na
  • Thioester e.g., substances containing —SH
  • the combination of CuI or CuKI 3 together with at least one of ZnS, BaS, alkyl sulfonate, and thioester will hereinafter be referred to as the “inventive laser enhancing additive”.
  • the components of the inventive laser enhancing additive namely the component comprising at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) and the component comprising at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO 2 Na or R—OSO 2 Na), and Thioester, will sometimes be referred to as the “inventive laser enhancing additives”).
  • the effective amounts of the first and second compositions can vary depending on the material to which the inventive laser enhancing additive is added and on the laser engraving technique being employed.
  • the inventive laser enhancing additive includes equivalent amounts of the first and second compositions.
  • the inventive laser enhancing additive includes more of the second composition than the first composition.
  • the inventive laser enhancing additive includes more of the first composition than the second composition.
  • inventive laser enhancing additive increases the molecular activity within the laminate when the heat from the laser is applied, enabling the laminate to respond faster and/or more intensely to the laser energy. It also is possible that the additive increases the opacity of the laminate, enabling it to better respond to laser energy. It also is possible that the components of the inventive laser enhancing additive react with each other and/or with the host material to form black species within the host material.
  • inventive laser enhancing additive high quality images and other engravings can be formed on articles such as multi-layered ID documents at acceptable throughput rates by modifying the materials being engraved by adding the inventive laser enhancing additives to the material (or by coating the material with a coating containing the inventive laser enhancing additive, as discussed further in the second aspect of the invention).
  • inventive laser enhancing additive can not only make a material that is non-sensitive to laser radiation more sensitive to laser radiation, but also can reduce the laser engraving time as well.
  • high definition images such as gray scale images (which can be used on identification documents), can be created with the laser engraving process.
  • use of any of the above laser enhancement formulations improves the quality of the laser engraving by increasing the contrast,(including at least dark colors on light backgrounds) that can occur when using a laser having a given power level.
  • the increased contrast resulting from use of one of the above-described laser enhancing additives may enable the laser engraving to be accomplished using a lower-power laser than would need to be used without user of the laser enhancing additive.
  • the increased sensitivity resulting from use of one of the above-described laser enhancing additives may reduce the time necessary to accomplish the laser engraving.
  • any of the above-described inventive laser enhancing additives can be added to virtually any material (including all known thermoplastics and thermosets) to enhance the process of laser marking and/or laser engraving of either the material to which the inventive laser enhancing additive is added or any material disposed substantially adjacent thereto.
  • the addition of the inventive laser enhancing additive enables whatever material(s) it has been added to be laser engraved with a grayscale image.
  • a first part of the inventive laser enhancing additive i.e., a part that contains an effective amount of CuI or CuKI 3
  • a second part of the inventive laser enhancing additive i.e., part that contains an effective amount at least one of ZnS, BaS, alkyl sulfonate, and thioester
  • the inventive laser enhancing additive can be added to a core material that is laminated with a material that is transparent to laser radiation, wherein the core material also can be laser engraved.
  • the inventive laser enhancing additive is added to core, laminate and/or over laminate materials used in the manufacture of identification documents, to improve the process of laser engraving or marking of the identification documents and to enable laser engraving of a grayscale image on the identification documents.
  • the laser enhancing additives in accordance with the invention are usable for both materials that usually are not sensitive to laser radiation as well as materials that are already sensitive to laser radiation.
  • the inventive laser enhancing additive can be present in a material, such as a laminate, at the same time that other compositions (e.g., other laser enhancing or absorbing additives, reinforcing fillers, antioxidants, flame retardants, stabilizers, plasticizers, lubricants, dispersants, and the like) are present in the same material and/or a separate layer of material
  • laminate materials to which the inventive laser enhancing additive may be added include (but are not limited to) polyester, polycarbonate (PC), fused polycarbonate, polyvinyl chloride (PVC), polyethylene, thermosets, thermoplastic and thermoplastic resins (including those that foam when heated), engineering thermoplastics (ETP), polyurethane, polyamides, expanded polypropylene (EPP), polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC and ABS/PC products, high impact polystyrene (HIPS), polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate (PBS), acetal copolymer (POM), and polyetherimide (PEI), polymer, copolymer, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polystyrene, polyacrylate, poly(4-
  • the resultant concentration of the inventive laser enhancing additive in the laminate, by weight ranges from 0.001% to 0.1% by weight.
  • the inventive laser enhancing additive is added at larger concentrations (e.g., from 0.1% to 100%). At concentrations larger than 0.1%, the inventive laser enhancing additive can still be used to enhance laser marking or engraving, but at possible sacrifice of some of the transparency of the laminating material (if, in fact, the laminating material is substantially transparent or translucent to begin with).
  • the laser enhancing additive is about 0.06% by weight in the laminate.
  • the 0.06% by weight includes 0.03% by weight of at least one of CuI or CuKI 3 and 0.03% by weight of at least one of ZnS, BaS, alkyl sulfonate, and thioester.
  • concentration ranges for the laser enhancing formulations may be usable, especially when using opaque materials and colored materials.
  • proportions of the at least one of CuI or CuKI 3 and of the at least one of ZnS, BaS, alkyl sulfonate, and thioester also can vary.
  • the concentration of the inventive laser enhancing additive that is usable with a given laminate is at least in part dependent on the properties of the laminate and the ultimate use, durability, environmental conditions, etc., to which the laminate is subject. It is possible that higher concentrations of the laser enhancing formulations in the laminate may affect one or more properties of the laminate, such as transparency, durability, malleability, opacity, rigidity, etc. Of course, appropriate quantities of the additives can be determined for a particular over-laminate application without undue experimentation. Additional factors may include engraving time and process, base over-laminate material or composition, and desired engraving quality.
  • inventive laser enhancing additive can be added to a laminate that is affixed (e.g., by adhesive, lamination, chemical reaction, etc.) to virtually any product, to enable the laminate to be laser engraved, especially with a grayscale image, thereby producing (especially if the laminate is substantially transparent or translucent) a laser engraving or marking on the laminate affixed to the article.
  • inventive laser enhancing laminate has applicability to the manufacture many different articles that can be laminated, including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, and toys.
  • RFID radio frequency
  • inventive laser enhancing additive can be added to the laminate in many different ways.
  • the following technique describes the preparation and addition of the inventive laser enhancing additive to the laminate in accordance with one embodiment of the first aspect of the invention.
  • the technique will be described in connection with an embodiment wherein the laminate comprises polycarbonate and the inventive laser enhancing additive comprises CuKI 3 and ZnS, but illustration of this particular formulation should not be viewed as limiting.
  • preparation of the inventive laser enhancing additive can be accomplished by using a twin screw extruder to create a highly concentrated polymer blend (so-called “masterbatch”) of the inventive laser enhancing additive.
  • the masterbatch is created by combining the desired host material (e.g., polycarbonate) with the inventive laser enhancing additive, (e.g., ZnS and CuKI 3 ).
  • the host material and the inventive laser enhancing additive are dried prior to blending to minimize any degradation of each of the components.
  • inventive laser enhancing additive preparations that can be utilized in at least some embodiments of the invention:
  • a colayer can be made whereby sensitized material (i.e., material to which the inventive laser enhancing additive is added) is extruded against nonsensitive material.
  • sensitized material i.e., material to which the inventive laser enhancing additive is added
  • the optimum concentration for marking of polycarbonate and maximizing optical properties is 0.06% by weight. Concentrations can be used up to 0.1% by weight; concentrations higher than 0.1% may cause visible reductions of the transparency of transparent materials.
  • more than one-of the previously described inventive laser-enhancing additives can be used as an additive (e.g., ZnS and CuKI 3 along with BaS and CuI), and other known laser-enhancing additives can also be combined with one or more of the previously described inventive laser-enhancing additives in the above techniques.
  • FIG. 3 is an illustrative cross-sectional view of an ID document 10 in accordance with a first embodiment of the first aspect of the invention.
  • an inventive ID document 10 preferably includes a multi-layered structure, as shown in FIG. 3 .
  • the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 3 differs from the prior art.
  • the identification document 10 comprises a layer of core material 50 and at least one layer of a first laminate 52 to which the inventive laser enhancing additive has been added ( a laminate to which the inventive laser enhancing additive is added will also be referred to herein as the “inventive laminate”).
  • a laminate layer is preferably added to the front and back surface of the core to form the multi-layer structure.
  • the core material 50 is 10 mils of a substantially opaque white laminate core, such as a TESLIN-based core.
  • the core material 50 can be pre-printed to include an indicium 54 A such as fixed or variable information or data.
  • the pre-printing can include screen-printing, offset printing, laser or ink-jet printing, flexography printing, or the like.
  • “Fixed” information may include non-individual dependent information, such as department or company information, state information, etc., etc.
  • Variable information, or information that is unique to the ID document holder can be printed, for example, via a color laser XEROGRAPHY process.
  • the fixed and/or variable information can also include one or more built in security features, as well, to help reduce identity fraud.
  • portions of the ID document 10 including either or both of the core material 50 and/or the laminate 52 , can include a security feature such as a security indicia or security pattern.
  • the security pattern can be applied in an ordered arrangement having a tightly-printed pattern, i.e., having a plurality of finely-divided printed and unprinted areas in close proximity to one another.
  • a tightly-printed pattern may, for example, appear as an often-repeated logo or design or a fine-line printed security pattern such is used in the printing of banknote paper, stock certificates and like and may take the form of filigree, guilloche or other fine-line printing.
  • U.S. Pat. No. 4,653,775 provides an example of such security printing and is hereby incorporated by reference. Note that the laser engraving facilitated by the invention can be used to print a security indicia or security pattern.
  • the laser engraving facilitated by the invention can be used to add a digital watermark to any indicia printed (whether conventionally or by laser engraving) on any layer of the ID document 10 .
  • Digital watermarking is a process for modifying physical or electronic media to embed a machine-readable code therein.
  • the media may be modified such that the embedded code is imperceptible or nearly imperceptible to the user, yet may be detected through an automated detection process.
  • the code may be embedded, e.g., in a photograph, text, graphic, image, substrate or laminate texture, and/or a background pattern or tint of the photo-identification document.
  • the code can even be conveyed through ultraviolet or infrared inks and dyes.
  • Digital watermarking systems typically have two primary components: an encoder that embeds the digital watermark in a host media signal, and a decoder that detects and reads the embedded digital watermark from a signal suspected of containing a digital watermark.
  • the encoder embeds a digital watermark by altering a host media signal. To illustrate, if the host media signal includes a photograph, the digital watermark can be embedded in the photograph, and the embedded photograph can be printed on a photo-identification document.
  • the decoding component analyzes a suspect signal to detect whether a digital watermark is present. In applications where the digital watermark encodes information (e.g., a unique identifier), the decoding component extracts this information from the detected digital watermark.
  • the core material 50 is laminated on both sides with 10 mils of the first laminate 52 that has been sensitized to laser energy by the addition of the inventive laser enhancing additive.
  • the first laminate 52 contains ZnS and CuKI 3 additives in a base laminate material such as polyester or polycarbonate.
  • the front and back first laminates 52 can be laminated using an adhesive (not visible in FIG. 3 ) such as co-polyester or olefin containing adhesive.
  • Other adhesives usable in accordance with this embodiment of the invention include polyester, polyester urethane, polyether urethane or polyolefin hot melt or ultraviolet or thermally cured adhesive.
  • the multi-layered structure is formed during a lamination process, in which adjustments to the processing time, temperature and pressure can be varied to optimize laminations.
  • usable laminates usable include those which contain substantially transparent polymers and/or substantially transparent adhesives, or which have substantially transparent polymers and/or substantially transparent adhesives as a part of their structure, e.g., as an extruded feature.
  • the first laminate 52 can comprise a plurality of separate laminate layers, for example a boundary layer and/or a film layer.
  • the first laminate 52 can comprise an optically clear durable plastic film, such as amorphous or biaxially oriented polyester.
  • the laminate need not be substantially transparent, but can be colored or opaque, so long as a grayscale image can be laser engraved onto it.
  • the types and structures of the laminates described herein are provided only by way of example, those skilled in the art will appreciated that many different types of laminates are usable in accordance with the invention.
  • the first laminate layers 52 can provide additional security features for the identification document 10 .
  • the first laminate 52 may include a low cohesivity polymeric layer, an optically variable ink, an image printed in an ink which is readable in the infra-red or ultraviolet but is invisible in normal white light, an image printed in a fluorescent or phosphorescent ink, or any other available security feature which protects the document against tampering or counterfeiting, and which does not compromise the ability of the first laminate 52 to be laser engraved.
  • the first laminate is formed into a pouch into which the core material 50 slips.
  • methods such as heat, pressure, adhesives, and the like, are usable to bond the core material 50 to the first laminate 52 formed into a pouch.
  • adhesive can be applied to the first laminate 52 via methods such as solvent coating, casting, or hot melt extrusion.
  • the adhesive may also be coated, cast or extruded onto a surface of the core material 50 .
  • the first laminate 52 can then be heat laminated to the core material 50 to form a secure bond. Additional processes that can be used to form the first laminate 52 onto the core material include injection molding or extrusion of a hot melt onto the core material 50 .
  • Those skilled in the art will appreciate that virtually any known method can be used to couple the first laminate 52 to the core material 50 . For example, techniques such as standard heat and pressure, pressure only, chemical fusion via solvent blending, ultraviolet (UV) methodologies, and/or electron beam (EB) methodologies can be used to laminate the first laminate 52 to the core material 50 .
  • UV ultraviolet
  • EB electron beam
  • the ID document 10 is ready for laser engraving.
  • the laser engraving is used to personalize the ID document.
  • a usable laser for engraving is a neodymium:yttrium aluminum garnet (Nd:YAG) laser using both 3 Watt (W) (103D) and 10 W (Powerline E) power outputs (a laser that is usable with at least one embodiment of the invention can be purchased from Rofin Baasel Lasertech of Boxborough, Mass.).
  • the 10 W laser of this device uses a true grey scale marking software compared to the 3 W which does not.
  • the Nd:YAG laser emits light at a wavelength of about 1064 nanometers (nm).
  • the inventive laser enhancing additive improves the responsiveness of the first laminate 52 to the laser, the time to laser engrave a given area can be decreased as compare to the time to mark a given area in a laminate that does not have the inventive laser enhancing additive, when using the same laser”.
  • the improvement in responsiveness can enable grayscale images, such as images with up to 256 different shades of gray, to be laser engraved into the laminate 52 , especially when an Nd:Yag laser (including lamp pumped YAG lasers, diode pumped Nd:Yag lasers, and light pumped Nd:Yag lasers) is used.
  • an Nd:Yag laser including lamp pumped YAG lasers, diode pumped Nd:Yag lasers, and light pumped Nd:Yag lasers
  • the effective amount of the inventive laser enhancing additive used and the material in which it is used can be adapted to achieve similar improvements in laser engraving when using other types of lasers, such as, excimer lasers and C0 2 laser
  • inventive laser enhancing additive can improve the laser engraving of so-called “vector information” of an identification document.
  • Vector information is non-captured information (such as logos) in an identification document and generally does not include so-called “pixel” information, which is information that is captured, such as signature images and/or photographic images.
  • pixel information
  • the inventive laser enhancing additive is added to a material being laser engraved with vector information, it is possible to sufficiently sensitize the material such that the vector information can be engraved to achieve the “tactile feel” known in the art of laser engraving.
  • one or more indicia 54 B- 54 F such as variable information (e.g., birth date, address, biometric information, etc.) is engraved into the over laminate layer 52 through a focused laser beam.
  • the laser used is an Nd:YAG laser; other suitable lasers (e.g., C0 2 ) can, of course, be similarly employed.
  • the area irradiated by the laser absorbs the laser energy and produces heat which causes a visible discoloration in the first laminate 52 .
  • the visible discoloration serves as a “mark” or indicator.
  • the heat from the laser beam causes a foaming as shown in indicia 54 D; the foaming can create a raised area in the first laminate 52 that provides a tactile feel when touched.
  • the indicia 54 B-F can comprise virtually any type of information, including photographs, data, images, fingerprints, and text. Although not apparent in the cross sectional view of FIG. 3 , our testing has shown that the indicia 54 B-F can comprise a usable grayscale image (by usable, it is at least meant that image can be used for security purposes, such as identification or authentication). In experiments, the inventor was able to engrave an acceptable gray scale photograph, non-tactile text and tactile text into the laminate layer 52 .
  • FIG. 3 illustrates that the first laminate 52 that contains the inventive laser enhancing additive overlays substantially all of the core material 50
  • the inventive laser enhancing additive can be added to a laminate that forms merely a portion of the laminate covering a core material 50 .
  • FIG. 4 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the first aspect of the invention.
  • the ID document 10 preferably includes a multi-layered structure.
  • the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 4 differs from the prior art.
  • the portion of first laminate 52 containing the inventive laser enhancing additive is disposed at least partially within a layer of another material, such as so-called “plain” laminate 56 (i.e., laminate that does not contain the inventive laser enhancing additive).
  • the plain laminate 56 may comprise a material that is inherently sensitive to laser radiation or can be a material that is insensitive to laser radiation.
  • the layer of other material in which the first laminate 52 containing the inventive laser enhancing additive is disposed need not even be a laminate at all.
  • the surface of the article can include a portion or “window” of first laminate 52 containing the inventive laser enhancing additive, whereas the rest of the surface is some other material (e.g., ceramic). This configuration may be applicable, for example, in the marking of electronic components and/or devices.
  • FIG. 5 is an illustrative cross sectional view of an identification document 10 in accordance with a third embodiment of the first aspect of the invention.
  • the ID document 10 preferably includes a multi-layered structure.
  • the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 5 differs from the prior art.
  • a first portion of the inventive laser enhancing additive is disposed in a first laminate layer 52 and a second portion of the inventive laser enhancing additive is disposed in a second laminate layer 55 .
  • the first laminate layer 52 contains an effective amount of at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) and the second laminate layer 55 contains an effective amount of at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester.
  • the first laminate layer 52 and second laminate layer 55 are constructed and arranged so that a laser beam can pass through both the first laminate layer 52 and the second laminate layer 55 , to form indicia 66 , 64 in one or both of the first and second laminate layers 52 , 55 , respectively.
  • whether an indicia is formed in a given laminate layer depends on the particular type of laser used the manner in which the laser is used (e.g., pumped), and the duration of the application of laser energy.
  • the first laminate layer 52 contains the effective amount of at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) and the second laminate layer 55 contains the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, the positions of the two compounds in the respective first and second layers could be reversed.
  • CuKI 3 copper potassium iodide
  • CuI copper iodide
  • ZnS zinc sulfide
  • BaS barium sulfide
  • alkyl sulfonate and thioester the positions of the two compounds in the respective first and second layers could be reversed.
  • the first laminate layer 52 could contain the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester
  • the second laminate layer 55 could contain the effective amount of copper potassium iodide (CuKI 3 ) or copper iodide (CuI).
  • the ID document 10 further comprises a layer of core material 50 (in this example, the layer of core material is 10-20 mils thick) to which the first laminate 52 is laminated on either side.
  • the core material 50 is printed with pre-printing 70 on its outer surface.
  • the pre-printing 70 is nonvariable information, such as organization name, logo, and the like.
  • the first laminate layer 52 can also be printed with printed information 72 using a technique such as dye diffusion thermal transfer.
  • a third layer 57 is disposed between the first laminate layer 52 and the second laminate layer 55 .
  • the third layer 57 is a material (for example, a laminate or an adhesive) that is transparent to laser radiation and permits a laser beam directed at the second layer 55 to penetrate, at least partially to the first layer 52 .
  • the first laminate 52 can be made from a material that is inherently (i.e., even without the addition of the inventive laser enhancing additive or any portion thereof) more responsive to laser radiation than is the second laminate 55 .
  • the area in the first laminate 52 that is irradiated can “bubble up” to the second layer 55 , to form a bond 68 between the first laminate 52 , second laminate 55 , and (optionally) the third layer.
  • the ID document 10 of the embodiment of FIG. 5 is a multi-layer fused polycarbonate structure used as an ID document.
  • the multi-layered structure preferably includes a core and at least a top and bottom over-laminate.
  • the core material 50 may include a titanium dioxide (TiO 2 ) filled polycarbonate (PC) film, which generally has a whitish color.
  • the core material 50 can have pre printed information 70 thereon prior to the fusing process. Examples of acceptable pre-printing processes include screen-printing, offset printing, laser or ink-jet printing, flexography printing, and the like.
  • the core material 50 and first laminate 52 are fused (e.g., using heat and pressure, such as by a platen press) together to form a structure 53 , which helps to deter delaminating attempts.
  • the structure 53 in this example is a solid PC ID document 10 . Adjusting the time, temperature and pressure can help to bond the first laminate 52 to the polycarbonate core material 50 .
  • the second laminate 55 can be an overlaminate material.
  • FIG. 6 is an illustrative cross sectional view of an identification document in accordance with a fourth embodiment of the invention.
  • the ID document 10 preferably includes a multi-layered structure.
  • the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 6 differs from the prior art.
  • FIG. 6 is an illustrative cross sectional view of an identification document in accordance with a fourth embodiment of the invention.
  • the ID document 10 preferably includes a multi-layered structure.
  • the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 6 differs from the prior art.
  • the ID card 10 includes a core material 50 (shown for illustrative purposes only to be about 10 mils thick) to which is laminated a layer (shown for illustrative purposes only to be about 5 mils thick) of first laminate 52 to which the inventive laser enhancing additive is added.
  • a layer of second laminate 58 (shown for illustrative purposes to be about 5 mils thick), which in this embodiment is made from a material that is not sensitive to laser radiation.
  • the second laminate 58 is a transparent material.
  • a laser is used to engrave the first laminate 52 with indicia 54 I- 54 J. The total thickness of the ID document 10 of FIG.
  • the core material 50 could be 20 mils thick
  • the first laminate 52 could be 2 mils thick
  • the second laminate 58 could be 3 mils thick.
  • FIG. 6 only illustrates a single layer of laminate over the first laminate 52 (which has added to it the inventive laser enhancing additive), it will be appreciated that many more layers can be added over the first laminate 52 , so long as the laser being used is able to reach the first laminate 52 .
  • inventive laminates described herein may offer one or more advantages.
  • using the inventive laminates can enable the inventive laminates to be laser marked or engraved with usable grayscale images.
  • using the inventive laminates can enable faster laser engraving or marking at lower laser power levels.
  • the laser engraving that is possible using the inventive laminates is durable, abrasion resistant, and environmentally friendly.
  • the above-described inventive laser enhancing additive can be added to a coating on a at least a portion of a surface to be laser engraved or marked, to help to overcome the problem that the material being laser engraved or marked is responsive to laser engraving and/or is not responsive enough to be capable of having grayscale images laser engraved thereon.
  • the ability to laser engrave at least some materials can be improved and/or the time to laser engrave at least some materials can be reduced, by coating the area of the given material to be engraved with a coating that contains the inventive laser enhancing additive.
  • the coating containing the inventive laser enhancing additive can be applied to a laminate or another coating.
  • the compounds that make up the inventive laser sensitive additives described herein can be divided over two or more coatings, or a coating and a laminate, to provide improved laser engraving performance.
  • a least one embodiment of the second aspect of the invention is based on the surprising discovery that the process of laser engraving of materials, especially materials used in the manufacture of identification documents, is improved and enhanced by coating the area of the material to be engraved with a coating that includes a first effective amount of a first composition, the first composition being at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) together with a second effective amount of a second composition, the second composition being at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO 2 Na or R—OSO 2 Na), and Thioester (e.g., substances containing —SH).
  • ZnS zinc sulfide
  • BaS barium sulfide
  • alkyl sulfonate e.g., RSO 2 Na or R—OSO 2 Na
  • Thioester e.g.
  • the combination of CuI or CuKI 3 together with at least one of ZnS, BaS, alkyl sulfonate, and thioester continues to be referred to as the “inventive laser enhancing additive”.
  • the resultant concentration of the inventive laser enhancing additive in the coating ranges from 0.001% to 0.1% by weight.
  • the inventive laser enhancing additive is added at larger concentrations (e.g., from 0.1% to 100%). At concentrations larger than 0.1%, the inventive laser enhancing additive can still be used to enhance laser marking or engraving of an article or surface being coated, but at possible sacrifice of some of the transparency of the coating (if, in fact, the coating is substantially transparent or translucent to begin with).
  • the laser enhancing additive is about 0.06% by weight in the coating.
  • the 0.06% by weight includes 0.03% by weight of at least one of CuI or CuKI 3 and 0.03% by weight of at least one of ZnS, BaS, alkyl sulfonate, and thioester.
  • the proportions of the at least one of CuI or CuKI 3 can vary, as can proportions of the at least one of ZnS, BaS, alkyl sulfonate, and thioester also can vary. That is, a given composition could have, for example (using for purely illustrative purposes the example of a composition containing CuI and BaS), equal amounts of CuI and BaS, or 3 parts CuI to 5 parts BaS, 2 parts CuI to 1 part BaS, etc.
  • At least one advantageous compound that we have tested uses the two sub compositions (e.g., the CuI and BaS, in this example) in equal proportions.
  • the concentration of the inventive laser enhancing additive that is usable with a given coating is at least in part dependent on the properties of the coating (especially the binder material in the coating) laminate and the ultimate use, durability, environmental conditions, etc., to which the coating is subject. It is possible that higher concentrations of the laser enhancing formulations in the coating may affect one or more properties of the coating, such as transparency, durability, malleability, opacity, rigidity, etc. Of course, appropriate quantities of the additives can be determined for a particular coating application without undue experimentation. Additional factors may include engraving time and process and desired engraving quality.
  • inventive laser enhancing additive can be added to a coating that is applied (by virtually any known method) to virtually any surface, article, or product., to enable the surface, article, or product to be laser engraved, especially with a high quality grayscale image.
  • inventive laser enhancing laminate has applicability to the manufacture many different articles that can be coated, including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, and toys.
  • RFID radio frequency
  • the effective amounts of the first and second compositions that are added to the coating can vary depending on the type of coating (e.g., the binder material and/or other additives present in the coating), the material being coated, and on the laser engraving technique being employed.
  • the inventive laser enhancing additive in the coating includes equivalent amounts of the first and second compositions described above.
  • the coating includes more of the second composition than the first composition.
  • the coating includes more of the first composition than the second composition.
  • the inventive laser enhancing additive can be added to many different types of coatings, including organic coatings and aqueous coatings, substantially transparent coatings and non-transparent coatings.
  • the coating containing the inventive laser enhancing additive can further comprise a binder, which can be, for example, latex, emulsion, a thermoset binder or a thermoplastic binder.
  • binder materials which we have found to be usable include resins, polyesters, polycarbonates, vinyls, acrylates, urethanes, and cellulose based materials.
  • a coating containing the inventive laser enhancing additive can also include other additives known in the art, such as colorants (e.g., pigments or dyes), stabilizers, lubricants, adhesion promoting agents, toners, surfactants, anti-static agents, thickeners, thixotropic agents, and the like.
  • the inventive laser enhancing additive also referred to herein as the “inventive coating”
  • the high quality images can include both grayscale laser engraved images (as described herein) and full color laser engraved images (which are more particularly described in applicants' commonly assigned U.S. provisional patent application, application No. 60/344,674, entitled “Full Color Laser Engraved systems for Identification Card Imaging,” attorney docket no. P0504, filed Dec. 24, 2001).
  • inventive coating can be applied to virtually any part of the surface of any article where laser marking, especially laser engraving of grayscale images, is desired. The entire article or surface need not be coated.
  • identification documents including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, toys, etc.
  • RFID radio frequency
  • inventive coating as contemplated herein, can be applied over other coatings (or materials) that cover the surface of an article to be laser engraved or marked, so long as the “intervening” materials between the surface being laser engraved or marked and the inventive coating are transparent to laser radiation.
  • the inventive coating is used to improve the manufacture of an identification document, such as the identification document 10 shown in FIGS. 1 and 2 .
  • the security of the document can be enhanced through selective coating of the core layer of the identification document 10 with the inventive coating
  • the coating material can be applied through a controlled process (e.g., offset, flexography, pad printing, or screen printing)
  • the placement of the inventive coating and, thus, the laser enhancing additive
  • the coating material is sensitive (or responsive to) the laser, so the placement of the inventive coating dictates the location of the engraved information. Selective placement of the laser sensitive materials also help to prevent counterfeiting, since the laser engraveable areas are limited.
  • the inventive coating is applied to an identification document and the issuing authority for the identification document (e.g., a state's DMV, a passport authority, etc.) can be involved with the design layout, creating unique coating patterns for the document's core.
  • the coating layout can be held secret, further enhancing the security of the document, while creating obstacles for the counterfeiter.
  • Changing the coating materials (e.g., the binder)or additive concentration or adhesive will alter the coating placement and response, creating even further obstacles for the counterfeiter and may make one or more portions of the identification document impossible to engrave with a usable indicia and difficult to duplicate.
  • inventive coating described herein may provide at least some of the same advantages (especially in the production of grayscale images) previously described in connection with use of the inventive laser enhancing laminate, and they are not repeated here.
  • inventive laser enhancing laminate may provide at least some of the same advantages (especially in the production of grayscale images) previously described in connection with use of the inventive laser enhancing laminate, and they are not repeated here.
  • the lasers previously described in connection with the first aspect of the invention are similarly usable in this second aspect of the invention, and their description is not repeated here.
  • the inventive laser enhancing additive can be divided between two optically adjacent layers (e.g., a first layer having a coating and a laminate, or two adjacent laminates (as previously described), or a first layer having a coating and a second layer having a coating).
  • This embodiment can be advantageous for security purposes. For example, during laser engraving, the same visible image can be engraved in both of the two layers, but, depending on the proportions of the inventive laser additive (and/or its layer component parts) disposed in each layer, the visible image will not necessarily look exactly the same in each layer. This can provide a visual effect that is difficult to duplicate.
  • a layer that is optically “closer” to the laser beam e.g., a top layer
  • a second layer that is optically more distant e.g., a layer below the top layer
  • the bottom layer will have a visible laser engraved image (e.g., a grayscale image)
  • the top layer will have a so-called “latent” laser engraved image that can be fainter but still visually perceptible to the naked human eye.
  • the either of the two layers could contain colorants (e.g., both visible and non visible (e.g., IR, UV) colorants that further differentiate between the visible laser engraved image and the latent laser engraved image.
  • optically adjacent it is meant that a laser can pass through from one layer (e.g., a laminate) to another layer (e.g., a second laminate or a core layer or layer having a coating thereon), such that both layers can be laser engraved by the same laser beam at substantially the same time.
  • Two layers that are optically adjacent need not be literally adjacent, although they can be.
  • the two layers can be directly adjacent (e.g., two layers that are fused together), or can be separated by a material that permits the laser beam to pass therethrough but does not itself necessarily have to react to the laser beam.
  • the two layers can be separated by an adhesive that permits laser light to pass therethrough), or can be separated by another type of layer (e.g., a thin film layer) that permits laser light to pass through).
  • the two layers can be, for example:
  • the LAZERFLAIR pigment can be added to a coating (in a similar manner as adding the above described inventive laser enhancing additive to a coating) to enable the laser engraving or marking of grayscale indicia on the article.
  • the LAZERFLAIR pigment is a laser enhancing additive when added to the actual material to be engraved (see, e.g., the Internet web page http://www.empigments.com/LazerFlair.cfm) such that contrast can be improved.
  • Our testing has shown, however, that LAZERFLAIR also can be added to a coating to improve the laser engraving of an article (e.g., a core layer in an identification document) to which the coating is applied.
  • the LAZERFLAIR additive is available from EM Pigments (EM Pigments can be contacted through 7 Skyline Drive, Hawthorne, N.Y. 10532 USA)
  • Embodiments of the inventive coating can be prepared in any customary manner known to those skilled in the art.
  • the inventive coating comprises an organic polymeric binder, copper potassium iodide, and zinc sulfide
  • the copper potassium iodide and zinc sulfide can be mixed into the organic polymeric binder during mixing using a blender; the additive can be ground using, for example, a ball mill to reduce particle size extrusion of the of the organic polymeric binder.
  • the inventive laser enhancing additive can be added to the coating as part of a masterbatch, such as was described previously for the inventive laser enhancing additives that were added to laminates.
  • a masterbatch containing 0.03% by weight of copper potassium iodide and 0.03% by weight of zinc sulfide can be produced and mixed with org), each of the two compounds.
  • At least one advantageous embodiment of the invention uses a coating that is a liquid form when applied to the ID document, use of a liquid coating is not necessary.
  • a liquid coating is not necessary.
  • those skilled in the art can, without undue experimentation, use the inventive laser enhancing additive in a coating that is applied in a non-liquid form (e.g., solid or powder that liquefies upon heating).
  • FIG. 7 is an illustrative cross sectional view of an identification document 10 in accordance with a one embodiment of the second aspect of the invention.
  • the ID document 10 preferably includes a multi-layered structure.
  • the ID document 10 may have an front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 7 differs from the prior art.
  • a core material 50 (which for illustrative purposes only is TESLIN), has top surface 67 and bottom surface 69 .
  • the core material 50 also could be pre printed with one or more indicia, such as variable information about the bearer of the identification document 10 , by a method such as color laser Xerography (note that illustrative examples of printing on the core layer 50 are shown in FIG. 5 ).
  • a portion of the top surface 67 of the core layer 50 is coated with an inventive coating 70 containing the inventive laser enhancing additive.
  • the inventive coating 70 could, of course, be applied to the bottom surface 69 , if desired.
  • the coating 70 can be applied selectively, so that only specific areas of the core material 50 are sensitized for laser engraving.
  • energy 72 from a laser can be specifically directed at the area of the ID document 10 that contains the inventive coating 70 , to produce indicia 54 l, 54 m on the material that was coated (which, in this example, is the core layer 50 ).
  • Such selective application of the inventive coating 70 can be advantageous, for example, in the manufacture of identification documents, because the placement and locations of the coating can be kept secret, to help hinder fraud. For example, counterfeiters may not be able to tell what information on the card has been laser engraved and what has not. Even those counterfeiters with access to a laser may not know which areas of the identification document are engraveable. Changing any of the components in the identification document, such as the binder, the inventive laser enhancing additive, or the concentration of the inventive laser enhancing additive.
  • the ID document 10 can later be personalized (e.g., have variable information, such an image, signature, birthdate, or biometric data) by laser engraving the coated portions of the core layer 50 with the variable information. This laser engraving can even occur if a laminate is applied over the inventive coating 70 , if the laminate permits laser energy 72 to pass therethrough to the inventive coating 70 and the core layer 50 .
  • a laminate 74 is shown as being disposed on top of the inventive coating 70 .
  • the laminate 74 can be applied before or after the coated areas of the core layer 50 are laser engraved.
  • the laminate 74 is transparent to laser radiation, applying it over the inventive coating 70 will not interfere with the ability of the laser radiation 72 to penetrate through to the inventive coating 70 and the core layer 50 . If, however, the laminate 74 is not transparent to laser radiation 72 , it can be applied after the laser engraving of the core material 50 has occurred.
  • the inventive coating 70 can be applied to the surface 67 by any known method (e.g., by offset, flexography, screen-printing, spraying, dipping, immersion, brushing, rolling, masking desired coating areas, etc.).
  • the thickness of the coating 70 is dependent on the article being coated, but can range from about 0.01 microns to about 50 microns for ID documents such as ID cards. It will be appreciated that other articles being laser engraved may require or use coatings having different thicknesses.
  • FIG. 7 illustrates that the coating 70 covers only a portion of the top surface 67 , this is not limiting.
  • the coating 70 can be applied to any surface, and can, if desired, cover the entire surface.
  • inventive coatings described herein may offer one or more advantages.
  • using the inventive coatings can enable the materials being coated to be laser marked or engraved with usable grayscale images.
  • using the inventive coatings can enable faster laser engraving or marking, at lower laser power levels.
  • the inventive coatings can be selectively applied to articles such as identification documents to increase security and deter fraud.
  • the laser engraving that is possible using the inventive coatings is durable, abrasion resistant, and environmentally friendly.
  • the invention utilizes the inventive laser enhancing laminate (or components thereof) in more than one layer on the identification document.
  • FIG. 8 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the second aspect of the invention.
  • the ID document 10 preferably includes a multi-layered structure, and the inventive laser enhancing additive is divided between two optically adjacent layers, as previously described.
  • the ID document 10 may have an front outward appearance generally similar to the identification document 10 of FIG. 1 , although the construction and components of the cross-section shown in FIG. 8 differs from the prior art.
  • a first portion of the inventive laser enhancing additive is disposed in a first coating 76 and a second portion of the inventive laser enhancing additive is disposed in a middle laminate 78 applied over the first coating 76 .
  • An overlaminate 74 is applied over the middle laminate 78 .
  • the first coating 76 is applied to the core layer 50 , which in FIG. 8 is made from an opaque white material, such as TESLIN or polycarbonate.
  • the first coating 76 contains a first effective amount of at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) and the middle laminate 78 contains a second effective amount of at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester.
  • the first effective amount is greater than the second effective amount, in this embodiment.
  • the first coating 76 and middle laminate 78 are constructed and arranged so that the laser radiation 72 can pass through both the first coating 76 and middle laminate 78 to form indicia 54 n, 54 o and latent indicia 82 , 84 on the ID document 10 .
  • the indicia 54 l, 54 m formed on the core layer 50 can be a usable grayscale image (by usable, it is at least meant that image can be used for security purposes, such as identification or authentication).
  • the latent indicia 82 , 84 can comprise lighter or fainter (but still visible) version of the indicia 54 n, 54 o.
  • the latent indicia 82 , 84 can be advantageous as a security feature because a counterfeiter may remove the middle laminate 78 in an attempt to alter information in the middle laminate 78 , but the information will still be present on the core layer 50 that has the first coating 76 . Similarly, a counterfeiter may attempt to remove then replace the middle laminate 78 , in order to alter information on the core layer 78 , but the latent indicia 82 , 84 will still be present and visible in the middle laminate 78 .
  • the type and placement of an indicia is formed on the core layer 50 depends on the particular type of laser used the manner in which the laser is used (e.g., pumped), and the duration of the application of laser energy.
  • the first coating 76 contains the effective amount of at least one of copper potassium iodide (CuKI 3 ) or copper iodide (CuI) and the middle laminate 78 contains the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, the positions of the two compounds in the respective first and second layers could be reversed.
  • CuKI 3 copper potassium iodide
  • CuI copper iodide
  • the middle laminate 78 contains the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester
  • the first coating 67 could contain the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester
  • the second coating 78 could contain the effective amount of copper potassium iodide (CuKI 3 ) or copper iodide (CuI).
  • identification documents manufactured in accordance with the invention can be produced in both over the counter and central issue environments.
  • a printing device that may be usable for at least some over the counter embodiments of the invention is the DATACARD DCL30 Desktop Card Laser Personalization System, available from Datacard Group of Minnetonka, Minn.
  • the ID document 10 is cooled and is cut (e.g., by die-cutting) to a predetermined size.
  • the substrate and laminate can be sized such that cutting the laminated printed substrate is not necessary.
  • the identification document 10 of the invention may be manufactured in any desired size.
  • identification documents can range in size from standard business card size (47.6.times.85.7 mm) up to identification booklet documents (127.times.177.8 mm), and can have thicknesses in the range of from about 0.3 to about 1.3 mm.
  • At least some identification documents produced in accordance with embodiments of the invention conform to all the requirements of ISO 7810, 1985 and will thus be of the CR-80 size, 85.47-85.73 mm wide, 53.92-54.03 mm high and 0.69-0.84 mm thick.
  • the corners of such CR-80 documents are rounded with a radius of 2.88-3.48 mm.
  • the present invention is not so limited.
  • the present invention can include addition color, alternative color schemes and even spot colors.
  • the present invention has been described with reference to NIR, the inventive technique can be expanded to include dyes responsive in the ultra-violet spectrum and other IR ranges.
  • inventive coatings described herein may be used to sensitize other core components as well.
  • the coating can be applied to both a document core and to an over-laminate, and that the laser engraving can be preformed in both (or either) the core and over-laminate.

Abstract

The invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive. The laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and a second quantity at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The composition can be engraved with grayscale images by an Nd:Yag laser and can be added to laminates or coatings. The composition can be used during the manufacture of many articles of manufacture, including identification documents.

Description

    RELATED APPLICATION DATA
  • The present application is related to U.S. patent application Ser. Nos. 09/747,735, filed Dec. 22, 2000, Ser. No. 09/602,313, filed Jun. 23, 2000, and Ser. No. 10/094,593, filed Mar. 6, 2002, U.S. Provisional Patent Application No. 60/358,321, filed Feb. 19, 2002, as well as U.S. Pat. No. 6,066,594. Each of the above U.S. patent documents is herein incorporated by reference.
  • CROSS REFERENCE TO RELATED APPLICATION
  • This application is a continuation of an application entitled “Laser Engraving Methods and Compositions, and Articles Having Laser Engraving Thereon,” Ser. No. 10/326,886, filed Dec. 20, 2002, attorney docket number P0724D, which itself claimed the priority of the following United States Provisional Applications, the contents of which are incorporated herein by reference in their entirety:
      • Sensitizing Materials for Laser Engraving (Application No. 60/344,677; Attorney Docket No. P0503—Inventor Brian Labrec), filed Dec. 24, 2001;
      • Laser Engraving Coating System (Application No. 60/344,675; Attorney Docket No. P0515—Inventor Brian Labrec), filed Dec. 24, 2001; and
      • Forming Variable Information In Identification Documents By Laser Ablation (Application No. 60/344,676, Attorney Docket No. P0516—Inventor: Brian LaBrec).
    TECHNICAL FIELD
  • The invention generally relates to methods and compositions for laser marking or engraving that contain one or more laser enhancing additives, as well as methods for conveying information, images, and security features on data carriers through laser engraving and marking, including laser engraving and marking using such compositions.
  • BACKGROUND
  • Identification documents (hereafter “ID documents”) play a critical role in today's society. One example of an ID document is an identification card (“ID card”). ID documents are used on a daily basis—to prove identity, to verify age, to access a secure area, to evidence driving privileges, to cash a check, and so on. Airplane passengers are required to show an ID document during check in, security screening, and prior to boarding their flight. In addition, because we live in an ever-evolving cashless society, ID documents are used to make payments, access an ATM, debit an account, or make a payment, etc.
  • Many types of identification cards and documents, such as driving licenses, national or government identification cards, bank cards, credit cards, controlled access cards and smart cards, carry thereon certain items of information which relate to the identity of the bearer. Examples of such information include name, address, birth date, signature and photographic image; the cards or documents may in addition carry other variant data (i.e., data specific to a particular card or document, for example an employee number) and invariant data (i.e., data common to a large number of cards, for example the name of an employer). All of the cards described above will hereinafter be generically referred to as “ID documents”.
  • In the production of images useful in the field of identification documentation, it is often times desirable to embody into a document (such as an ID card, drivers license, passport or the like) data or indicia representative of the document issuer (e.g., an official seal, or the name or mark of a company or educational institution) and data or indicia representative of the document bearer (e.g., a photographic likeness, name or address). Typically, a pattern, logo or other distinctive marking representative of the document issuer will serve as a means of verifying the authenticity, genuineness or valid issuance of the document. A photographic likeness or other data or indicia personal to the bearer will validate the right of access to certain facilities or the prior authorization to engage in commercial transactions and activities.
  • Identification documents, such as ID cards, having printed background security patterns, designs or logos and identification data personal to the card bearer have been known and are described, for example, in U.S. Pat. No. 3,758,970, issued Sep. 18, 1973 to M. Annenberg; in Great Britain Pat. No. 1,472,581, issued to G. A. O. Gesellschaft Fur Automation Und Organisation mbH, published Mar. 10, 1976; in International Patent Application PCT/GB82/00150, published Nov. 25, 1982 as Publication No. WO 82/04149; in U.S. Pat. No. 4,653,775, issued Mar. 31, 1987 to T. Raphael, et al.; in U.S. Pat. No. 4,738,949, issued Apr. 19, 1988 to G. S. Sethi, et al.; and in U.S. Pat. No. 5,261,987, issued Nov. 16 1993 to J. W. Luening, et al. All of the aforementioned documents are hereby incorporated by reference.
  • The advent of commercial apparatus (printers) for producing dye images by thermal transfer has made relatively commonplace the production of color prints from electronic data acquired by a video camera. In general, this is accomplished by the acquisition of digital image information (electronic signals) representative of the red, green and blue content of an original, using color filters or other known means. These signals are then utilized to print an image onto a data carrier. For example, information can be printed using a printer having a plurality of small heating elements (e.g., pins) for imagewise heating of each of a series of donor sheets (respectively, carrying sublimable cyan, magenta and yellow dye). The donor sheets are brought into contact with an image-receiving element (which can, for example, be a substrate) which has a layer for receiving the dyes transferred imagewise from the donor sheets. Thermal dye transfer methods as aforesaid are known and described, for example, in U.S. Pat. No. 4,621,271, issued Nov. 4, 1986 to S. Brownstein and U.S. Pat. No. 5,024,989, issued Jun. 18, 1991 to Y. H. Chiang, et al. Each of these patents is hereby incorporated by reference.
  • Commercial systems for issuing ID documents are of two main types, namely so-called “central” issue (CI), and so-called “on-the-spot” or “over-the-counter” (OTC) issue.
  • CI type ID documents are not immediately provided to the bearer, but are later issued to the bearer from a central location. For example, in one type of CI environment, a bearer reports to a document station where data is collected, the data are forwarded to a central location where the card is produced, and the card is forwarded to the bearer, often by mail. Another illustrative example of a CI assembling process occurs in a setting where a driver passes a driving test, but then receives her license in the mail from a CI facility a short time later. Still another illustrative example of a CI assembling process occurs in a setting where a driver renews her license by mail or over the Internet, then receives a drivers license card through the mail.
  • Centrally issued identification documents can be produced from digitally stored information and generally comprise an opaque core material (also referred to as “substrate”), such as paper or plastic, sandwiched between two layers of clear plastic laminate, such as polyester, to protect the aforementioned items of information from wear, exposure to the elements and tampering. The materials used in such CI identification documents can offer the ultimate in durability. In addition, centrally issued digital identification documents generally offer a higher level of security than OTC identification documents because they offer the ability to pre-print the core of the central issue document with security features such as “micro-printing”, ultra-violet security features, security indicia and other features currently unique to centrally issued identification documents. Another security advantage with centrally issued documents is that the security features and/or secured materials used to make those features are centrally located, reducing the chances of loss or theft (as compared to having secured materials dispersed over a wide number of “on the spot” locations).
  • In addition, a CI assembling process can be more of a bulk process facility, in which many cards are produced in a centralized facility, one after another. The CI facility may, for example, process thousands of cards in a continuous manner. Because the processing occurs in bulk, CI can have an increase in efficiency as compared to some OTC processes, especially those OTC processes that run intermittently. Thus, CI processes can sometimes have a lower cost per ID document, if a large volume of ID documents are manufactured.
  • In contrast to CI identification documents, OTC identification documents are issued immediately to a bearer who is present at a document-issuing station. An OTC assembling process provides an ID document “on-the-spot”. (An illustrative example of an OTC assembling process is a Department of Motor Vehicles (“DMV”) setting where a driver's license is issued to person, on the spot, after a successful exam.). In some instances, the very nature of the OTC assembling process results in small, sometimes compact, printing and card assemblers for printing the ID document.
  • OTC identification documents of the types mentioned above can take a number of forms, depending on cost and desired features. Some OTC ID documents comprise highly plasticized polyvinyl chloride (PVC) or have a composite structure with polyester laminated to 0.5-2.0 mil (13-51 .mu.m) PVC film, which provides a suitable receiving layer for heat transferable dyes which form a photographic image, together with any variant or invariant data required for the identification of the bearer. These data are subsequently protected to varying degrees by clear, thin (0.125-0.250 mil, 3-6 .mu.m) overlay patches applied at the print head, holographic hot stamp foils (0.125-0.250 mil 3-6 .mu.m), or a clear polyester laminate (0.5-10 mil, 13-254 .mu.m) supporting common security features. These last two types of protective foil or laminate sometimes are applied at a laminating station separate from the print head. The choice of laminate dictates the degree of durability and security imparted to the system in protecting the image and other data.
  • FIGS. 1 and 2 illustrate a front view and cross-sectional view (taken along the A-A line), respectively, of an exemplary prior art identification (ID) document 10. In FIG. 1, the prior art ID document 1 includes a photographic image 12, a bar code 14 (which may contain information specific to the person whose image appears in photographic image 12 and/or information that is the same from ID document to ID document), variable personal information 16, such as an address, signature, and/or birthdate, and biometric information 18 associated with the person whose image appears in photographic image 12 (e.g., a fingerprint). Although not illustrated in FIG. 1, the ID document 10 can include a magnetic stripe (which, for example, can be on the rear side (not shown) of the ID document 10), and various security features, such as a security pattern (for example, a printed pattern comprising a tightly printed pattern of finely divided printed and unprinted areas in close proximity to each other, such as a fine-line printed security pattern as is used in the printing of banknote paper, stock certificates, and the like).
  • Referring to FIG. 2, the ID document 10 comprises a pre-printed core 20 (such as, for example, white PVC material) that is, for example, about 25 mil thick. The core 20 is laminated with a transparent material, such as clear PVC material 22, which, by way of example, can be about 1-5 mil thick. The composite of the core 20 and clear PVC material 22 form a so-called “card blank” 25 that can be up to about 30 mils thick. Information 26 a-c is printed on the card blank 25 using a method such as Dye Diffusion Thermal Transfer (“D2T2”) printing (described further in commonly assigned U.S. Pat. No. 6,066,594, which is incorporated hereto by reference in its entirety.) The information 26 a-c can, for example, comprise an indicium or indicia, such as the invariant or nonvarying information common to a large number of identification documents, for example the name and logo of the organization issuing the documents. The information 26 a-c may be formed by any known process capable of forming the indicium on the specific core material used.
  • To protect the information 26 a-c that is printed, an additional layer of overlaminate 24 can be coupled to the card blank 25 and printing 26 a-c using, for example, 1 mil of adhesive (not shown). The overlaminate 24 can be substantially transparent. Materials suitable for forming such protective layers are known to those skilled in the art of making identification documents and any of the conventional materials may be used provided they have sufficient transparency. Examples of usable materials for overlaminates include biaxially oriented polyester or other optically clear durable plastic film.
  • The above-described printing techniques are not the only methods for printing information on data carriers such as ID documents. Laser beams, for example can be used for marking, writing, bar coding, and engraving many different types of materials, including plastics. Lasers have been used, for example, to mark plastic materials to create indicia such as bar codes, date codes, part numbers, batch codes, and company logos. It will be appreciated that laser engraving or marking generally involves a process of inscribing or engraving a document surface with identification marks, characters, text, tactile marks—including text, patterns, designs (such as decorative or security features), photographs, etc.
  • One way to laser mark thermoplastic materials involves irradiating a material, such as a thermoplastic, with a laser beam at a given radiation. The area irradiated by the laser absorbs the laser energy and produces heat which causes a visible discoloration in the thermoplastic. The visible discoloration serves as a “mark” or indicator; it will be appreciated that laser beams can be controlled to form patterns of “marks” that can form images, lines, numbers, letters, patterns, and the like. Depending on the type of laser and the type of material used, various types of marks (e.g., dark marks on light backgrounds, light marks on dark backgrounds, colored marks) can be produced. Some types of thermoplastics, such as polyvinylchloride (PVC), acrylonitrile butadiene styrene (ABS), and polyethylene terephthalate (PET), are capable of absorbing laser energy in their native states. Some materials which are transparent to laser energy in their native state, such as polyethylene, may require the addition of one or more additives to be responsive to laser energy.
  • For additional background, various laser marking and/or engraving techniques are disclosed, e.g., in U.S. Pat. Nos. 6,022,905, 5,298,922, 5,294,774, 5,215,864 and 4,732,410. Each of these patents is herein incorporated by reference. In addition, U.S. Pat. Nos. 4,816,372, 4,894,110, 5,005,872, 5,977,514, and 6,179,338 describe various implementations for using a laser to print information, and these patents are incorporated herein in their entirety.
  • SUMMARY OF THE INVENTION
  • Using laser beams to write or engrave information to ID cards presents a number of advantages over conventional printing. For example, the foaming of the thermoplastic that can occur with some types of laser engraving can be adapted to provide an indicium having a tactile feel, which is a useful authenticator of a data carrier that also can be very difficult to counterfeit or alter. In addition, laser engraving generally does not require the use of ink, which can reduce the cost of consumables used to manufacture an ID card. Laser engraving can also be more durable than ink printing, and more resistant to abrasion (which can be particularly useful if a counterfeiter attempts to “rub off” an indicium on an ID card). The resolution and print quality of laser engraving often can be higher than that of conventional ink-based printing. Laser engraving also can be a more environmentally friendly manufacturing process than printing with ink, especially because solvents and other chemicals often used with ink generally are not used with laser engraving.
  • Despite the advantages of laser engraving, certain limitations still exist. Even when using known laser-enhancing additives, laser marking of some types of materials does not produce an adequate contrast for all applications. Some types of materials, such as silica filled polyolefin, TESLIN core ID documents and TESLIN composite structures (TESLIN is available from PPG Industries, Inc., Pittsburgh, Pa.) using conventional over-laminate materials, are not easily laser engraved. Further, even with use of known laser additives, laser engraving can take too much time and/or too much laser energy to be useful in some manufacturing environments.
  • The inventor of the instant application has found that laser engraving of some types of materials, including materials that are not easily engraved (such as laminated TESLIN core ID documents), can be improved by increasing the sensitivity to laser radiation of a laminate used with the material and/or increasing the sensitivity to laser radiation of a coating applied to the material.
  • One inventive technique disclosed herein improves the material being laser marked or laser engraved by introducing inventive laser enhancing additives to the material. The material can be a laminate, a coating, or an article having a laminate or coating formed thereon. These additives facilitate material sensitivity, greatly improving the ability to laser engrave laminated ID documents. In some embodiments, these additives can also improve the performance of laser engraving even on even those structures (e.g., fused polycarbonate card structures, polyvinylchloride (PVC), polyethylene terephthalate (PET), and acrylonitrile butadiene styrene (ABS)) that can tend to be more easily engraved by laser energy.
  • The inventor has have found that by using the inventive additives described herein, the processing time for polycarbonate ID card structures may be decreased. In addition, user of the laser enhancing additives described herein may enable laser engraving to be accomplished using less laser energy and/or lower levels of laser energy than in known methods. Another inventive technique disclosed herein improves the sensitivity of a material being laser engraved by applying a coating to the material, the coating containing at least one laser enhancing additive as described below. The material can be part of virtually any type of article to be laser marked or laser engraved. For example, in one embodiment the material is a core layer in an identification document.
  • In one embodiment, the additive used to enhance laser engraving comprises a mixture of either copper potassium iodide (CuKI3) or Copper Iodide (CuI) with at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO2Na or R—OSO2Na), and Thioester (e.g., substances containing —SH). This additive can be added to a laminate layer (where the laminate layer itself is to be laser engraved or marked) and/or to a coating (where the surface being coated is to be laser engraved or marked).
  • Advantageously, in one embodiment, the additive comprises an effective amount of copper potassium iodide and zinc sulfide in a host material. The host material can, for example, be a laminate or a coating. The host material also can be another material that is later added to a laminate or coating. The host material can, for example, be a thermoplastic or thermoset.
  • For laminates, the host material (as well as the laminate to which the host material may be added) generally can be any material whose laser engraving/marking properties are improved by the addition of the laser enhancing additive described herein, and it is expected that many materials developed in the future will be able to make use of the additive described herein. In at least one embodiment, the addition of the laser enhancing additive described herein enables the laminate to be laser engraved with a grayscale image.
  • For coatings, in one embodiment, the additive comprises an effective amount of copper potassium iodide and zinc sulfide in a liquid carrier material, which together form a coating that can be applied to an article to be laser engraved. The liquid carrier material can be virtually any known material that can be used as a coating, including resins, polyesters, polycarbonates, vinyls, acrylates, urethanes, and cellulose-base coating. In one embodiment, the liquid carrier material is a material used for coating a surface of a core material (e.g., TESLIN, polycarbonate) of an identification document. The surface being coated generally can be any material (including laminates) whose laser engraving properties are improved by the addition of a coating containing the laser enhancing additive described herein. In at least one embodiment, the addition of the inventive additive to a coating enables the surface to be capable of being engraved with a grayscale image.
  • For transparent laminates and/or coatings, the effective amount of the laser enhancing additive can vary depending on the tolerance for possible reduction in the transparency of the laminate or coating. In one embodiment, for transparent laminates or coating, the effective amount of the additive can range from 0.001% by weight up to about 0.1% by weight (based on the total weight of the material to which the additive is added.).
  • For non-transparent laminates and/or coatings (e.g. colored coatings, colored laminates and/or opaque laminates), the effective amount of the additive can be higher than 1% (e.g., 1%-100%). Those skilled in the art will recognize that the effective amount of the additive for a given use can depend on a number of factors, including the properties of the laminate or coating, the type of laser engraving being performed (e.g., grayscale or non-grayscale), the type of laser used, the desired properties or features of the article or surface being engraved, etc. Advantageously, for at least some transparent laminates and/or coatings used in forming identification documents, the effective amount of the additive is about 0.06% by weight.
  • In another advantageous embodiment, the constituents of the above-described additive can be present in two different layers through which a laser beam can pass. In one example, the copper potassium iodide can be present in a first layer of laminate and the zinc sulfide can be present in a second layer of laminate, where the first and second layers are either adjacent or separated by one or more layers of material (e.g., another laminate or an adhesive) that is transparent to laser radiation. When a laser beam is directed such that it passes through both of the layers, the combined action of the copper potassium iodide and zinc sulfide enable laser engraving to occur in either or both of the layers. In another example, an effective amount of copper potassium iodide can be present in a coating applied to an article and an effective amount of zinc sulfide can be present in a laminate applied over the coating.
  • In another aspect, the invention provides a composition having laser engraving properties, comprising a host material and an effective amount of a laser enhancing additive. The laser enhancing additive comprises a first quantity of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. In one embodiment, the first and second quantities are the same (for example, one part copper iodide and one part barium sulfide). In one embodiment, the first and second quantities are different (for example, three parts copper potassium iodide to one part zinc sulfide, or 2 parts copper iodide to 4 parts thioester). In one embodiment, the composition is markable by at least one of an excimer, Nd:YAG, and C02 laser (including both light pumped and diode pumped Nd:YAG lasers).
  • In one embodiment, the laser enhancing additive is present in the composition in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the composition. In one embodiment, the laser enhancing additive is present in an amount between 0.1 percent and 100 percent by weight based on the total weight of the composition. In one embodiment, the laser enhancing additive is present in an amount that is about 0.06 percent by weight based on the total weight of the composition. In one embodiment, the laser enhancing additive comprises 0.03 percent by weight of at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI) and 0.03 percent by weight of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester, each weight based on the total weight of the composition.
  • In one embodiment, the host material of the composition is be a material that is not sensitive and/or transparent to laser radiation, such as a material that, by itself, is unable to have acceptable gray scale images laser engraved onto it. The host material can be a laminate or a coating. For example, the host material can comprise at least one of a thermosetting material, thermoplastic, polymer, copolymer, polycarbonate, fused polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polyvinyl chloride, polyethylene, thermoplastic resins, engineering thermoplastic, polyurethane, polyamide, polystyrene, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, high impact polystyrene, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprolactone, and combinations thereof.
  • In at least one embodiment, the invention provides an article of manufacture (such as an identification document) capable of being laser engraved with a grayscale image, comprising a core layer, a first layer and a second layer. The core layer has a first surface. The first layer comprises a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI). The second layer comprises a second host material and is oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer. The second host material comprises an effective amount of a second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The first and second layers are operably coupled to each other and at least one of the first and second layers is operably coupled to the first surface of the core layer. In one embodiment, a grayscale image is laser engraved into at least one of the first and second layers.
  • In one embodiment, first layer is substantially transparent and the first laser enhancing additive is present in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the first host material. In one embodiment, the second layer is substantially transparent, and the second laser enhancing additive is present in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the second host material. In one embodiment, a third layer is disposed between the first and second layers; the third layer comprises a material that permits transmission of a laser beam therethrough.
  • In another aspect, the invention provides a method of engraving a material by exposing the material to laser radiation. An effective amount of a laser enhancing additive is added to the material. The laser enhancing additive comprises at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. The material is exposed to laser radiation in a manner that causes the material to be engraved by the laser radiation. In one embodiment, the effective amount of the laser enhancing additive comprises 0.01% to 0.1% by weight of the material, e.g. 0.06% by weight. In one embodiment, the effective amount of the laser enhancing additive comprises 0.1% to 100% by weight of the material. In one embodiment, an indicium is formed in grayscale in at least a portion of the material through the exposure of the portion of the material to laser radiation. In one embodiment, the laser engraved material is used in the manufacture of an identification document.
  • In another embodiment, the invention provides a method of laser engraving a grayscale image on an article having first and second layers. A first effective amount of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI) is added to the first layer. A second effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester is added to the second layer. A laser beam, such as a beam from at least one of an Nd:Yag laser and a C02 laser, is directed so that it passes through at least a portion of the first layer and at least a portion of the second layer to form a grayscale image in at least one of the first and second layers. In one embodiment, the laser beam is directed so that it that it passes through at least a portion of the first layer and at least a portion of the second layer such that the first and second layers become affixed to each other.
  • In at least one embodiment, the invention provides a multilayer identification document, comprising a core layer and a film layer. The film layer overlays at least a portion of the core layer and is affixed to the portion of the core layer. The film layer comprising an additive that comprises an effective amount of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI), and an effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester. In one embodiment, the identification document bears a first indicium thereon, the indicia obtained by exposing the film layer to a laser beam. In one embodiment, the indicia comprises at least one of a gray scale image, photograph, text, tactile text, graphics, information, security pattern, security indicia, and a digital watermark.
  • In another aspect, the invention provides an identification document having improved laser engraving characteristics. The identification document comprises a TESLIN core coated with a coating containing the laser enhancing additive described above. A grayscale image representing variable data (e.g., personalized data) is laser engraved onto the TESLIN core using an Nd:YAG laser. Optionally, a laminate can be affixed to the TESLIN either before laser engraving or after laser engraving. If the laminate is applied before the TESLIN core is laser engraved, the laminate generally will be transparent to laser radiation.
  • Although some companies offer laser engraving document materials, such materials can be prohibitively expensive. At least some embodiments of our invention can overcome at least some of these and other limitations of the prior art. At least some embodiments of our invention offer a less expensive option for laser engraving with improved grayscale engraving, and ease of manufacture, without giving up desired security features.
  • The foregoing and other features and advantages of the present invention will be even more readily apparent from the following Detailed Description, which proceeds with reference to the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • The advantages, features, and aspects of embodiments of the invention will be more fully understood in conjunction with the following detailed description and accompanying drawings, wherein:
  • FIG. 1 is an illustrative example of a prior art identification document;
  • FIG. 2 is an illustrative cross section of the prior art identification document of FIG. 1, taken along the A-A line;
  • FIG. 3 is an illustrative cross-sectional view of an identification document in accordance with a first embodiment of a first aspect of the invention;
  • FIG. 4 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the first aspect of the invention;
  • FIG. 5 is an illustrative cross sectional view of an identification document in accordance with a third embodiment of the first aspect of the invention;
  • FIG. 6 is an illustrative cross sectional view of an identification document in accordance with a fourth embodiment of the first aspect of the invention;
  • FIG. 7 is an illustrative cross sectional view of an identification document in accordance with a first embodiment of a second aspect of the invention;
  • FIG. 8 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the second aspect of the invention;
  • The drawings are not necessarily to scale, emphasis instead generally being placed upon illustrating the principles of the invention. In addition, in the figures, like numbers refer to like elements. Further, throughout this application, laser engraved indicia, information, identification documents, data, etc., may be shown as having a particular cross sectional shape (e.g., rectangular) but that is provided by way of example and illustration only and is not limiting, nor is the shape intended to represent the actual resultant cross sectional shape that occurs during laser engraving or manufacturing of identification documents.
  • DETAILED DESCRIPTION
  • A. Introduction and Definitions
  • In the foregoing discussion, the use of the word “ID document” is broadly defined and intended to include at least all types of ID documents, including (but are not limited to), documents, magnetic disks, credit cards, bank cards, phone cards, stored value cards, prepaid cards, smart cards (e.g., cards that include one more semiconductor chips, such as memory devices, microprocessors, and microcontrollers), contact cards, contactless cards, proximity cards (e.g., radio frequency (RFID) cards), passports, driver's licenses, network access cards, employee badges, debit cards, security cards, visas, immigration documentation, national ID cards, citizenship cards, social security cards and badges, certificates, identification cards or documents, voter registration and/or identification cards, police ID cards, border crossing cards, security clearance badges and cards, gun permits, badges, gift certificates or cards, membership cards or badges, tags, CD's, consumer products, knobs, keyboards, electronic components, etc., or any other suitable items or articles that may record information, images, and/or other data, which may be associated with a function and/or an object or other entity to be identified.
  • Note that, for the purposes of this disclosure, the terms “document,” “card,” “badge” and “documentation” are used interchangeably.
  • In addition, in the foregoing discussion, “identification” includes (but is not limited to) information, decoration, and any other purpose for which an indicia can be placed upon an article in the article's raw, partially prepared, or final state. Also, instead of ID documents, the inventive techniques can be employed with product tags, product packaging, business cards, bags, charts, maps, labels, etc., etc., particularly those items including engraving of an laminate or over-laminate structure. The term ID document thus is broadly defined herein to include these tags, labels, packaging, cards, etc.
  • “Personalization”, “Personalized data” and “variable” data are used interchangeably herein, and refer at least to data, images, and information that are printed at the time of card personalization. Personalized data can, for example, be “personal to” or “specific to” a specific cardholder or group of cardholders. Personalized data can include data that is unique to a specific cardholder (such as biometric information, image information), but is not limited to unique data. Personalized data can include some data, such as birthdate, height, weight, eye color, address, etc., that are personal to a specific cardholder but not necessarily unique to that cardholder (i.e., other cardholders might share the same personal data, such as birthdate). Depending on the application, however, personalized data can also include some types of data that are not different from card to card, but that are still provided at the time of card personalization. For example, a state seal that is laser engraved onto a portion of an overlaminate in an identification document, where the laser engraving occurs during the personalization of the card, could in some instances be considered to be “personalized” information.
  • The terms “laser engraving” and “laser marking” are used interchangeably herein.
  • The terms “indicium” and indicia as used herein cover not only markings suitable for human reading, but also markings intended for machine reading. Especially when intended for machine reading, such an indicium need not be visible to the human eye, but may be in the form of a marking visible only under infra-red, ultra-violet or other non-visible radiation. Thus, in at least some embodiments of the invention, an indicium formed on any layer in an identification document (e.g., the core layer) may be partially or wholly in the form of a marking visible only under non-visible radiation. Markings comprising, for example, a visible “dummy” image superposed over a non-visible “real” image intended to be machine read may also be used.
  • “Laminate” and “overlaminate” include (but are not limited to) film and sheet products. Laminates usable with at least some embodiments of the invention include those which contain substantially transparent polymers and/or substantially transparent adhesives, or which have substantially transparent polymers and/or substantially transparent adhesives as a part of their structure, e.g., as an extruded feature. Examples of usable laminates include at least polyester, polycarbonate, polystyrene, cellulose ester, polyolefin, polysulfone, or polyamide. Laminates can be made using either an amorphous or biaxially oriented polymer as well. The laminate can comprise a plurality of separate laminate layers, for example a boundary layer and/or a film layer.
  • The degree of transparency of the laminate can, for example, be dictated by the information contained within the identification document, the particular colors and/or security features used, etc. The thickness of the laminate layers is not critical, although in some embodiments it may be preferred that the thickness of a laminate layer be about 1-20 mils. Lamination of any laminate layer(s) to any other layer of material (e.g., a core layer) can be accomplished using any conventional lamination process, and such processes are will-known to those skilled in the production of articles such as identification documents. Of course, the types and structures of the laminates described herein are provided only by way of example, those skilled in the art will appreciated that many different types of laminates are usable in accordance with the invention.
  • For example, in ID documents, a laminate can provide a protective covering for the printed substrates and provides a level of protection against unauthorized tampering (e.g., a laminate would have to be removed to alter the printed information and then subsequently replaced after the alteration.). Various lamination processes are disclosed in assignee's U.S. Pat. Nos. 5,783,024, 6,007,660, 6,066,594, and 6,159,327. Other lamination processes are disclosed, e.g., in U.S. Pat. Nos. 6,283,188 and 6,003,581. Each of these U.S. patents is herein incorporated by reference.
  • The material(s) from which a laminate is made may be transparent, but need not be. Laminates can include synthetic resin-impregnated or coated base materials composed of successive layers of material, bonded together via heat, pressure, and/or adhesive. Laminates also includes security laminates, such as a transparent laminate material with proprietary security technology features and processes, which protects documents of value from counterfeiting, data alteration, photo substitution, duplication (including color photocopying), and simulation by use of materials and technologies that are commonly available. Laminates also can include thermosetting materials, such as epoxy.
  • For purposes of illustration, the following description will proceed with reference to ID document structures (e.g., TESLIN-core, multi-layered ID documents) and fused polycarbonate structures. It should be appreciated, however, that the present invention is not so limited. Indeed, as those skilled in the art will appreciate, the inventive techniques can be applied to many other structures formed in many different ways to improve their laser engraving characteristics. Generally, the invention has applicability for virtually any product which is to be laser engraved, especially products being engraved with grayscale images. For example, in at least some embodiments, the invention is usable with virtually any product which is to be laser engraved or marked, especially articles to which a laminate and/or coating is applied, including articles formed from paper, wood, cardboard, paperboard, glass, metal, plastic, fabric, ceramic, rubber, along with many man-made materials, such as microporous materials, single phase materials, two phase materials, coated paper, synthetic paper (e.g., TYVEC, manufactured by Dupont Corp of Wilmington, Del.), foamed polypropylene film (including calcium carbonate foamed polypropylene film), plastic, polyolefin, polyester, polyethylenetelphthalate (PET), PET-G, PET-F, and polyvinyl chloride (PVC), and combinations thereof.
  • In addition, at least one embodiment of the invention relates to virtually any article formed from, laminated with, or at least partially covered by a material that not sufficiently responsive to laser radiation to form a desired indicium (e.g., a grayscale image) thereon, but which is rendered more responsive to laser radiation, at least to a sufficient degree to enable its surface to be marked as desired with a laser beam, by adding the inventive laser enhancing additive to the material itself or to another material (e.g., a coating or laminate) that is substantially adjacent to the material.
  • B. Laser Engraving
  • It is often desirable to mark a portion of a structure, such as a multi-layered structure (including after lamination), such as an ID document, with text, information, graphics, logos, security indicia, security features, marks, images and/or photographs. It would be advantageous if techniques were available to enable laser engraving to produce some or all of these features, especially gray scale and/or color images and photographs.
  • In some instances, however, some parts of a multi-layered ID document structure, (for example, a structure that includes polyester or polycarbonate laminate on a core such as TESLIN) can be non-conducive to acceptable engraving of specific types of information. For example, some materials can be laser engraved (using, for example, a C02 laser) with text information (e.g., dark on light), but cannot be satisfactorily laser engraved with usable grayscale information (e.g., grayscale information conveying up to 256 shades of gray), such as images or photographs, or full color information.
  • Other materials are difficult to laser engrave even with text information. For example, some materials, such as silica filled polyolefin, TESLIN, polycarbonate and fused polycarbonate, polyethylene, polypropylene (PPRO), polystyrene, polyolefin, and copolymers are not very sensitive to laser radiation and thus are not especially conducive to laser engraving. Attempts to laser engrave structures that include such non-sensitive and non-conducive materials can sometimes result in engraving that appears too faint to be usable to convey information visually (although the engraving might be useful to provide a tactile feel to the structure). Such a multi-layered structure lacks the sensitivity required for favorable laser engraving. The ability to provide gray scale images on an identification document using a laser, in accordance with the invention, can be advantageous because it can provide increased security of the identification document. In addition, it may be possible to use the invention incorporate additional security features (such as digital watermarks) into the laser engraved grayscale image.
  • C. First Aspect of the Invention
  • C.1 Features
  • In a first aspect, one embodiment of the invention involves sensitizing at least one of the layers in a multi-layered structure, such as at least one laminate layer, to help to overcome the problem of the laminate material not being responsive to laser engraving and/or not being responsive enough to be capable of having grayscale images laser engraved thereon. We have found that the quality of laser engraving can be improved, while reducing engraving time, through over-laminate sensitization using one or more of the inventive formulations described herein. In one implementation of this embodiment, a layer of laminate is modified by adding an effective amount of one or more laser sensitive additives to the laminate material. We also have found that the laser sensitive additives described herein can be divided over two or more layers to provide improved laser engraving performance. Moreover (as described later herein in the second and third aspects of the invention), we have found that the laser sensitive additives also will improve laser engraving if they are present in a coating applied to a material to be engraved.
  • A least one embodiment of the first aspect of the invention is based on the surprising discovery that the process of laser engraving of materials such as laminates is improved and enhanced by adding to the laminate a first effective amount of a first composition, the first composition being at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) together with a second effective amount of a second composition, the second composition being at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO2Na or R—OSO2Na), and Thioester (e.g., substances containing —SH). The combination of CuI or CuKI3 together with at least one of ZnS, BaS, alkyl sulfonate, and thioester will hereinafter be referred to as the “inventive laser enhancing additive”. The components of the inventive laser enhancing additive, namely the component comprising at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) and the component comprising at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO2Na or R—OSO2Na), and Thioester, will sometimes be referred to as the “inventive laser enhancing additives”).
  • As those skilled in the art will appreciate, the effective amounts of the first and second compositions can vary depending on the material to which the inventive laser enhancing additive is added and on the laser engraving technique being employed. In at least one embodiment, the inventive laser enhancing additive includes equivalent amounts of the first and second compositions. In at least one embodiment, the inventive laser enhancing additive includes more of the second composition than the first composition. In at least one embodiment, the inventive laser enhancing additive includes more of the first composition than the second composition.
  • The exact nature of the mechanism by which the inventive laser enhancing additive works is not yet established. It is possible that the inventive laser enhancing additive increases the molecular activity within the laminate when the heat from the laser is applied, enabling the laminate to respond faster and/or more intensely to the laser energy. It also is possible that the additive increases the opacity of the laminate, enabling it to better respond to laser energy. It also is possible that the components of the inventive laser enhancing additive react with each other and/or with the host material to form black species within the host material.
  • Using the inventive laser enhancing additive, high quality images and other engravings can be formed on articles such as multi-layered ID documents at acceptable throughput rates by modifying the materials being engraved by adding the inventive laser enhancing additives to the material (or by coating the material with a coating containing the inventive laser enhancing additive, as discussed further in the second aspect of the invention). The inventive laser enhancing additive can not only make a material that is non-sensitive to laser radiation more sensitive to laser radiation, but also can reduce the laser engraving time as well. In addition, because the inventive laser enhancing additive can improve the responsiveness of the material being laser engraved to laser energy, high definition images, such as gray scale images (which can be used on identification documents), can be created with the laser engraving process.
  • In at least one embodiment, use of any of the above laser enhancement formulations improves the quality of the laser engraving by increasing the contrast,(including at least dark colors on light backgrounds) that can occur when using a laser having a given power level. In at least some embodiments, the increased contrast resulting from use of one of the above-described laser enhancing additives may enable the laser engraving to be accomplished using a lower-power laser than would need to be used without user of the laser enhancing additive. It at least some embodiments, the increased sensitivity resulting from use of one of the above-described laser enhancing additives may reduce the time necessary to accomplish the laser engraving.
  • In accordance with at least some embodiments of the first aspect of the invention, any of the above-described inventive laser enhancing additives can be added to virtually any material (including all known thermoplastics and thermosets) to enhance the process of laser marking and/or laser engraving of either the material to which the inventive laser enhancing additive is added or any material disposed substantially adjacent thereto. Advantageously, the addition of the inventive laser enhancing additive enables whatever material(s) it has been added to be laser engraved with a grayscale image.
  • In accordance with another embodiment of the first aspect of the invention, a first part of the inventive laser enhancing additive (i.e., a part that contains an effective amount of CuI or CuKI3 ) can be added to a first layer of laminate and a second part of the inventive laser enhancing additive (i.e., part that contains an effective amount at least one of ZnS, BaS, alkyl sulfonate, and thioester ) can be added to a second layer of laminate, wherein a single laser beam passes through both layers and enables the laser engraving of either or both layers. In accordance with still another embodiment of the first aspect invention, the inventive laser enhancing additive can be added to a core material that is laminated with a material that is transparent to laser radiation, wherein the core material also can be laser engraved.
  • In at least one advantageous embodiment, the inventive laser enhancing additive is added to core, laminate and/or over laminate materials used in the manufacture of identification documents, to improve the process of laser engraving or marking of the identification documents and to enable laser engraving of a grayscale image on the identification documents.
  • Note that the laser enhancing additives in accordance with the invention are usable for both materials that usually are not sensitive to laser radiation as well as materials that are already sensitive to laser radiation. The inventive laser enhancing additive can be present in a material, such as a laminate, at the same time that other compositions (e.g., other laser enhancing or absorbing additives, reinforcing fillers, antioxidants, flame retardants, stabilizers, plasticizers, lubricants, dispersants, and the like) are present in the same material and/or a separate layer of material
  • Illustrative examples of laminate materials to which the inventive laser enhancing additive may be added include (but are not limited to) polyester, polycarbonate (PC), fused polycarbonate, polyvinyl chloride (PVC), polyethylene, thermosets, thermoplastic and thermoplastic resins (including those that foam when heated), engineering thermoplastics (ETP), polyurethane, polyamides, expanded polypropylene (EPP), polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC and ABS/PC products, high impact polystyrene (HIPS), polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate (PBS), acetal copolymer (POM), and polyetherimide (PEI), polymer, copolymer, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polystyrene, polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprolactone, as well as virtually any known plastic or polymer. Of course, it will be appreciated that embodiments of the invention have applicability for the laser engraving and/or marking of plastic materials used to make many different articles formed by virtually any known method, including molding and extruding.
  • In at least some embodiments, the resultant concentration of the inventive laser enhancing additive in the laminate, by weight, ranges from 0.001% to 0.1% by weight. In at least some embodiments, the inventive laser enhancing additive is added at larger concentrations (e.g., from 0.1% to 100%). At concentrations larger than 0.1%, the inventive laser enhancing additive can still be used to enhance laser marking or engraving, but at possible sacrifice of some of the transparency of the laminating material (if, in fact, the laminating material is substantially transparent or translucent to begin with).
  • Advantageously, in at least one embodiment, the laser enhancing additive is about 0.06% by weight in the laminate. In another advantageous embodiment, the 0.06% by weight includes 0.03% by weight of at least one of CuI or CuKI3 and 0.03% by weight of at least one of ZnS, BaS, alkyl sulfonate, and thioester. Of course, those skilled in the art will appreciate that other concentration ranges for the laser enhancing formulations may be usable, especially when using opaque materials and colored materials. In addition, it will be appreciated that the proportions of the at least one of CuI or CuKI3 and of the at least one of ZnS, BaS, alkyl sulfonate, and thioester also can vary.
  • The concentration of the inventive laser enhancing additive that is usable with a given laminate is at least in part dependent on the properties of the laminate and the ultimate use, durability, environmental conditions, etc., to which the laminate is subject. It is possible that higher concentrations of the laser enhancing formulations in the laminate may affect one or more properties of the laminate, such as transparency, durability, malleability, opacity, rigidity, etc. Of course, appropriate quantities of the additives can be determined for a particular over-laminate application without undue experimentation. Additional factors may include engraving time and process, base over-laminate material or composition, and desired engraving quality.
  • It is contemplated that the inventive laser enhancing additive can be added to a laminate that is affixed (e.g., by adhesive, lamination, chemical reaction, etc.) to virtually any product, to enable the laminate to be laser engraved, especially with a grayscale image, thereby producing (especially if the laminate is substantially transparent or translucent) a laser engraving or marking on the laminate affixed to the article. Accordingly, we believe that the inventive laser enhancing laminate has applicability to the manufacture many different articles that can be laminated, including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, and toys. Further, we contemplate that entire articles of manufacture could be formed wholly or partially using a material that contains the inventive laser enhancing additive and then laser engraved or marked.
  • C.2 Preparation/Manufacture
  • The inventive laser enhancing additive can be added to the laminate in many different ways. The following technique describes the preparation and addition of the inventive laser enhancing additive to the laminate in accordance with one embodiment of the first aspect of the invention. By way of example only, the technique will be described in connection with an embodiment wherein the laminate comprises polycarbonate and the inventive laser enhancing additive comprises CuKI3 and ZnS, but illustration of this particular formulation should not be viewed as limiting.
  • In this example, preparation of the inventive laser enhancing additive can be accomplished by using a twin screw extruder to create a highly concentrated polymer blend (so-called “masterbatch”) of the inventive laser enhancing additive. The masterbatch is created by combining the desired host material (e.g., polycarbonate) with the inventive laser enhancing additive, (e.g., ZnS and CuKI3). The host material and the inventive laser enhancing additive are dried prior to blending to minimize any degradation of each of the components. The following are illustrative examples of inventive laser enhancing additive preparations that can be utilized in at least some embodiments of the invention:
      • Masterbatching the inventive laser enhancing additive together in the same material (e.g., polycarbonate) as the final film material (e.g., polycarbonate) of the laminate.
      • Masterbatching the inventive laser enhancing additive together in a different material (e.g., polystryrene) than the final film material (e.g., polycarbonate) of the laminate.
      • Masterbatching the inventive laser enhancing additive separately in the same material (e.g., polycarbonate) as the final film material (e.g., polycarbonate) of the laminate
      • Masterbatching the inventive laser enhancing additive separately in a different material (e.g., polystyrene) than the final film material (e.g., polycarbonate) of the laminate.
  • The above masterbatch formulations are taken and drawn down to the desired concentration using a single screw extruder to form a monolayer film. To reduce costs, a colayer can be made whereby sensitized material (i.e., material to which the inventive laser enhancing additive is added) is extruded against nonsensitive material. In one embodiment, the optimum concentration for marking of polycarbonate and maximizing optical properties is 0.06% by weight. Concentrations can be used up to 0.1% by weight; concentrations higher than 0.1% may cause visible reductions of the transparency of transparent materials. In one embodiment, more than one-of the previously described inventive laser-enhancing additives can be used as an additive (e.g., ZnS and CuKI3 along with BaS and CuI), and other known laser-enhancing additives can also be combined with one or more of the previously described inventive laser-enhancing additives in the above techniques.
  • Of course, those skilled in the art will appreciate that the above examples of masterbatch formulations and materials are provided by way of example and are not limiting. For example, those skilled in the art will readily understand how the inventive laser enhancing additive can be adapted to work with acrylics, acetates, polystyrenes, urethanes, polyesters (aromatic and aliphatic), polyether nitrides, ABS and polyvinyl chloride, as well as the other laminate materials previously described.
  • C.3 Illustrative Examples
  • After the film for the laminate is made, various known processes can be used to adapt it for use with the article being laser engraved or marked. In the example of an ID document to be laser engraved or marked, the following are illustrative exemplary embodiments for constructing an ID document using a film and/or laminate containing the inventive laser enhancing additive.
  • FIG. 3 is an illustrative cross-sectional view of an ID document 10 in accordance with a first embodiment of the first aspect of the invention. In this first embodiment, an inventive ID document 10 preferably includes a multi-layered structure, as shown in FIG. 3. For purposes of illustration, however, the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 3 differs from the prior art. The identification document 10 comprises a layer of core material 50 and at least one layer of a first laminate 52 to which the inventive laser enhancing additive has been added ( a laminate to which the inventive laser enhancing additive is added will also be referred to herein as the “inventive laminate”). A laminate layer is preferably added to the front and back surface of the core to form the multi-layer structure.
  • In this example, the core material 50 is 10 mils of a substantially opaque white laminate core, such as a TESLIN-based core. Prior to lamination, the core material 50 can be pre-printed to include an indicium 54A such as fixed or variable information or data. The pre-printing can include screen-printing, offset printing, laser or ink-jet printing, flexography printing, or the like. “Fixed” information may include non-individual dependent information, such as department or company information, state information, etc., etc. Variable information, or information that is unique to the ID document holder, can be printed, for example, via a color laser XEROGRAPHY process.
  • The fixed and/or variable information can also include one or more built in security features, as well, to help reduce identity fraud. For example, in one embodiment of the invention, portions of the ID document 10, including either or both of the core material 50 and/or the laminate 52, can include a security feature such as a security indicia or security pattern. The security pattern can be applied in an ordered arrangement having a tightly-printed pattern, i.e., having a plurality of finely-divided printed and unprinted areas in close proximity to one another. A tightly-printed pattern may, for example, appear as an often-repeated logo or design or a fine-line printed security pattern such is used in the printing of banknote paper, stock certificates and like and may take the form of filigree, guilloche or other fine-line printing. U.S. Pat. No. 4,653,775 provides an example of such security printing and is hereby incorporated by reference. Note that the laser engraving facilitated by the invention can be used to print a security indicia or security pattern.
  • In addition, the laser engraving facilitated by the invention can be used to add a digital watermark to any indicia printed (whether conventionally or by laser engraving) on any layer of the ID document 10. Digital watermarking is a process for modifying physical or electronic media to embed a machine-readable code therein. The media may be modified such that the embedded code is imperceptible or nearly imperceptible to the user, yet may be detected through an automated detection process. The code may be embedded, e.g., in a photograph, text, graphic, image, substrate or laminate texture, and/or a background pattern or tint of the photo-identification document. The code can even be conveyed through ultraviolet or infrared inks and dyes.
  • Digital watermarking systems typically have two primary components: an encoder that embeds the digital watermark in a host media signal, and a decoder that detects and reads the embedded digital watermark from a signal suspected of containing a digital watermark. The encoder embeds a digital watermark by altering a host media signal. To illustrate, if the host media signal includes a photograph, the digital watermark can be embedded in the photograph, and the embedded photograph can be printed on a photo-identification document. The decoding component analyzes a suspect signal to detect whether a digital watermark is present. In applications where the digital watermark encodes information (e.g., a unique identifier), the decoding component extracts this information from the detected digital watermark.
  • Several particular digital watermarking techniques have been developed. The reader is presumed to be familiar with the literature in this field. Particular techniques for embedding and detecting imperceptible watermarks in media are detailed, e.g., in Digimarc's co-pending U.S. patent application Ser. No. 09/503,881 and U.S. patent application Ser. No. 6,122,403. Techniques for embedding digital watermarks in identification documents are even further detailed, e.g., in Digimarc's co-pending U.S. patent application Ser. Nos. 10/094,593, filed Mar. 6, 2002, and Ser. No. 10/170,223, filed Jun. 10, 2002, co-pending U.S. Provisional Patent Application No. 60/358,321, filed Feb. 19, 2002, and U.S. Pat. No. 5,841,886. Each of the above-mentioned U.S. patent documents is herein incorporated by reference. Additionally, it is noted that the invention encompasses ID documents including more or less features than the illustrated ID document 10.
  • Referring again to FIG. 3, after printing, the core material 50 is laminated on both sides with 10 mils of the first laminate 52 that has been sensitized to laser energy by the addition of the inventive laser enhancing additive. In this example, the first laminate 52 contains ZnS and CuKI3 additives in a base laminate material such as polyester or polycarbonate. In one implementation of this embodiment, the front and back first laminates 52 can be laminated using an adhesive (not visible in FIG. 3) such as co-polyester or olefin containing adhesive. Other adhesives usable in accordance with this embodiment of the invention include polyester, polyester urethane, polyether urethane or polyolefin hot melt or ultraviolet or thermally cured adhesive. The multi-layered structure is formed during a lamination process, in which adjustments to the processing time, temperature and pressure can be varied to optimize laminations.
  • In at least some embodiments of the first aspect of the invention, usable laminates usable include those which contain substantially transparent polymers and/or substantially transparent adhesives, or which have substantially transparent polymers and/or substantially transparent adhesives as a part of their structure, e.g., as an extruded feature. The first laminate 52 can comprise a plurality of separate laminate layers, for example a boundary layer and/or a film layer. The first laminate 52 can comprise an optically clear durable plastic film, such as amorphous or biaxially oriented polyester. In at least some embodiments, the laminate need not be substantially transparent, but can be colored or opaque, so long as a grayscale image can be laser engraved onto it. Of course, the types and structures of the laminates described herein are provided only by way of example, those skilled in the art will appreciated that many different types of laminates are usable in accordance with the invention.
  • In at least some embodiments, the first laminate layers 52 can provide additional security features for the identification document 10. For example, the first laminate 52 may include a low cohesivity polymeric layer, an optically variable ink, an image printed in an ink which is readable in the infra-red or ultraviolet but is invisible in normal white light, an image printed in a fluorescent or phosphorescent ink, or any other available security feature which protects the document against tampering or counterfeiting, and which does not compromise the ability of the first laminate 52 to be laser engraved.
  • In at least one embodiment (not shown), the first laminate is formed into a pouch into which the core material 50 slips. With a pouch, methods such as heat, pressure, adhesives, and the like, are usable to bond the core material 50 to the first laminate 52 formed into a pouch. Those skilled in the art will appreciate that many known structures and configurations for laminating are usable with the invention.
  • Referring again to FIG. 3, adhesive can be applied to the first laminate 52 via methods such as solvent coating, casting, or hot melt extrusion. The adhesive may also be coated, cast or extruded onto a surface of the core material 50. The first laminate 52 can then be heat laminated to the core material 50 to form a secure bond. Additional processes that can be used to form the first laminate 52 onto the core material include injection molding or extrusion of a hot melt onto the core material 50. Those skilled in the art will appreciate that virtually any known method can be used to couple the first laminate 52 to the core material 50. For example, techniques such as standard heat and pressure, pressure only, chemical fusion via solvent blending, ultraviolet (UV) methodologies, and/or electron beam (EB) methodologies can be used to laminate the first laminate 52 to the core material 50.
  • When first laminate 52 is appropriately coupled to the core material 50, the ID document 10 is ready for laser engraving. In at least one embodiment, the laser engraving is used to personalize the ID document. In at least one embodiment, a usable laser for engraving is a neodymium:yttrium aluminum garnet (Nd:YAG) laser using both 3 Watt (W) (103D) and 10 W (Powerline E) power outputs (a laser that is usable with at least one embodiment of the invention can be purchased from Rofin Baasel Lasertech of Boxborough, Mass.). The 10 W laser of this device uses a true grey scale marking software compared to the 3W which does not. In at least one embodiment, the Nd:YAG laser emits light at a wavelength of about 1064 nanometers (nm).
  • Because the inventive laser enhancing additive improves the responsiveness of the first laminate 52 to the laser, the time to laser engrave a given area can be decreased as compare to the time to mark a given area in a laminate that does not have the inventive laser enhancing additive, when using the same laser”. In addition, the improvement in responsiveness can enable grayscale images, such as images with up to 256 different shades of gray, to be laser engraved into the laminate 52, especially when an Nd:Yag laser (including lamp pumped YAG lasers, diode pumped Nd:Yag lasers, and light pumped Nd:Yag lasers) is used. Those skilled in the art will appreciate that the effective amount of the inventive laser enhancing additive used and the material in which it is used can be adapted to achieve similar improvements in laser engraving when using other types of lasers, such as, excimer lasers and C02 lasers.
  • In addition, use of the inventive laser enhancing additive can improve the laser engraving of so-called “vector information” of an identification document. Vector information is non-captured information (such as logos) in an identification document and generally does not include so-called “pixel” information, which is information that is captured, such as signature images and/or photographic images. When the inventive laser enhancing additive is added to a material being laser engraved with vector information, it is possible to sufficiently sensitize the material such that the vector information can be engraved to achieve the “tactile feel” known in the art of laser engraving.
  • Referring again to FIG. 3, one or more indicia 54B-54F, such as variable information (e.g., birth date, address, biometric information, etc.) is engraved into the over laminate layer 52 through a focused laser beam. In one embodiment, the laser used is an Nd:YAG laser; other suitable lasers (e.g., C02) can, of course, be similarly employed. As described previously, the area irradiated by the laser absorbs the laser energy and produces heat which causes a visible discoloration in the first laminate 52. The visible discoloration serves as a “mark” or indicator. With some laminates and lasers, the heat from the laser beam causes a foaming as shown in indicia 54D; the foaming can create a raised area in the first laminate 52 that provides a tactile feel when touched. The indicia 54B-F can comprise virtually any type of information, including photographs, data, images, fingerprints, and text. Although not apparent in the cross sectional view of FIG. 3, our testing has shown that the indicia 54B-F can comprise a usable grayscale image (by usable, it is at least meant that image can be used for security purposes, such as identification or authentication). In experiments, the inventor was able to engrave an acceptable gray scale photograph, non-tactile text and tactile text into the laminate layer 52.
  • As an example, we compared laminate to which the inventive laser enhancing additive was added (in this test, ZnS and CuKI3 ) additives against a commercially available polycarbonate laminate, manufactured by the Bayer Polymer Division. We engraved a 0.75-inch by 1.0-inch photograph at 750 dpi in each of the Bayer material and our inventive over-laminate containing the inventive laser enhancing additive. Using the same laser at the same power for each (a 3 W 103D laser, as described above), we found that the Bayer material required approximately 40 seconds to engrave an acceptable gray scale photograph. In comparison, the laminate to which the inventive laser enhancing additive was added needed only approximately 20 seconds to engrave an acceptable gray scale photograph by adjusting the frequency of the laser.
  • Although the embodiment of FIG. 3 illustrates that the first laminate 52 that contains the inventive laser enhancing additive overlays substantially all of the core material 50, in at least some embodiments of the invention, the inventive laser enhancing additive can be added to a laminate that forms merely a portion of the laminate covering a core material 50.
  • For example, FIG. 4 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the first aspect of the invention. In the embodiment of FIG. 4, the ID document 10 preferably includes a multi-layered structure. For purposes of illustration, however, the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 4 differs from the prior art. In the embodiment of FIG. 4, the portion of first laminate 52 containing the inventive laser enhancing additive is disposed at least partially within a layer of another material, such as so-called “plain” laminate 56 (i.e., laminate that does not contain the inventive laser enhancing additive). When a laser beam is applied to the first laminate 52, a third indicium 54G is formed. The plain laminate 56 may comprise a material that is inherently sensitive to laser radiation or can be a material that is insensitive to laser radiation. Note also that the layer of other material in which the first laminate 52 containing the inventive laser enhancing additive is disposed need not even be a laminate at all. Thus, in some articles, the surface of the article can include a portion or “window” of first laminate 52 containing the inventive laser enhancing additive, whereas the rest of the surface is some other material (e.g., ceramic). This configuration may be applicable, for example, in the marking of electronic components and/or devices.
  • FIG. 5 is an illustrative cross sectional view of an identification document 10 in accordance with a third embodiment of the first aspect of the invention. In the embodiment of FIG. 5, the ID document 10 preferably includes a multi-layered structure. For purposes of illustration, however, the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 5 differs from the prior art. In the embodiment of FIG. 5, a first portion of the inventive laser enhancing additive is disposed in a first laminate layer 52 and a second portion of the inventive laser enhancing additive is disposed in a second laminate layer 55. Specifically, in this embodiment, the first laminate layer 52 contains an effective amount of at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) and the second laminate layer 55 contains an effective amount of at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester. The first laminate layer 52 and second laminate layer 55 are constructed and arranged so that a laser beam can pass through both the first laminate layer 52 and the second laminate layer 55, to form indicia 66, 64 in one or both of the first and second laminate layers 52, 55, respectively. As those skilled in the art will appreciate, whether an indicia is formed in a given laminate layer depends on the particular type of laser used the manner in which the laser is used (e.g., pumped), and the duration of the application of laser energy.
  • It should be understood that although the example of FIG. 5 shows that the first laminate layer 52 contains the effective amount of at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) and the second laminate layer 55 contains the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, the positions of the two compounds in the respective first and second layers could be reversed. That is, the first laminate layer 52 could contain the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, and the second laminate layer 55 could contain the effective amount of copper potassium iodide (CuKI3) or copper iodide (CuI).
  • Referring again to FIG. 5, the ID document 10 further comprises a layer of core material 50 (in this example, the layer of core material is 10-20 mils thick) to which the first laminate 52 is laminated on either side. The core material 50 is printed with pre-printing 70 on its outer surface. In one embodiment, the pre-printing 70 is nonvariable information, such as organization name, logo, and the like. The first laminate layer 52 can also be printed with printed information 72 using a technique such as dye diffusion thermal transfer. Also, in FIG. 5, a third layer 57 is disposed between the first laminate layer 52 and the second laminate layer 55. The third layer 57 is a material (for example, a laminate or an adhesive) that is transparent to laser radiation and permits a laser beam directed at the second layer 55 to penetrate, at least partially to the first layer 52.
  • In at least one embodiment, the first laminate 52 can be made from a material that is inherently (i.e., even without the addition of the inventive laser enhancing additive or any portion thereof) more responsive to laser radiation than is the second laminate 55. In this embodiment, when a laser beam is directed through the second and first laminate layers 55, 52, the area in the first laminate 52 that is irradiated can “bubble up” to the second layer 55, to form a bond 68 between the first laminate 52, second laminate 55, and (optionally) the third layer.
  • In one embodiment, the ID document 10 of the embodiment of FIG. 5 is a multi-layer fused polycarbonate structure used as an ID document. The multi-layered structure preferably includes a core and at least a top and bottom over-laminate. The core material 50 may include a titanium dioxide (TiO2) filled polycarbonate (PC) film, which generally has a whitish color. The core material 50 can have pre printed information 70 thereon prior to the fusing process. Examples of acceptable pre-printing processes include screen-printing, offset printing, laser or ink-jet printing, flexography printing, and the like.
  • The core material 50 and first laminate 52 are fused (e.g., using heat and pressure, such as by a platen press) together to form a structure 53, which helps to deter delaminating attempts. The structure 53 in this example is a solid PC ID document 10. Adjusting the time, temperature and pressure can help to bond the first laminate 52 to the polycarbonate core material 50. The second laminate 55 can be an overlaminate material.
  • In one experiment, we compared the engraving properties of an inventive fused polycarbonate structure, including a titanium dioxide filled polycarbonate core and polycarbonate over-laminates with ZnS and CuKI3 additives, against a Muhlbauer polycarbonate card. The comparison involved engraving a 0.75 by 1.0 inch photograph at 750 dpi. The Muhlbauer engraving required between 20 and 25 seconds, while the inventive fused polycarbonate structure required 11-15 seconds engraving time to achieve similar acceptable gray scale tones by adjusting the frequency of the laser.
  • The inventive laser enhancing additive also can be used in a laminate that has one or more additional laminate layers bonded over it. For example, FIG. 6 is an illustrative cross sectional view of an identification document in accordance with a fourth embodiment of the invention. In the embodiment of FIG. 6, the ID document 10 preferably includes a multi-layered structure. For purposes of illustration, however, the ID document 10 may have a front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 6 differs from the prior art. In FIG. 6, the ID card 10 includes a core material 50 (shown for illustrative purposes only to be about 10 mils thick) to which is laminated a layer (shown for illustrative purposes only to be about 5 mils thick) of first laminate 52 to which the inventive laser enhancing additive is added. Over the first laminate 52 is a layer of second laminate 58 (shown for illustrative purposes to be about 5 mils thick), which in this embodiment is made from a material that is not sensitive to laser radiation. In this example, the second laminate 58 is a transparent material. A laser is used to engrave the first laminate 52 with indicia 54I-54J. The total thickness of the ID document 10 of FIG. 6 is about 30 mils, which, in at least one embodiment, allows the architecture of the ID document 10 to meet and/or exceed American Association of Motor Vehicle Administrators (AAMVA), American National Standards Institute (ANSI). The total thickness of the ID document 10 of FIG. 6 can also be adapted to meet and International Organization for Standardization (ISO) specifications for identification documents such as ID Cards. It will be appreciated that many other thicknesses of layers are usable to make an ID document that satisfies one or more of the AAMVA, ANSI, and ISO requirements. For example, in FIG. 6, the core material 50 could be 20 mils thick, the first laminate 52 could be 2 mils thick, and the second laminate 58 could be 3 mils thick.
  • Although FIG. 6 only illustrates a single layer of laminate over the first laminate 52 (which has added to it the inventive laser enhancing additive), it will be appreciated that many more layers can be added over the first laminate 52, so long as the laser being used is able to reach the first laminate 52.
  • We have found that the inventive laminates described herein may offer one or more advantages. For example, using the inventive laminates can enable the inventive laminates to be laser marked or engraved with usable grayscale images. In addition, using the inventive laminates can enable faster laser engraving or marking at lower laser power levels. Further, the laser engraving that is possible using the inventive laminates is durable, abrasion resistant, and environmentally friendly.
  • C.4 Additional Embodiments of First Aspect of the Invention
  • We anticipate that at least the following combinations, and others like them, can be useful embodiments of the first aspect of the invention:
      • 1. A composition having laser engraving properties, comprising:
      • a host material; and
      • an effective amount of a laser enhancing additive, the laser enhancing additive comprising:
        • a first quantity of at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
      • 2. The composition as recited in 1 above, wherein the laser enhancing additive is present in an amount from about 0.001 to 100 percent by weight based on the total weight of the composition.
      • 3. The composition as recited in 1 above wherein host material is substantially transparent and the laser enhancing additive is present in an amount from about 0.001 to 0.1 percent by weight based on the total weight of the composition.
      • 4. The composition as recited in 1 above wherein the laser enhancing additive is present in an amount that is about 0.06 percent by weight based on the total weight of the composition.
      • 5. The composition as recited in 4 above, wherein the first and second quantities each comprise about 0.03 percent by weight based on the total weight of the composition.
      • 6. The composition as recited in 1 above wherein the first quantity and the second quantity are the same.
      • 7. The composition as recited in 1 above wherein the first quantity is greater than the second quantity.
      • 8. The composition as recited in 1 above wherein the first quantity is less than the second quantity.
      • 9. The composition as recited in 1 above wherein the composition is laser engraveable by at least one of a diode pumped Nd:Yag laser, light pumped Nd:Yag laser, C02 laser and excimer laser.
      • 10. The composition as recited in 8 above wherein the composition is laser engraveable to form a grayscale image.
      • 11. The composition as recited in 1 above wherein the host material comprises a material that is not, by itself, sufficiently sensitive to laser radiation to permit gray scale images to be laser engraved in the host material.
      • 12. The composition as recited in 1 above wherein the host material comprises at least one material selected from the group consisting of thermosetting material, thermoplastic, polymer, copolymer, polycarbonate, fused polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polyvinyl chloride, polyethylene, thermoplastic resins, engineering thermoplastic, polyurethane, polyamide, polystyrene, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, high impact polystyrene, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprolactone.
      • 13. An article of manufacture capable of being laser engraved with a grayscale image, comprising:
      • a core layer having a first surface;
      • a first layer comprising a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
      • a second layer comprising a second host material, the second layer oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer, the second host material comprising an effective amount of a second laser enhancing additive, the second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester;
      • wherein the first and second layers are operably coupled to each other and at least one of the first and second layers is operably coupled to the first surface of the core layer.
      • 14. The article of manufacture as recited in 13 above, further comprising a grayscale image laser engraved into at least one of the first and second layers.
      • 15. The article of manufacture recited in 13 above, wherein the article of manufacture is an identification document.
      • 16. The article of manufacture of recited in 13 above, wherein the first layer is substantially transparent and the first laser enhancing additive is present in an amount from about 0.001 to 0.100 percent by weight based on the total weight of the first host material.
      • 17. The article of manufacture recited in 13 above, wherein the second layer is substantially transparent and the second laser enhancing additive is present in an amount from about 0.001 to 1.00 percent by weight based on the total weight of the second host material.
      • 18. The article of manufacture recited in 13 above wherein at least one of the first and second host materials comprises a material that is less sensitive to laser radiation than the other of the first and second host materials.
      • 19. The article of manufacture recited in 13 above, wherein at least one of the first and second host materials comprises at least one material selected from the group consisting of thermosetting material, thermoplastic, polymer, copolymer, polycarbonate, fused polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, foamed polypropylene film, polyvinyl chloride, polyethylene, thermoplastic resins, engineering thermoplastic, polyurethane, polyamide, polystyrene, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, high impact polystyrene, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprolactone.
      • 20. The article of manufacture recited in 13 above further comprising a third layer disposed between the first and second layers, the third layer comprising a material that permits transmission of a laser beam therethrough.
      • 21. The article of manufacture recited in 13 above, wherein the first and second layers are substantially transparent.
      • 22. The article of manufacture recited in 13 above, wherein the core layer is substantially opaque.
      • 23. A method of engraving a material by exposing the material to laser radiation, comprising:
      • adding to the material an effective amount of a laser enhancing additive, the laser enhancing additive comprising:
        • at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
      • exposing the material to laser radiation in a manner that causes the material to be engraved by the laser radiation.
      • 24. The method recited in 23 above wherein the effective amount of the laser enhancing additive comprises 0.001% to 100% by weight of the material.
      • 25. The method recited in 23 above wherein the material is substantially transparent and wherein the effective amount of the laser enhancing additive comprises 0.001% to 0.1% by weight of the material.
      • 26. The method recited in 23 above further comprising laser engraving an indicium in grayscale in at least a portion of the material.
      • 27. The method recited in 23 above further comprising using the laser engraved material in the manufacture of an identification document.
      • 28. A method of laser engraving a gray scale image on an article having first and second layers, comprising:
      • adding to the first layer a first effective amount of least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI);
      • adding to the second layer a second effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
      • directing a laser beam so that it passes through at least a portion of the first layer and at least a portion of the second layer to form a grayscale image in at least one of the first and second layers.
      • 29. The method recited in 23 above, further comprising:
      • directing a laser beam so that it that it passes through at least a portion of the first layer and at least a portion of the second layer such that the first and second layers become affixed to each other.
      • 30. The method recited in 28 above wherein the first effective amount and the second effective amount together comprise about 0.001 to 0.1 percent by weight of the total weight of the first and second layers.
      • 31. The method recited in 28 above further comprising using the material in the manufacture of an identification document.
      • 32. A multilayer identification document, comprising:
      • a core layer;
      • a film layer overlaying at least a portion of the core layer and affixed to the portion of the core layer, the film layer comprising an additive that comprises:
        • an effective amount of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • an effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
      • 33. The identification document recited in 32 above, wherein the identification document bears a first indicia thereon, the indicia obtained by exposing the film layer to a laser beam.
      • 34. The identification document recited in 33 above, wherein the indicia comprises at least one of a gray scale image, photograph, text, tactile text, graphics, information, security pattern, security indicia, and digital watermark.
      • 35. The identification document recited in 33 above wherein the first indicia comprises variable information.
      • 36. The identification document recited in 32 above, wherein the film layer is substantially transparent and wherein the additive comprises about 0.001 to 0.10 percent by weight of the film layer.
      • 37. The identification document recited in 36 above, wherein the film layer further comprises:
      • a first sub layer comprising an effective amount of least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
      • a second sub layer comprising an effective amount of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
      • 38. A process for making an identification document, comprising:
      • overlaying at least a portion of a core layer with a film layer, the film layer comprising:
        • at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
      • affixing the film layer to the portion of the core layer.
      • 39. The process recited in 38 above, further comprising directing a laser beam to at least a portion of the film layer to produce a first grayscale indicia in the portion of the film layer.
        D. Second Aspect of the Invention
        D.1 Features
  • In a second aspect of the invention, the above-described inventive laser enhancing additive can be added to a coating on a at least a portion of a surface to be laser engraved or marked, to help to overcome the problem that the material being laser engraved or marked is responsive to laser engraving and/or is not responsive enough to be capable of having grayscale images laser engraved thereon. We have found that the ability to laser engrave at least some materials can be improved and/or the time to laser engrave at least some materials can be reduced, by coating the area of the given material to be engraved with a coating that contains the inventive laser enhancing additive. Note also that the coating containing the inventive laser enhancing additive can be applied to a laminate or another coating. We also have found that the compounds that make up the inventive laser sensitive additives described herein can be divided over two or more coatings, or a coating and a laminate, to provide improved laser engraving performance.
  • A least one embodiment of the second aspect of the invention is based on the surprising discovery that the process of laser engraving of materials, especially materials used in the manufacture of identification documents, is improved and enhanced by coating the area of the material to be engraved with a coating that includes a first effective amount of a first composition, the first composition being at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) together with a second effective amount of a second composition, the second composition being at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate (e.g., RSO2Na or R—OSO2Na), and Thioester (e.g., substances containing —SH). As with the first aspect of the invention, the combination of CuI or CuKI3 together with at least one of ZnS, BaS, alkyl sulfonate, and thioester continues to be referred to as the “inventive laser enhancing additive”.
  • In at least some embodiments, the resultant concentration of the inventive laser enhancing additive in the coating, by weight, ranges from 0.001% to 0.1% by weight. In at least some embodiments, the inventive laser enhancing additive is added at larger concentrations (e.g., from 0.1% to 100%). At concentrations larger than 0.1%, the inventive laser enhancing additive can still be used to enhance laser marking or engraving of an article or surface being coated, but at possible sacrifice of some of the transparency of the coating (if, in fact, the coating is substantially transparent or translucent to begin with). Advantageously, in at least one embodiment, the laser enhancing additive is about 0.06% by weight in the coating. In another advantageous embodiment, the 0.06% by weight includes 0.03% by weight of at least one of CuI or CuKI3 and 0.03% by weight of at least one of ZnS, BaS, alkyl sulfonate, and thioester.
  • Of course, those skilled in the art will appreciate that other concentration ranges for the laser enhancing formulations may be usable, especially when the coating is applied to opaque materials and colored materials. In addition, it will be appreciated that the proportions of the at least one of CuI or CuKI3 can vary, as can proportions of the at least one of ZnS, BaS, alkyl sulfonate, and thioester also can vary. That is, a given composition could have, for example (using for purely illustrative purposes the example of a composition containing CuI and BaS), equal amounts of CuI and BaS, or 3 parts CuI to 5 parts BaS, 2 parts CuI to 1 part BaS, etc. We expect that those skilled in the art will be able to determine optimum proportions without undue experimentation. In addition, we note that at least one advantageous compound that we have tested uses the two sub compositions (e.g., the CuI and BaS, in this example) in equal proportions.
  • The concentration of the inventive laser enhancing additive that is usable with a given coating is at least in part dependent on the properties of the coating (especially the binder material in the coating) laminate and the ultimate use, durability, environmental conditions, etc., to which the coating is subject. It is possible that higher concentrations of the laser enhancing formulations in the coating may affect one or more properties of the coating, such as transparency, durability, malleability, opacity, rigidity, etc. Of course, appropriate quantities of the additives can be determined for a particular coating application without undue experimentation. Additional factors may include engraving time and process and desired engraving quality.
  • It is contemplated that the inventive laser enhancing additive can be added to a coating that is applied (by virtually any known method) to virtually any surface, article, or product., to enable the surface, article, or product to be laser engraved, especially with a high quality grayscale image. Accordingly, we believe that the inventive laser enhancing laminate has applicability to the manufacture many different articles that can be coated, including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, and toys. Further, we contemplate that entire articles of manufacture could be formed wholly or partially using a coating material that contains the inventive laser enhancing additive and then laser engraved or marked.
  • As those skilled in the art will appreciate, the effective amounts of the first and second compositions that are added to the coating can vary depending on the type of coating (e.g., the binder material and/or other additives present in the coating), the material being coated, and on the laser engraving technique being employed. In at least one embodiment, the inventive laser enhancing additive in the coating includes equivalent amounts of the first and second compositions described above. In at least one embodiment, the coating includes more of the second composition than the first composition. In at least one embodiment, the coating includes more of the first composition than the second composition.
  • As those skilled in the art also will appreciate, the inventive laser enhancing additive can be added to many different types of coatings, including organic coatings and aqueous coatings, substantially transparent coatings and non-transparent coatings. In addition, in at least some embodiments, the coating containing the inventive laser enhancing additive can further comprise a binder, which can be, for example, latex, emulsion, a thermoset binder or a thermoplastic binder. Illustrative examples of binder materials which we have found to be usable include resins, polyesters, polycarbonates, vinyls, acrylates, urethanes, and cellulose based materials. We anticipate that those skilled in the art will readily be able to formulate coatings containing the inventive laser enhancing additive using many other binder materials, such as lacquer, varnish, latex, acrylic, epoxy resins, nitrocellulose, alkyd resins, melamine formalaldehyde, polyamides, silicone, and polyvinyl butyral. Those skilled in the art also will appreciate that virtually any resin able to be formed into a coating could be used with the invention. Of course, a coating containing the inventive laser enhancing additive can also include other additives known in the art, such as colorants (e.g., pigments or dyes), stabilizers, lubricants, adhesion promoting agents, toners, surfactants, anti-static agents, thickeners, thixotropic agents, and the like.
  • By applying a coating containing the inventive laser enhancing additive (also referred to herein as the “inventive coating”) to a surface of a material to be laser engraved, we have found that we can form high quality images and other engravings on articles such as multi-layered ID documents, at acceptable throughput rates. The high quality images can include both grayscale laser engraved images (as described herein) and full color laser engraved images (which are more particularly described in applicants' commonly assigned U.S. provisional patent application, application No. 60/344,674, entitled “Full Color Laser Engraved systems for Identification Card Imaging,” attorney docket no. P0504, filed Dec. 24, 2001). Further, we anticipate that the inventive coating can be applied to virtually any part of the surface of any article where laser marking, especially laser engraving of grayscale images, is desired. The entire article or surface need not be coated.
  • We believe that the laser engraving or marking of various articles, including but not limited to identification documents, identification cards, credit cards, prepaid cards, phone cards, smart cards, contact cards, contactless cards, combination contact-contactless cards, proximity cards (e.g., radio frequency (RFID) cards), electronic components, tags, packaging, containers, building materials, construction materials, plumbing materials, automotive, aerospace, and military products, computers, recording media, labels, tools and tooling, medical devices, consumer products, toys, etc., can be improved by coating the surface of the article to be engraved with the inventive coating. This improvement can be achieved on articles whose surface is a laminate to be laser engraved. In addition, the inventive coating, as contemplated herein, can be applied over other coatings (or materials) that cover the surface of an article to be laser engraved or marked, so long as the “intervening” materials between the surface being laser engraved or marked and the inventive coating are transparent to laser radiation.
  • In at least one embodiment, the inventive coating is used to improve the manufacture of an identification document, such as the identification document 10 shown in FIGS. 1 and 2. The security of the document can be enhanced through selective coating of the core layer of the identification document 10 with the inventive coating Because the coating material can be applied through a controlled process (e.g., offset, flexography, pad printing, or screen printing), the placement of the inventive coating (and, thus, the laser enhancing additive) can be precisely controlled. The coating material is sensitive (or responsive to) the laser, so the placement of the inventive coating dictates the location of the engraved information. Selective placement of the laser sensitive materials also help to prevent counterfeiting, since the laser engraveable areas are limited.
  • In one embodiment, the inventive coating is applied to an identification document and the issuing authority for the identification document (e.g., a state's DMV, a passport authority, etc.) can be involved with the design layout, creating unique coating patterns for the document's core. The coating layout can be held secret, further enhancing the security of the document, while creating obstacles for the counterfeiter. Changing the coating materials (e.g., the binder)or additive concentration or adhesive will alter the coating placement and response, creating even further obstacles for the counterfeiter and may make one or more portions of the identification document impossible to engrave with a usable indicia and difficult to duplicate.
  • Note also that use of the inventive coating described herein may provide at least some of the same advantages (especially in the production of grayscale images) previously described in connection with use of the inventive laser enhancing laminate, and they are not repeated here. Further, the lasers previously described in connection with the first aspect of the invention are similarly usable in this second aspect of the invention, and their description is not repeated here.
  • In another embodiment of the invention (illustrated further herein in connection with FIG. 8), the inventive laser enhancing additive can be divided between two optically adjacent layers (e.g., a first layer having a coating and a laminate, or two adjacent laminates (as previously described), or a first layer having a coating and a second layer having a coating). This embodiment can be advantageous for security purposes. For example, during laser engraving, the same visible image can be engraved in both of the two layers, but, depending on the proportions of the inventive laser additive (and/or its layer component parts) disposed in each layer, the visible image will not necessarily look exactly the same in each layer. This can provide a visual effect that is difficult to duplicate.
  • For example, assume that a layer that is optically “closer” to the laser beam (e.g., a top layer) has a first concentration of the inventive laser enhancing additives and a second layer that is optically more distant (e.g., a layer below the top layer) has a second, higher concentration of the inventive laser enhancing additives. When these two layers are laser engraved, the bottom layer will have a visible laser engraved image (e.g., a grayscale image) and the top layer will have a so-called “latent” laser engraved image that can be fainter but still visually perceptible to the naked human eye. It also is contemplated that the either of the two layers could contain colorants (e.g., both visible and non visible (e.g., IR, UV) colorants that further differentiate between the visible laser engraved image and the latent laser engraved image.
  • By “optically adjacent”, it is meant that a laser can pass through from one layer (e.g., a laminate) to another layer (e.g., a second laminate or a core layer or layer having a coating thereon), such that both layers can be laser engraved by the same laser beam at substantially the same time. Two layers that are optically adjacent need not be literally adjacent, although they can be. The two layers can be directly adjacent (e.g., two layers that are fused together), or can be separated by a material that permits the laser beam to pass therethrough but does not itself necessarily have to react to the laser beam. As an example, for optical adjacency, the two layers can be separated by an adhesive that permits laser light to pass therethrough), or can be separated by another type of layer (e.g., a thin film layer) that permits laser light to pass through).
  • By “dividing the laser enhancing additive”, at least either of the following embodiments is included:
      • (a) the entire additive in the entire desired concentration, e.g. 0.06% by weight, is divided between two optically adjacent layers, for example 0.03% in a first layer of laminate and 0.03% in a coating applied to a second laminate that is optically adjacent to the first laminate, or 0.06% by weight in one layer comprising a coating and 0.03% by weight in another layer comprising a coating); or
      • (b) a first component of the inventive laser enhancing additive is provided in a first layer (the “first component” is one of the two components in the inventive laser enhancing additive, either the component comprising at least one of copper iodide and copper potassium iodide or the component comprising at least one of zinc sulfide, barium sulfide, alkyl sulfonate, and thioester) and a second component of the inventive laser enhancing additive (e.g., the other of the two components in the inventive laser enhancing additive) is provided in another layer that is optically adjacent to the first layer.
  • For (a) and (b) above, the two layers can be, for example:
      • (i) two laminates
      • (ii) two coatings applied to a given laminate;
      • (iii) a core layer with a coating and a laminate coupled to the core layer;
      • (iv) a laminate and a coating applied over the laminate;
      • (v) a first laminate with a coating coupled to a second laminate with a coating.
  • Finally, in another aspect of the invention, we have made the surprising discovery, however, that the LAZERFLAIR pigment can be added to a coating (in a similar manner as adding the above described inventive laser enhancing additive to a coating) to enable the laser engraving or marking of grayscale indicia on the article. It is known that the LAZERFLAIR pigment is a laser enhancing additive when added to the actual material to be engraved (see, e.g., the Internet web page http://www.empigments.com/LazerFlair.cfm) such that contrast can be improved. Our testing has shown, however, that LAZERFLAIR also can be added to a coating to improve the laser engraving of an article (e.g., a core layer in an identification document) to which the coating is applied. The LAZERFLAIR additive is available from EM Pigments (EM Pigments can be contacted through 7 Skyline Drive, Hawthorne, N.Y. 10532 USA)
  • D.2 Preparation/Manufacture
  • Embodiments of the inventive coating can be prepared in any customary manner known to those skilled in the art. For example, in one embodiment where the inventive coating comprises an organic polymeric binder, copper potassium iodide, and zinc sulfide, the copper potassium iodide and zinc sulfide can be mixed into the organic polymeric binder during mixing using a blender; the additive can be ground using, for example, a ball mill to reduce particle size extrusion of the of the organic polymeric binder.
  • In another embodiment, the inventive laser enhancing additive can be added to the coating as part of a masterbatch, such as was described previously for the inventive laser enhancing additives that were added to laminates. For example, a masterbatch containing 0.03% by weight of copper potassium iodide and 0.03% by weight of zinc sulfide can be produced and mixed with org), each of the two compounds.
  • Although at least one advantageous embodiment of the invention uses a coating that is a liquid form when applied to the ID document, use of a liquid coating is not necessary. For example, those skilled in the art can, without undue experimentation, use the inventive laser enhancing additive in a coating that is applied in a non-liquid form (e.g., solid or powder that liquefies upon heating).
  • D.3 Illustrative Examples
  • FIG. 7 is an illustrative cross sectional view of an identification document 10 in accordance with a one embodiment of the second aspect of the invention. In the embodiment of FIG. 7, the ID document 10 preferably includes a multi-layered structure. For purposes of illustration, however, the ID document 10 may have an front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 7 differs from the prior art. In FIG. 7, a core material 50 (which for illustrative purposes only is TESLIN), has top surface 67 and bottom surface 69. Although not illustrated in FIG. 7, the core material 50 also could be pre printed with one or more indicia, such as variable information about the bearer of the identification document 10, by a method such as color laser Xerography (note that illustrative examples of printing on the core layer 50 are shown in FIG. 5). A portion of the top surface 67 of the core layer 50 is coated with an inventive coating 70 containing the inventive laser enhancing additive. The inventive coating 70 could, of course, be applied to the bottom surface 69, if desired.
  • In FIG. 7, the coating 70 can be applied selectively, so that only specific areas of the core material 50 are sensitized for laser engraving. Thus, energy 72 from a laser (not shown) can be specifically directed at the area of the ID document 10 that contains the inventive coating 70, to produce indicia 54 l, 54 m on the material that was coated (which, in this example, is the core layer 50). Such selective application of the inventive coating 70 can be advantageous, for example, in the manufacture of identification documents, because the placement and locations of the coating can be kept secret, to help hinder fraud. For example, counterfeiters may not be able to tell what information on the card has been laser engraved and what has not. Even those counterfeiters with access to a laser may not know which areas of the identification document are engraveable. Changing any of the components in the identification document, such as the binder, the inventive laser enhancing additive, or the concentration of the inventive laser enhancing additive.
  • Another anti-fraud advantage can be seen in the embodiment of FIG. 7. If the core layer 50 is pre-printed with non-variable or non-personal information (such as the name of the issuing authority), then coated with the inventive coating 70, the ID document 10 can later be personalized (e.g., have variable information, such an image, signature, birthdate, or biometric data) by laser engraving the coated portions of the core layer 50 with the variable information. This laser engraving can even occur if a laminate is applied over the inventive coating 70, if the laminate permits laser energy 72 to pass therethrough to the inventive coating 70 and the core layer 50.
  • In FIG. 7, a laminate 74 is shown as being disposed on top of the inventive coating 70. The laminate 74 can be applied before or after the coated areas of the core layer 50 are laser engraved. For example, if the laminate 74 is transparent to laser radiation, applying it over the inventive coating 70 will not interfere with the ability of the laser radiation 72 to penetrate through to the inventive coating 70 and the core layer 50. If, however, the laminate 74 is not transparent to laser radiation 72, it can be applied after the laser engraving of the core material 50 has occurred.
  • The inventive coating 70 can be applied to the surface 67 by any known method (e.g., by offset, flexography, screen-printing, spraying, dipping, immersion, brushing, rolling, masking desired coating areas, etc.). The thickness of the coating 70 is dependent on the article being coated, but can range from about 0.01 microns to about 50 microns for ID documents such as ID cards. It will be appreciated that other articles being laser engraved may require or use coatings having different thicknesses.
  • Although FIG. 7 illustrates that the coating 70 covers only a portion of the top surface 67, this is not limiting. The coating 70 can be applied to any surface, and can, if desired, cover the entire surface.
  • We have found that the inventive coatings described herein may offer one or more advantages. For example, using the inventive coatings can enable the materials being coated to be laser marked or engraved with usable grayscale images. In addition, using the inventive coatings can enable faster laser engraving or marking, at lower laser power levels. Also, the inventive coatings can be selectively applied to articles such as identification documents to increase security and deter fraud. Further, the laser engraving that is possible using the inventive coatings is durable, abrasion resistant, and environmentally friendly.
  • D.4 Additional Embodiments of the Second Aspect of the Invention
  • We anticipate that at least the following combinations, and others like them, can be useful embodiments of the second aspect of the invention:
      • 1. A coating having laser engraving properties, comprising:
      • a liquid carrier material; and
      • an effective amount of a laser enhancing additive, the laser enhancing additive comprising:
        • a first quantity of at least one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
      • 2. The coating recited in 1 above wherein the laser enhancing additive is present in an amount from about 0.001 to 100 percent by weight based on the total weight of the composition.
      • 3. The coating recited in 1 above wherein the liquid carrier material is substantially transparent and the laser enhancing additive is present in an amount from about 0.001 to 0.1 percent by weight based on the total weight of the composition.
      • 4. The coating recited in 1 above wherein the laser enhancing additive is present in an amount that is about 0.06 percent by weight based on the total weight of the composition.
      • 5. The coating recited in 4 above, wherein the first and second quantities each comprise about 0.03 percent by weight based on the total weight of the composition.
      • 6. The coating recited in 1 above wherein the first quantity and the second quantity are the same.
      • 7. The coating recited in 1 above wherein the first quantity is greater than the second quantity.
      • 8. The coating recited in 1 above wherein the first quantity is less than the second quantity.
      • 9. The coating recited in 1 above wherein a substrate coated with the coating is laser engraveable by at least one of a diode pumped Nd:Yag laser, light pumped Nd:Yag laser; C02 laser and excimer laser.
      • 10. The coating recited in 1 above wherein the liquid carrier material comprises at least one material selected from the group consisting of resins, polyesters, polycarbonates, vinyls, acrylates, urethanes, and cellulose based materials, thermosetting material, thermoplastic, polymer, copolymer, polycarbonate, fused polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, TESLIN, foamed polypropylene film, polyvinyl chloride, polyethylene, thermoplastic resins, engineering thermoplastic, polyurethane, polyamide, polystyrene, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, high impact polystyrene, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, polyether nitride, and polycaprolactone.
      • 11. A substrate capable of being laser engraved with a grayscale indicia, comprising:
      • a core layer having a first surface; and
      • a coating applied to at least a first area of the first surface, the coating comprising:
        • a first effective amount of a first compound comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • a second effective amount of a second compound, the second compound selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester;
      • wherein laser energy directed at the first area of the core layer is capable of forming a grayscale indicia therein.
      • 12. A substrate capable of being laser engraved with a grayscale indicia, comprising:
      • a core layer having a first surface;
      • a first coating applied to at least a first area of the first surface, the first coating comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
      • a second coating applied to at least a second area of the core layer, the second coating comprising an effective amount of a second laser enhancing additive, the second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester;
      • the first and second areas at least partially overlapping on the core layer to define a third area on the core layer;
      • wherein laser energy directed at the third area of the core layer is capable of forming a grayscale indicia therein.
      • 13. A method of producing an identification document, comprising:
      • providing a core including a top surface and a bottom surface; and
      • coating at least a portion of the top surface with a laser sensitive additives, the laser sensitive additive comprising:
        • an effective amount of at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
        • an effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
      • 14. The method recited in 13 above further comprising laminating at least the top surface of the core with a laminate.
      • 15. The method recited in 13 above further comprising directing a laser beam so that it passes through at least a portion of the coating and reaches the core layer to form a grayscale indicia on the core layer.
      • 16. The method recited in 13 above of claim 2, wherein the core comprises at least one of TESLIN, polycarbonate, polyester, and polyvinyl chloride.
        E. Third Aspect of the Invention.
  • In a third aspect of the invention, the invention utilizes the inventive laser enhancing laminate (or components thereof) in more than one layer on the identification document. Several embodiments of this aspect already have been presented above in the first and second aspects of the invention. Still another embodiment of this aspect is provided below.
  • FIG. 8 is an illustrative cross sectional view of an identification document in accordance with a second embodiment of the second aspect of the invention. In the embodiment of FIG. 8, the ID document 10 preferably includes a multi-layered structure, and the inventive laser enhancing additive is divided between two optically adjacent layers, as previously described. For purposes of illustration, however, the ID document 10 may have an front outward appearance generally similar to the identification document 10 of FIG. 1, although the construction and components of the cross-section shown in FIG. 8 differs from the prior art. In the embodiment of FIG. 8 a first portion of the inventive laser enhancing additive is disposed in a first coating 76 and a second portion of the inventive laser enhancing additive is disposed in a middle laminate 78 applied over the first coating 76. An overlaminate 74 is applied over the middle laminate 78. The first coating 76 is applied to the core layer 50, which in FIG. 8 is made from an opaque white material, such as TESLIN or polycarbonate.
  • In the embodiment of FIG. 8, the first coating 76 contains a first effective amount of at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) and the middle laminate 78 contains a second effective amount of at least one of the following: zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester. The first effective amount is greater than the second effective amount, in this embodiment. The first coating 76 and middle laminate 78 are constructed and arranged so that the laser radiation 72 can pass through both the first coating 76 and middle laminate 78 to form indicia 54 n, 54 o and latent indicia 82, 84 on the ID document 10. Although not apparent in the cross sectional view of FIG. 8, our testing has shown that the indicia 54 l, 54 m formed on the core layer 50 can be a usable grayscale image (by usable, it is at least meant that image can be used for security purposes, such as identification or authentication). As previously described, the latent indicia 82, 84 can comprise lighter or fainter (but still visible) version of the indicia 54 n, 54 o.
  • The latent indicia 82, 84 can be advantageous as a security feature because a counterfeiter may remove the middle laminate 78 in an attempt to alter information in the middle laminate 78, but the information will still be present on the core layer 50 that has the first coating 76. Similarly, a counterfeiter may attempt to remove then replace the middle laminate 78, in order to alter information on the core layer 78, but the latent indicia 82, 84 will still be present and visible in the middle laminate 78. As those skilled in the art will appreciate, the type and placement of an indicia is formed on the core layer 50 depends on the particular type of laser used the manner in which the laser is used (e.g., pumped), and the duration of the application of laser energy.
  • It should be understood that although the example of FIG. 8 shows that the first coating 76 contains the effective amount of at least one of copper potassium iodide (CuKI3) or copper iodide (CuI) and the middle laminate 78 contains the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, the positions of the two compounds in the respective first and second layers could be reversed. That is, the first coating 67 could contain the effective amount of at least one of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate and thioester, and the second coating 78 could contain the effective amount of copper potassium iodide (CuKI3) or copper iodide (CuI).
  • CONCLUDING REMARKS
  • Depending on the availability of lasers, identification documents manufactured in accordance with the invention can be produced in both over the counter and central issue environments. One example of a printing device that may be usable for at least some over the counter embodiments of the invention is the DATACARD DCL30 Desktop Card Laser Personalization System, available from Datacard Group of Minnetonka, Minn.
  • In one embodiment, following lamination and laser engraving, the ID document 10 is cooled and is cut (e.g., by die-cutting) to a predetermined size. In at least one embodiment, however, the substrate and laminate can be sized such that cutting the laminated printed substrate is not necessary.
  • The identification document 10 of the invention may be manufactured in any desired size. For example, identification documents can range in size from standard business card size (47.6.times.85.7 mm) up to identification booklet documents (127.times.177.8 mm), and can have thicknesses in the range of from about 0.3 to about 1.3 mm. At least some identification documents produced in accordance with embodiments of the invention conform to all the requirements of ISO 7810, 1985 and will thus be of the CR-80 size, 85.47-85.73 mm wide, 53.92-54.03 mm high and 0.69-0.84 mm thick. The corners of such CR-80 documents are rounded with a radius of 2.88-3.48 mm.
  • In addition, while the preferred embodiments have been described with reference to cyan, magenta and yellow dyes, the present invention is not so limited. The present invention can include addition color, alternative color schemes and even spot colors. Also, while the present invention has been described with reference to NIR, the inventive technique can be expanded to include dyes responsive in the ultra-violet spectrum and other IR ranges.
  • Further, while some of the examples above are disclosed with specific core components (e.g., TESLIN), we note that our inventive compositions, methods, articles, features, and processes can be applied to other core-based identification documents as well, including those documents manufactured from other materials. For example, where an embodiment has shown polycarbonate or polyester as an example over-laminate, those skilled in the art will appreciate that many other over laminate materials can be used as well.
  • Likewise, the inventive coatings described herein may be used to sensitize other core components as well. Also, we note that the coating can be applied to both a document core and to an over-laminate, and that the laser engraving can be preformed in both (or either) the core and over-laminate.
  • To provide a comprehensive disclosure without unduly lengthening the specification, applicants herein incorporate by reference each of the patent documents referenced previously, along with U.S. Pat. Nos. 6,022,905, 5,298,922, 5,294,774, 4,652,722, 5,824,715 and 5,633,119, and U.S. patent Ser. No. 09/747,735 (filed Dec. 22, 2000) and Ser. No. 09/969,200 (filed Oct. 2, 2001).
  • Having described and illustrated the principles of the technology with reference to specific implementations, it will be recognized that the technology can be implemented in many other, different, forms.
  • Although certain words, languages, phrases, terminology, and product brands have been used herein to describe the various features of the embodiments of the invention, their use is not intended as limiting. Use of a given word, phrase, language, terminology, or product brand is intended to include all grammatical, literal, scientific, technical, and functional equivalents. The terminology used herein is for the purpose of description and not limitation.
  • The technology disclosed herein can be used in combination with other technologies. Examples include the technology detailed in the following applications, the disclosures of which are incorporated herein by reference: Ser. No. 09/747,735 (filed Dec. 22. 2000), Ser. No. 09/969,200 (filed Oct. 2, 2001). Also, instead of ID documents, the inventive techniques can be employed with product tags, product packaging, business cards, bags, charts, maps, labels, etc., etc., particularly those items including engraving of an over-laminate structure. The term ID document is broadly defined herein to include these tags, labels, packaging, cards, etc. In addition, while some of the examples above are disclosed with specific core components, it is noted that-laminates can be sensitized for use with other core components.
  • To provide a comprehensive disclosure without unduly lengthening the specification, applicant hereby incorporates by reference each of the patents and patent applications referenced above.
  • The particular combinations of elements and features in the above-detailed embodiments are exemplary only; the interchanging and substitution of these teachings with other teachings in this and the incorporated-by-reference patents/applications are also expressly contemplated. As those skilled in the art will recognize, variations, modifications, and other implementations of what is described herein can occur to those of ordinary skill in the art without departing from the spirit and the scope of the invention as claimed. Accordingly, the foregoing description is by way of example only and is not intended as limiting. The invention's scope is defined in the following claims and the equivalents thereto.

Claims (38)

1. A composition capable of being mixed into a predetermined polymer material to improve the laser engraving properties of the predetermined polymer material, the composition comprising:
a first laser enhancing additive, the first laser enhancing additive comprising:
a first quantity of at least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI); and
a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
a host material into which the first laser enhancing additive is mixed, the host material comprising a material that is substantially the same type of material as the predetermined polymer material.
2. The composition of claim 1, wherein the host material and first laser additive are masterbatched.
3. The composition of claim 1, wherein the composition is manufactured so as to be able to be mixed into the polymer material and extruded into at least one of a film and a sheet.
4. The composition of claim 1, wherein the first laser enhancing additive is present in a concentration of about 0.001 to 99% by weight.
5. The composition of claim 1, wherein the first laser enhancing additive is present in a concentration of about 0.01 to 0.20% by weight.
6. The composition of claim 4, wherein the first laser enhancing additive is present in a concentration of about 0.06 to 0.12% by weight.
7. The composition of claim 1, wherein the composition further comprises a second laser enhancing additive, the second laser enhancing additive being different than the first laser enhancing additive.
8. The composition of claim 1, wherein the polymer material comprises at least one of polycarbonate, fused polycarbonate, whitish polycarbonate, substantially white polycarbonate, titanium dioxide filled polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, foamed polypropylene film, polyvinyl chloride, polyethylene, polyurethane, polyamide, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, and polyether nitride, polycaprolactone.
9. The composition of claim 1, wherein the first laser enhancing additive is present in the composition in an amount sufficient to permit a gray scale image to be laser engraved into the polymer material after the composition is mixed with the polymer material.
10. The composition of claim 9 wherein the amount of the first laser enhancing additive that is sufficient to permit gray scale images to be laser engraved into the polymer material is about 0.06 to 0.13 percent by weight.
11. The composition as recited in claim 1, wherein the composition is manufactured so as to be mixable into a polymeric coating.
12. The composition as recited in claim 1, wherein the composition is manufactured so as to be mixable into a polymeric laminate.
13. The composition as recited in claim 1, wherein the composition is extruded against a polymer that does not contain the first laser enhancing additive.
14. The composition as recited in claim 1, wherein the host material comprises a material capable of being used as a coating.
15. The composition as recited in claim 14, wherein the material capable of being used as a coating comprises at least one of a resin, polyester, polycarbonate, vinyls, acrylates, urethanes, and cellulose-based coating material.
16. An article manufactured using the composition of claim 1.
17. The article of claim 16, wherein the article is part of an identification document.
18. An article of manufacture capable of being laser engraved comprising:
a base material having a first surface;
a layer applied to the first surface of the base material, the layer comprising:
a first quantity of at least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI); and
a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
a host material into which the first and second quantities are mixed, the host material comprising a material that is substantially the same type of material as the base material.
19. The article of manufacture of claim 18, wherein the article comprises an identification document.
20. The article of manufacture of claim 18, wherein the combination of the first and second quantity is present in the host material in a concentration sufficient to permit the article to be laser engraved with a gray scale image after the layer is applied to the base material.
21. The article of manufacture of claim 18, wherein the combination of the first and second quantity is present in the host material in a concentration of about 0.01 to 0.20% by weight.
22. The article of manufacture of claim 18, wherein the base material comprises at least one of polycarbonate, fused polycarbonate, whitish polycarbonate, substantially white polycarbonate, titanium dioxide filled polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, foamed polypropylene film, polyvinyl chloride, polyethylene, polyurethane, polyamide, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, and polyether nitride, polycaprolactone.
23. The article of manufacture of claim 18, wherein the layer comprises a laminate layer applied to the base material.
24. The article of manufacture of claim 18, wherein the layer comprises a coating applied to the base material.
25. The article of claim 18, wherein the layer further comprises:
a first layer, the first layer comprising the first quantity mixed with the host material; and
a second layer, the second layer comprising the second quantity mixed with the host material;
wherein the first and second layers are oriented such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer.
26. A composition capable of being mixed into a polymer material to improve the laser engraving properties of the polymer material, the composition comprising:
a first quantity of a first additive, the first additive comprising at least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI);
a first host material into which the first additive is mixed, the first host material comprising a material that is substantially the same type of material as the polymer material;
a second quantity of a second additive, the second additive comprising at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
a second host material into which the second additive is mixed, the second host material comprising a material that is substantially the same type of material as the polymer material.
27. An article manufactured using the composition of claim 26, wherein the first additive and first host material are provided to a first layer applied to the article and the second additive and second host material are provided to a second layer applied to the article, wherein the first and second layers are, at time of application, distinct from each other and are constructed and arranged such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer.
28. The article of claim 27, wherein the article is an identification document.
29. A method of improving the laser engraving properties of a polymer material, comprising:
providing a host material comprising a material that is substantially the same as the polymer material;
preparing a mix comprising a blend of the host material and a laser enhancing additive, the laser enhancing additive comprising:
a first quantity of at least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI); and
a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester;
extruding the mix into the polymer material.
30. The method of claim 29 wherein the polymer material comprises polycarbonate, fused polycarbonate, whitish polycarbonate, substantially white polycarbonate, titanium dioxide filled polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, foamed polypropylene film, polyvinyl chloride, polyethylene, polyurethane, polyamide, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, and polyether nitride, polycaprolactone.
31. A method of making an article of manufacture capable of being laser engraved, comprising:
providing a core layer having a first surface;
applying to the core layer:
a first layer comprising a first host material, the first host material comprising an effective amount of a first laser enhancing additive comprising at least one of one of copper potassium iodide (CuKI3) or Copper Iodide (CuI); and
a second layer comprising a second host material, the second layer oriented in relation to the first host material such that a single laser beam can penetrate both at least a portion of the first layer and at least a portion of the second layer, the second host material comprising an effective amount of a second laser enhancing additive, the second laser enhancing additive selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester.
32. The method of claim 31, wherein the article of manufacture comprises an identification document.
33. An identification document, comprising:
a laser enhancing additive, the laser enhancing additive comprising:
a first quantity of at least one of copper potassium iodide (CuKI3) and Copper Iodide (CuI); and
a second quantity of at least one substance selected from the group consisting of zinc sulfide (ZnS), barium sulfide (BaS), alkyl sulfonate, and thioester; and
a polymeric layer into which the laser enhancing additive is mixed, the polymeric layer comprising at least one of polycarbonate, fused polycarbonate, whitish polycarbonate, substantially white polycarbonate, titanium dioxide filled polycarbonate, polyester, amorphous polyester, polyolefin, silicon-filled polyolefin, foamed polypropylene film, polyvinyl chloride, polyethylene, polyurethane, polyamide, expanded polypropylene, polypropylene, acrylonitrile butadiene styrene (ABS), ABS/PC, polyethylene terephthalate (PET), PET-G, PET-F, polybutylene terephthalate PBT), acetal copolymer (POM), polyetherimide (PEI), polyacrylate, poly(4-vinylpyridine, poly(vinyl acetate), polyacrylonitrile, polymeric liquid crystal resin, polysulfone, and polyether nitride, polycaprolactone.
34. The identification document of claim 33, further comprising a laser engraved image formed in the polymeric layer.
35. The identification document of claim 34, wherein the laser engraved image comprises at least one of a gray scale image, photograph, text, tactile text, graphics, information, security pattern, security indicia, and digital watermark.
36. The identification document of claim 33, wherein the laser enhancing additive is present in the identification document in a concentration of about 0.001 to 99 percent by weight.
37. The identification document of claim 33, wherein the laser enhancing additive is present in the identification document in a concentration of about 0.01 to 0.20 percent by weight.
38. The identification document of claim 33, wherein the concentration of the laser enhancing additive is selected based on the color of the polymeric layer.
US10/803,538 2001-12-24 2004-03-17 Laser engraving methods and compositions, and articles having laser engraving thereon Abandoned US20050003297A1 (en)

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040198858A1 (en) * 2002-12-20 2004-10-07 Brian Labrec Increasing thermal conductivity of host polymer used with laser engraving methods and compositions
US20050095408A1 (en) * 2001-12-24 2005-05-05 Labrec Brian C. Laser engraving methods and compositions, and articles having laser engraving thereon
US20050161512A1 (en) * 2001-12-24 2005-07-28 Jones Robert L. Optically variable personalized indicia for identification documents
US20060155732A1 (en) * 2002-07-09 2006-07-13 Seiko Epson Corporation Electronic file operation method and layout edition device
US20060251869A1 (en) * 2005-05-03 2006-11-09 Herslow John H Laser markable secure documents
US20060292946A1 (en) * 2005-06-22 2006-12-28 Perfect Plastic Printing Corporation Financial Transaction Card With Embedded Fabric
US20070152067A1 (en) * 2001-12-24 2007-07-05 Daoshen Bi Covert variable information on ID documents and methods of making same
US20090128860A1 (en) * 2007-11-21 2009-05-21 Quad/Tech, Inc. Ablative printing
US7661600B2 (en) 2001-12-24 2010-02-16 L-1 Identify Solutions Laser etched security features for identification documents and methods of making same
WO2010036332A1 (en) * 2008-09-24 2010-04-01 Standex International Corporation Method and apparatus for laser engraving
US7789311B2 (en) 2003-04-16 2010-09-07 L-1 Secure Credentialing, Inc. Three dimensional data storage
US7793846B2 (en) 2001-12-24 2010-09-14 L-1 Secure Credentialing, Inc. Systems, compositions, and methods for full color laser engraving of ID documents
US7804982B2 (en) 2002-11-26 2010-09-28 L-1 Secure Credentialing, Inc. Systems and methods for managing and detecting fraud in image databases used with identification documents
US7815124B2 (en) 2002-04-09 2010-10-19 L-1 Secure Credentialing, Inc. Image processing techniques for printing identification cards and documents
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
US20140227487A1 (en) * 2013-02-13 2014-08-14 Datacard Corporation Identification document and method of producing the same
US20170096566A1 (en) * 2014-08-29 2017-04-06 Lg Chem, Ltd. Composition for forming conductive pattern, method of forming conductive pattern using the same, and resin structure having conductive pattern
US20170316300A1 (en) * 2014-11-03 2017-11-02 Composecure Llc Ceramic-containing and ceramic composite transaction cards
US10452967B2 (en) 2015-03-05 2019-10-22 Composecure, Llc Cards with special texture and color
US10679113B2 (en) 2014-05-22 2020-06-09 Composecure Llc Transaction and ID cards having selected texture and coloring
US11113593B2 (en) 2019-08-15 2021-09-07 Federal Card Services; LLC Contactless metal cards with fingerprint sensor and display
US11341385B2 (en) 2019-11-16 2022-05-24 Federal Card Services, LLC RFID enabled metal transaction card with shaped opening and shaped slit
US11347993B2 (en) 2019-08-12 2022-05-31 Federal Card Services, LLC Dual interface metal cards and methods of manufacturing
US11416728B2 (en) 2019-08-15 2022-08-16 Federal Card Services, LLC Durable dual interface metal transaction cards
US11455507B2 (en) 2019-10-13 2022-09-27 Federal Card Services, LLC Metal transaction cards containing ceramic having selected coloring and texture
US11645487B2 (en) 2019-08-14 2023-05-09 Amatech Group Limited Metal-containing dual interface smartcards

Families Citing this family (83)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1478321B1 (en) * 2002-02-28 2005-07-06 Gamma Croma S.p.A. Method for reproducing images on cosmetic compositions
GB0225290D0 (en) * 2002-10-30 2002-12-11 Secretary Trade Ind Brit Anti-counterfeiting apparatus and method
GB0227455D0 (en) * 2002-11-26 2002-12-31 Arjo Wiggins Ltd Verification system for magnetically-written data and images
NL1022766C2 (en) * 2003-02-24 2004-09-21 Enschede Sdu Bv Identity card as well as travel document.
JP4823890B2 (en) * 2003-03-06 2011-11-24 ディジマーク コーポレイション Document authentication method
US7763179B2 (en) 2003-03-21 2010-07-27 Digimarc Corporation Color laser engraving and digital watermarking
DE10338444B4 (en) * 2003-08-18 2019-11-28 Smartrac Ip B.V. Transponder inlay for a document for personal identification and method for its production
US7646425B2 (en) * 2003-09-15 2010-01-12 L-I Secure Credentialing, Inc. Multifunction all in one capture station for creating identification documents
US8002197B1 (en) * 2003-10-14 2011-08-23 Whitaker Michael L Transactional card, system, and method
WO2005098746A2 (en) * 2004-03-26 2005-10-20 Digimarc Corporation Identification document having intrusion resistance
US20060042141A1 (en) * 2004-09-01 2006-03-02 Juergen Hansen Frame system
WO2006031169A1 (en) * 2004-09-14 2006-03-23 Pergo (Europe) Ab A decorative laminate board
US20090121472A1 (en) * 2005-04-21 2009-05-14 Laser Energetics, Inc. UV-Visible-IR Multi-Wave Length Laser Marking Process
DE102005025095A1 (en) * 2005-06-01 2006-12-07 Giesecke & Devrient Gmbh Data carrier and method for its production
FR2890332A1 (en) * 2005-09-07 2007-03-09 Gemplus Sa PERSONALIZED TYPE OF IDENTIFICATION CARD MEDIUM WITH ANTI-FALSIFICATION MEANS
BE1016782A3 (en) * 2005-09-22 2007-06-05 Laser Engineering Applic METHOD FOR INTERNAL LASER MARKING IN TRANSPARENT AND LASER MATERIALS AND DEVICE USED FOR THE APPLICATION OF SAID METHOD
US8071912B2 (en) * 2005-11-16 2011-12-06 Technolines, Lp Engineered wood fiber product substrates and their formation by laser processing
US20070196625A1 (en) * 2006-02-21 2007-08-23 Anderson Daryl E Method and apparatus for secure object labeling
US20070194111A1 (en) * 2006-02-21 2007-08-23 Martin Eric T Energy activated retail receipt system
US20090004467A1 (en) * 2006-04-05 2009-01-01 Assa Abloy Ab High durability contactless identification card
US20070237932A1 (en) * 2006-04-05 2007-10-11 Assa Abloy Ab Thermally stable proximity identification card
US20080026319A1 (en) * 2006-06-15 2008-01-31 Stroh Lawrence J Iii Laser marking of coated articles and laser-markable coating composition
US11557163B2 (en) 2006-08-16 2023-01-17 Isonas, Inc. System and method for integrating and adapting security control systems
US9153083B2 (en) 2010-07-09 2015-10-06 Isonas, Inc. System and method for integrating and adapting security control systems
US7775429B2 (en) 2006-08-16 2010-08-17 Isonas Security Systems Method and system for controlling access to an enclosed area
US9589400B2 (en) 2006-08-16 2017-03-07 Isonas, Inc. Security control and access system
CA2663753C (en) * 2006-09-01 2013-02-12 Digimarc Corporation Laser marking of pigment layers on documents
WO2008038483A1 (en) * 2006-09-26 2008-04-03 Yutaka Shoji Kaisha, Ltd. Nonthermal transfer sheet and method for manufacturing the same
KR20090008013U (en) * 2006-11-16 2009-08-05 데이타카드 코포레이션 Mini patch laminate
FR2919741B1 (en) * 2007-08-03 2009-12-18 Arjowiggins Licensing Sas METHOD FOR MANUFACTURING AN INSERT COMPRISING AN RFID DEVICE
DE102008012419A1 (en) 2007-10-31 2009-05-07 Bundesdruckerei Gmbh Polymer composite layer for security and/or valuable documents comprises at least two interlocking polymer layers joined together with a surface printed with a printed layer absorbing in the visible region in and/or on the composite
DE102007059746A1 (en) * 2007-12-07 2009-06-10 Bundesdruckerei Gmbh Method for producing a security and / or value document with personalized information
DE102007059747A1 (en) * 2007-12-07 2009-06-10 Bundesdruckerei Gmbh Polymer layer composite for a security and / or value document
DE102008012426A1 (en) * 2007-10-31 2009-05-07 Bundesdruckerei Gmbh Document-production method for producing a security inserts imaging information/data into layers of a document to form a total security image
US20130214524A1 (en) * 2007-12-07 2013-08-22 Bayer Material Science Ag Method for producing a security and/or valuable document with personalized information
US20150191037A1 (en) * 2007-12-07 2015-07-09 Bundesdruckerei Gmbh Method for producing a security and/or valuable document with personalized information
US9542635B2 (en) 2007-12-31 2017-01-10 Composecure, Llc Foil composite card
DE102008018486B4 (en) * 2008-04-11 2009-12-17 Mühlbauer Ag Laser apparatus and method for applying bar codes to objects
DE102008038990B4 (en) * 2008-08-13 2010-09-23 Isedo Ag Identification card and method for its manufacture
DE102008046511A1 (en) * 2008-09-10 2010-03-11 Giesecke & Devrient Gmbh representation arrangement
TW201111087A (en) * 2009-08-25 2011-04-01 Masonite Corp Methods of forming graphics on a substrate and laser active coatings
US8585956B1 (en) 2009-10-23 2013-11-19 Therma-Tru, Inc. Systems and methods for laser marking work pieces
PL2335938T3 (en) * 2009-12-18 2013-07-31 Agfa Gevaert Laser markable security film
EP2335937B1 (en) * 2009-12-18 2013-02-20 Agfa-Gevaert Laser markable security film
CN102686408B (en) * 2010-01-05 2016-07-06 巴斯夫欧洲公司 Transparent can laser beam marking polyurethane, its preparation method and identify the purposes in labelling producing
JP6046329B2 (en) * 2010-01-08 2016-12-14 早川ゴム株式会社 Joining method using laser light
MX2012012281A (en) * 2010-04-22 2013-04-03 Echelon Laser Systems Lp Laser etching of an acrylic and polyvinylchloride composition, and laser etched article.
DE102010022701B4 (en) * 2010-06-04 2012-02-02 Innovent E.V. Method for identifying a substrate
FR2972388B1 (en) * 2011-03-10 2014-08-29 Jean Pierre Lazzari METHOD FOR PRODUCING A SUBSTRATE FOR LASER COLOR IMAGE AND IDENTITY DOCUMENT USING THE SAME
US9662833B2 (en) * 2012-06-04 2017-05-30 Sabic Global Technologies B.V. Marked thermoplastic compositions, methods of making and articles comprising the same, and uses thereof
WO2013191762A1 (en) 2012-06-21 2013-12-27 3M Innovative Properties Company A static dissipating laser engravable film
US10245866B2 (en) * 2012-11-12 2019-04-02 Agfa-Gevaert Colour imaging of security document precursors
FR2998208B1 (en) * 2012-11-16 2017-01-06 Oberthur Technologies METHOD FOR MAKING A RELIEF PATTERN IN A THIN PLASTIC CARD
US9897551B2 (en) 2013-01-23 2018-02-20 Sabic Global Technologies B.V. Method for accelerated degradation of thermoplastics
US9557218B2 (en) * 2013-01-23 2017-01-31 Sabic Global Technologies B.V. Method for determining degradation of thermoplastics
ITTO20130088A1 (en) * 2013-02-04 2013-05-06 K4B S R L LASER MARKING PROCEDURE, IDENTIFICATION SEAL, IN PARTICULAR ANTI-COUNTERFEITING SEAL, OR ACCESS CODE MADE THROUGH THIS PROCEDURE, AND SYSTEM AND ANTI-COUNTERFEITING CONTROL PROCEDURE
EP3345771B1 (en) * 2013-02-13 2021-03-24 Composecure, LLC Durable card
FR3001912B1 (en) * 2013-02-14 2015-02-27 Sidel Participations "PROCESS FOR OBTAINING A RECIPIENT MARK HAVING A STEP FOR MARKING A PREFORM"
US10486454B2 (en) * 2014-03-13 2019-11-26 Entrust Datacard Corporation Background image security feature
EP2960835A1 (en) * 2014-06-27 2015-12-30 Gemalto SA Data carrier
DE102014109682B4 (en) * 2014-07-10 2016-04-28 Bundesdruckerei Gmbh Mobile terminal for collecting biometric data
DE102014018586A1 (en) * 2014-12-17 2016-06-23 Merck Patent Gmbh Laser-markable and laser-weldable polymeric materials
KR102563400B1 (en) * 2015-10-02 2023-08-03 도판 인사츠 가부시키가이샤 anti-counterfeit structure
JP6707332B2 (en) * 2015-10-29 2020-06-10 株式会社トッパンインフォメディア Information recording medium
US9652909B1 (en) * 2015-11-06 2017-05-16 Amazon Technologies, Inc. Security badge
USD823395S1 (en) 2015-11-06 2018-07-17 Amazon Technologies, Inc. Identification badge
CA3026419A1 (en) * 2016-05-11 2017-11-16 Neenah, Inc. Security document having enhanced foil durability
JP6981404B2 (en) * 2016-05-20 2021-12-15 凸版印刷株式会社 Anti-counterfeit structure
CN107437369A (en) * 2016-12-21 2017-12-05 信码互通(北京)科技有限公司 Plastic sheet and its manufacture method with gray scale mark
WO2018197277A1 (en) * 2017-04-26 2018-11-01 Muehlbauer GmbH & Co. KG Security inlay for an identity document and method for producing a security inlay for an identity document
DE102017004055B4 (en) 2017-04-26 2019-05-16 Mühlbauer Gmbh & Co. Kg Security deposit with a UV order for a document of identification and method for making a security deposit with a UV order for a document of identification
DE102017004039B4 (en) 2017-04-26 2019-06-06 Mühlbauer Gmbh & Co. Kg Security deposit for a document of identification and method for producing a security deposit for a document of identification
CN111328413A (en) 2017-09-11 2020-06-23 特瑞堡密封系统美国有限公司 Sealing detection system and method
CA3016788A1 (en) * 2018-09-07 2020-03-07 Canadian Bank Note Company, Limited Security device for security documents
CN112840346A (en) * 2018-10-16 2021-05-25 西医药服务有限公司 Laser marked medical parts made of elastomer
WO2021083504A1 (en) * 2019-10-28 2021-05-06 Un1Qnx A label for identifying an object, a precursor of the label, a method of reading the label, and a method of manufacturing the label
JP2023502425A (en) * 2019-11-22 2023-01-24 コベストロ・インテレクチュアル・プロパティ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・アンド・コー・カーゲー Layered structure with modified structure and its manufacture
WO2021175880A1 (en) 2020-03-06 2021-09-10 Bayer Oy A marked thread
JP7360347B2 (en) 2020-03-17 2023-10-12 Toppanエッジ株式会社 Information display medium for authenticity determination
JP6997475B2 (en) * 2020-08-21 2022-01-17 三信化工株式会社 Laser-marked resin molded body and its manufacturing method
CA3094381A1 (en) * 2020-09-24 2022-03-24 Canadian Bank Note Company, Limited Laser marked optically variable device
PL439108A1 (en) * 2021-09-30 2023-04-03 Polska Wytwórnia Papierów Wartościowych Spółka Akcyjna Security element, a secured document with a security element and method of making same
CN115559154B (en) * 2022-10-22 2023-10-20 安徽紫江喷铝环保材料有限公司 Local holographic aluminum spraying transfer paper with multiple medium combinations and preparation method thereof

Citations (89)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3758970A (en) * 1971-06-08 1973-09-18 Maran Plastic Co Photograph bearing identification card structure and method of manufacture
US3825317A (en) * 1971-07-28 1974-07-23 Canon Kk Application of a novel photosensitive member to hologram
US3860558A (en) * 1970-12-07 1975-01-14 Ciba Geigy Corp Stabilized polyamide compositions
US3975291A (en) * 1973-03-03 1976-08-17 Bayer Aktiengesellschaft Process for producing laser light
US4035740A (en) * 1974-03-13 1977-07-12 Bayer Aktiengesellschaft Dyestuff laser
US4072911A (en) * 1974-05-04 1978-02-07 Bayer Aktiengesellschaft Dyestuff laser
US4100509A (en) * 1975-07-04 1978-07-11 Bayer Aktiengesellschaft Dyestuff laser
US4256900A (en) * 1977-02-05 1981-03-17 Bayer Aktiengesellschaft Fluorescent azolyl benzocoumarin dyestuffs
US4271395A (en) * 1977-01-05 1981-06-02 Bayer Aktiengesellschaft Dyestuff laser
US4274062A (en) * 1977-01-05 1981-06-16 Bayer Aktiengesellschaft Dyestuff laser
US4317782A (en) * 1978-02-22 1982-03-02 Bayer Aktiengesellschaft Distyryl compounds
US4326066A (en) * 1979-01-23 1982-04-20 Bayer Aktiengesellschaft Triazolyl coumarin compounds, processes for their preparation and their use as whiteners and laser dyestuffs
US4338258A (en) * 1979-09-20 1982-07-06 Bayer Aktiengesellschaft Fluorescent dyestuffs, processes for their preparation and their use as laser dyestuffs
US4384973A (en) * 1980-09-03 1983-05-24 Bayer Aktiengesellschaft Dimethine compounds of the coumarin series, a process for their preparation and their use as luminous dyestuffs
US4467209A (en) * 1980-12-31 1984-08-21 Gao Gesellschaft Fur Automation Und Organisation Mbh Method of producing identification cards and a device for carrying out same
US4468468A (en) * 1981-06-27 1984-08-28 Bayer Aktiengesellschaft Process for the selective analysis of individual trace-like components in gases and liquid
US4507346A (en) * 1982-04-08 1985-03-26 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identification card and a method of producing it
US4510311A (en) * 1982-01-30 1985-04-09 Bayer Aktiengesellschaft Water-insoluble azolystyryl optical brighteners
US4523777A (en) * 1980-12-23 1985-06-18 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card and a method of producing same
US4579754A (en) * 1981-12-24 1986-04-01 Thomas Maurer Identification card having laser inscribed indicia and a method of producing it
US4596409A (en) * 1980-12-23 1986-06-24 Gao Gesellschaft Fuer Automation Und Oganisation Mbh Identification card and method of producing it
US4597593A (en) * 1983-04-20 1986-07-01 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card and a method of producing same
US4597592A (en) * 1982-12-31 1986-07-01 Thomas Maurer Identification card with duplicate data
US4653775A (en) * 1985-10-21 1987-03-31 Polaroid Corporation, Patent Dept. Preprinted image-receiving elements for laminated documents
US4654290A (en) * 1985-02-01 1987-03-31 Motorola, Inc. Laser markable molding compound, method of use and device therefrom
US4663518A (en) * 1984-09-04 1987-05-05 Polaroid Corporation Optical storage identification card and read/write system
US4670882A (en) * 1978-10-07 1987-06-02 Bayer Aktiengesellschaft Dyestuff laser
US4687526A (en) * 1986-01-08 1987-08-18 Identification Systems Company L.P. Method of making an identification card
US4735670A (en) * 1980-12-23 1988-04-05 Gao Gesellschaft Fuer Automation Und Organisation Mbh Method of producing an identification card
US4738949A (en) * 1986-12-29 1988-04-19 Eastman Kodak Company High-security identification card obtained by thermal dye transfer
US4751525A (en) * 1985-05-07 1988-06-14 De La Rue Company, Plc Scanning system and method of scanning
US4766026A (en) * 1985-10-15 1988-08-23 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card with a visible authenticity feature and a method of manufacturing said card
US4765656A (en) * 1985-10-15 1988-08-23 Gao Gesellschaft Fur Automation Und Organisation Mbh Data carrier having an optical authenticity feature and methods for producing and testing said data carrier
US4803114A (en) * 1985-12-14 1989-02-07 Internationale Octrooimaatschappij "Octropa" B.V. PVC film for the production of identity cards
US4816372A (en) * 1986-09-26 1989-03-28 Agfa-Gevaert Aktiengesellschaft Heat development process and color photographic recording material suitable for this process
US4816374A (en) * 1985-04-12 1989-03-28 Societe D'applications Plastiques Rhone-Alpes (Sapra) Method of making a plastic material sensitive to laser radiation and enabling it to be marked by a laser, and articles obtained thereby
US4822973A (en) * 1984-03-30 1989-04-18 Bayer Aktiengesellschaft Composite plastic with laser altered internal material properties
US4999065A (en) * 1986-01-08 1991-03-12 Lasercard Company L.P. Method of making an identification card
US5005872A (en) * 1987-09-22 1991-04-09 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identity card usable as a printing block and a method of producing it
US5024989A (en) * 1990-04-25 1991-06-18 Polaroid Corporation Process and materials for thermal imaging
US5100711A (en) * 1989-02-03 1992-03-31 Jujo Paper Co., Ltd. Optical recording medium optical recording method, and optical recording device used in method
US5138070A (en) * 1989-09-13 1992-08-11 Bayer Aktiengesellschaft Pentamethine dyestuffs and derivatives
US5215864A (en) * 1990-09-28 1993-06-01 Laser Color Marking, Incorporated Method and apparatus for multi-color laser engraving
US5294774A (en) * 1993-08-03 1994-03-15 Videojet Systems International, Inc. Laser marker system
US5298922A (en) * 1988-12-02 1994-03-29 Gao Gesellschaft F. Automation V. Organ. Mbh Multilayer data carrier and methods for writing on a multilayer data carrier
US5421619A (en) * 1993-12-22 1995-06-06 Drexler Technology Corporation Laser imaged identification card
US5489639A (en) * 1994-08-18 1996-02-06 General Electric Company Copper salts for laser marking of thermoplastic compositions
US5509693A (en) * 1994-02-07 1996-04-23 Ncr Corporation Protected printed identification cards with accompanying letters or business forms
US5523125A (en) * 1993-08-27 1996-06-04 Lisco, Inc. Laser engraving and coating process for forming indicia on articles
US5529345A (en) * 1994-02-07 1996-06-25 Ncr Corporation Printed identification cards with accompanying letters or business forms
US5633119A (en) * 1996-03-21 1997-05-27 Eastman Kodak Company Laser ablative imaging method
US5639819A (en) * 1991-01-10 1997-06-17 E. I. Du Pont De Nemours And Company Polyamide compositions
US5717018A (en) * 1995-09-21 1998-02-10 Bayer Ag Laser-inscribable polymer moulding compositions
US5719667A (en) * 1996-07-30 1998-02-17 Bayer Corporation Apparatus for filtering a laser beam in an analytical instrument
US5745308A (en) * 1996-07-30 1998-04-28 Bayer Corporation Methods and apparatus for an optical illuminator assembly and its alignment
US5768001A (en) * 1996-06-10 1998-06-16 Agfa Division, Bayer Corp. Rotating beam deflector having an integral wave front correction element
US5769301A (en) * 1994-07-14 1998-06-23 Agfa Division, Bayer Corporation Method and apparatus for pivotally mounted media transport bridge with improved counterbalance system
US5855969A (en) * 1996-06-10 1999-01-05 Infosight Corp. CO2 laser marking of coated surfaces for product identification
US5867199A (en) * 1995-03-28 1999-02-02 Agfa Division, Bayer Corporation Media guidance system for a scanning system
US5866644A (en) * 1997-03-17 1999-02-02 General Electric Company Composition for laser marking
US5872627A (en) * 1996-07-30 1999-02-16 Bayer Corporation Method and apparatus for detecting scattered light in an analytical instrument
US5895074A (en) * 1997-10-02 1999-04-20 Moore U.S.A., Inc. Identification card and method of making
US5897938A (en) * 1996-01-08 1999-04-27 Nippon Kayaku Kabushiki Kaisha Laser marking article and laser marking method
US5936986A (en) * 1996-07-30 1999-08-10 Bayer Corporation Methods and apparatus for driving a laser diode
US5944356A (en) * 1992-12-23 1999-08-31 Gao Gesellschaft Fur Automation Und Organisation Identity card with a humanly visible authenticity feature
US6017972A (en) * 1997-06-13 2000-01-25 M.A. Hannacolor Controlled color laser marking of plastics
US6028134A (en) * 1995-07-12 2000-02-22 Teijin Limited Thermoplastic resin composition having laser marking ability
US6037102A (en) * 1995-10-02 2000-03-14 BASF Lacke + Farber Aktiengesellschaft Multilayer recording element suitable for the production of flexographic printing plates by digital information transfer
US6036807A (en) * 1995-12-12 2000-03-14 Ing Groep Nv Method for applying a security code to an article
US6042249A (en) * 1996-07-30 2000-03-28 Bayer Corporation Illuminator optical assembly for an analytical instrument and methods of alignment and manufacture
US6066594A (en) * 1998-09-18 2000-05-23 Polaroid Corporation Identification document
US6071612A (en) * 1999-10-22 2000-06-06 Arteva North America S.A.R.L. Fiber and filament with zinc sulfide delusterant
US6075223A (en) * 1997-09-08 2000-06-13 Thermark, Llc High contrast surface marking
US6086971A (en) * 1996-12-04 2000-07-11 Temtec, Inc. Identification card strip and ribbon assembly
US6110864A (en) * 1993-09-28 2000-08-29 3M Innovative Properties Company Security card and method for making same
US6207344B1 (en) * 1999-09-29 2001-03-27 General Electric Company Composition for laser marking
US6214916B1 (en) * 1998-04-29 2001-04-10 General Electric Company Composition for laser marking
US6214917B1 (en) * 1994-05-05 2001-04-10 Merck Patent Gmbh Laser-markable plastics
US6221552B1 (en) * 2000-01-19 2001-04-24 Xerox Corporation Permanent photoreceptor marking system
US6238840B1 (en) * 1997-11-12 2001-05-29 Hitachi Chemical Company, Ltd. Photosensitive resin composition
US6238847B1 (en) * 1997-10-16 2001-05-29 Dmc Degussa Metals Catalysts Cerdec Ag Laser marking method and apparatus
US6372394B1 (en) * 1997-02-20 2002-04-16 Securency Pty Ltd Laser marking of articles
US6400386B1 (en) * 2000-04-12 2002-06-04 Eastman Kodak Company Method of printing a fluorescent image superimposed on a color image
US20020077380A1 (en) * 1999-06-30 2002-06-20 Esther Wessels Laser-writable polymer composition
US20020111409A1 (en) * 1999-05-28 2002-08-15 Talibuddin Sapna H. Polyester compositions having improved color stability
US6503310B1 (en) * 1999-06-22 2003-01-07 Dmc2 Degussa Metals Catalysts Cerdec Ag Laser marking compositions and method
US20030031340A1 (en) * 1998-07-31 2003-02-13 Alattar Adnan M. Tamper-resistant authentication techniques for identification documents
US6752432B1 (en) * 1999-06-23 2004-06-22 Digimarc Corporation Identification card with embedded halftone image security feature perceptible in transmitted light
US20050095408A1 (en) * 2001-12-24 2005-05-05 Labrec Brian C. Laser engraving methods and compositions, and articles having laser engraving thereon

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153166A (en) * 1960-08-05 1964-10-13 Westinghouse Electric Corp Electroluminescent device having connections on the base
GB1088318A (en) * 1965-04-21 1967-10-25 Gen Electric Blue electroluminescent phosphor
JPS5932319B2 (en) 1974-03-22 1984-08-08 富士写真フイルム株式会社 recording material
DE2648180C2 (en) 1976-02-18 1978-09-07 Hoechst Ag, 6000 Frankfurt Device for checking the authenticity of an identity carrier
DE2613034A1 (en) 1976-03-26 1977-09-29 Siemens Ag FALSE-PROOF IDENTITY CARD WITH LIPPMANN-BRAGG HOLOGRAM
FR2423829A1 (en) 1978-04-19 1979-11-16 Telemecanique Electrique PROCEDURE AND DEVICE FOR READING A MEDIA OF INFORMATION CODED ACCORDING TO A BAR CODE, APPLICABLE WHEN THE DIRECTION OF THE BARS IN RELATION TO THAT OF THE READING BEAM MAY VARY
DE2841519A1 (en) 1978-09-23 1980-04-03 Bayer Ag FLUORESCENT DYES
DE2907004C2 (en) 1979-02-22 1981-06-25 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Identity card and process for its production
US4621271A (en) 1985-09-23 1986-11-04 Eastman Kodak Company Apparatus and method for controlling a thermal printer apparatus
DE3805056A1 (en) 1988-02-18 1989-08-31 Bayer Ag LASER-STAMPABLE MATERIAL
CH677756A5 (en) 1989-01-26 1991-06-28 Ciba Geigy Ag
US5156938A (en) 1989-03-30 1992-10-20 Graphics Technology International, Inc. Ablation-transfer imaging/recording
EP0413664B1 (en) * 1989-08-18 1995-03-22 Ciba-Geigy Ag Laser-marking of plastic objects in any form by means of special effects
DE3932505C2 (en) 1989-09-28 2001-03-15 Gao Ges Automation Org Data carrier with an optically variable element
US5061341A (en) 1990-01-25 1991-10-29 Eastman Kodak Company Laser-ablating a marking in a coating on plastic articles
JPH05501584A (en) * 1990-04-17 1993-03-25 ロクタイト・ルミネセント・システムス・インコーポレーテッド Electroluminescent phosphor with long service life and its manufacturing method
DE4033300C2 (en) 1990-10-19 1994-06-23 Gao Ges Automation Org Multi-layer, card-shaped data carrier and method for producing the same
DE4133124A1 (en) * 1991-10-05 1993-04-08 Basf Ag INORGANIC SUB-GROUP METAL SALTS CONTAINING THERMOPLASTIC MOLDS
US5261987A (en) 1992-06-05 1993-11-16 Eastman Kodak Company Method of making an identification card
US5259311A (en) 1992-07-15 1993-11-09 Mark/Trece Inc. Laser engraving of photopolymer printing plates
JPH082106A (en) 1994-06-24 1996-01-09 Nippon Kayaku Co Ltd Marking composition and laser marking method
US6122403A (en) 1995-07-27 2000-09-19 Digimarc Corporation Computer system linked by using information in data objects
US6614914B1 (en) 1995-05-08 2003-09-02 Digimarc Corporation Watermark embedder and reader
US5841886A (en) 1993-11-18 1998-11-24 Digimarc Corporation Security system for photographic identification
US20020170966A1 (en) 1995-07-27 2002-11-21 Hannigan Brett T. Identification document including embedded data
NL9400498A (en) 1994-03-29 1995-11-01 Iai Bv Patterned value carrier provided with a laser beam.
DE4411067A1 (en) 1994-03-30 1995-10-05 Bayer Ag Polymer molding compounds for partial color changes by laser energy, in particular for the production of colored characters
US5671005A (en) 1995-02-21 1997-09-23 Agfa Division, Bayer Corporation Method and apparatus for maintaining contact between the recording media and media support surface of a scanning system
CH694636A5 (en) 1995-10-12 2005-05-13 Kba Giori Sa A process for the production of documents with a security feature in the form of a film element and document having such a security feature.
US5853955A (en) 1995-12-11 1998-12-29 Mcdonnell Douglas Corp. Substrates and methods for laser marking same
DE19620993A1 (en) 1996-05-24 1997-11-27 Bayer Ag Laser-inscribable polymer molding compounds
US5844685A (en) 1996-07-30 1998-12-01 Bayer Corporation Reference laser beam sampling apparatus
US5840142A (en) * 1996-11-22 1998-11-24 Stevenson; Michael J. Decoration and printing on polyolefin surfaces
US5965242A (en) 1997-02-19 1999-10-12 Eastman Kodak Company Glow-in-the-dark medium and method of making
NL1005313C2 (en) 1997-02-19 1998-08-20 Iai Bv Irreversibly deformable weakening pattern against fraud resistant document.
US6007929A (en) 1997-02-20 1999-12-28 Infosight Corporation Dual paint coat laser-marking labeling system, method and product
DE19711696C1 (en) 1997-03-20 1998-11-12 Basf Drucksysteme Gmbh Process for producing a photopolymerizable recording material
EP0905233A2 (en) 1997-09-04 1999-03-31 Smithkline Beecham Corporation Staphylococcus aureus trigger factor
DE19824349C2 (en) 1998-05-30 2000-06-15 Beiersdorf Ag Process for the production of a laser-inscribable glass pane or a laminated glass
US6127475A (en) 1998-09-25 2000-10-03 General Electric Company Composition for laser marking
DE19848896A1 (en) 1998-10-23 2000-04-27 Bayer Ag Copolymers for rapid prototyping
NL1013028C2 (en) 1999-09-10 2001-03-13 Dsm Nv Information-bearing molded part.
DE10035204A1 (en) 1999-09-13 2001-03-15 Merck Patent Gmbh Laser-markable plastic, e.g. for production of markable components for cars or for plastic packaging, comprises thermoplastic containing effect pigment coated with anthracene or pentaerythritol
DE10100514A1 (en) 2001-01-08 2002-07-11 Basf Drucksysteme Gmbh Process for the production of thermally cross-linked, laser-engravable flexographic printing elements
US6475588B1 (en) 2001-08-07 2002-11-05 General Electric Company Colored digital versatile disks
US7728048B2 (en) 2002-12-20 2010-06-01 L-1 Secure Credentialing, Inc. Increasing thermal conductivity of host polymer used with laser engraving methods and compositions

Patent Citations (99)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860558A (en) * 1970-12-07 1975-01-14 Ciba Geigy Corp Stabilized polyamide compositions
US3758970A (en) * 1971-06-08 1973-09-18 Maran Plastic Co Photograph bearing identification card structure and method of manufacture
US3825317A (en) * 1971-07-28 1974-07-23 Canon Kk Application of a novel photosensitive member to hologram
US3975291A (en) * 1973-03-03 1976-08-17 Bayer Aktiengesellschaft Process for producing laser light
US4035740A (en) * 1974-03-13 1977-07-12 Bayer Aktiengesellschaft Dyestuff laser
US4072911A (en) * 1974-05-04 1978-02-07 Bayer Aktiengesellschaft Dyestuff laser
US4100509A (en) * 1975-07-04 1978-07-11 Bayer Aktiengesellschaft Dyestuff laser
US4271395A (en) * 1977-01-05 1981-06-02 Bayer Aktiengesellschaft Dyestuff laser
US4274062A (en) * 1977-01-05 1981-06-16 Bayer Aktiengesellschaft Dyestuff laser
US4256900A (en) * 1977-02-05 1981-03-17 Bayer Aktiengesellschaft Fluorescent azolyl benzocoumarin dyestuffs
US4317782A (en) * 1978-02-22 1982-03-02 Bayer Aktiengesellschaft Distyryl compounds
US4670882A (en) * 1978-10-07 1987-06-02 Bayer Aktiengesellschaft Dyestuff laser
US4326066A (en) * 1979-01-23 1982-04-20 Bayer Aktiengesellschaft Triazolyl coumarin compounds, processes for their preparation and their use as whiteners and laser dyestuffs
US4338258A (en) * 1979-09-20 1982-07-06 Bayer Aktiengesellschaft Fluorescent dyestuffs, processes for their preparation and their use as laser dyestuffs
US4384973A (en) * 1980-09-03 1983-05-24 Bayer Aktiengesellschaft Dimethine compounds of the coumarin series, a process for their preparation and their use as luminous dyestuffs
US4523777A (en) * 1980-12-23 1985-06-18 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card and a method of producing same
US4596409A (en) * 1980-12-23 1986-06-24 Gao Gesellschaft Fuer Automation Und Oganisation Mbh Identification card and method of producing it
US4735670A (en) * 1980-12-23 1988-04-05 Gao Gesellschaft Fuer Automation Und Organisation Mbh Method of producing an identification card
US4732410A (en) * 1980-12-23 1988-03-22 Gao Gesellschaft Fuer Automation Und Organisation Mbh Identification card and a method of producing same
US4467209A (en) * 1980-12-31 1984-08-21 Gao Gesellschaft Fur Automation Und Organisation Mbh Method of producing identification cards and a device for carrying out same
US4468468A (en) * 1981-06-27 1984-08-28 Bayer Aktiengesellschaft Process for the selective analysis of individual trace-like components in gases and liquid
US4527059A (en) * 1981-06-27 1985-07-02 Bayer Aktiengesellschaft Laser activated mass spectrometer for the selective analysis of individual trace-like components in gases and liquids
US4579754A (en) * 1981-12-24 1986-04-01 Thomas Maurer Identification card having laser inscribed indicia and a method of producing it
US4510311A (en) * 1982-01-30 1985-04-09 Bayer Aktiengesellschaft Water-insoluble azolystyryl optical brighteners
US4507346A (en) * 1982-04-08 1985-03-26 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identification card and a method of producing it
US4672891A (en) * 1982-12-31 1987-06-16 Gao Gesellschaft Fur Automation Und Organisation Mbh Method of producing an identification card
US4597592A (en) * 1982-12-31 1986-07-01 Thomas Maurer Identification card with duplicate data
US4597593A (en) * 1983-04-20 1986-07-01 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card and a method of producing same
US4748452A (en) * 1983-04-20 1988-05-31 Gao Gesellschaft Fur Automation Und Organisation Mbh Method of producing an identification card
US4822973A (en) * 1984-03-30 1989-04-18 Bayer Aktiengesellschaft Composite plastic with laser altered internal material properties
US4663518A (en) * 1984-09-04 1987-05-05 Polaroid Corporation Optical storage identification card and read/write system
US4654290A (en) * 1985-02-01 1987-03-31 Motorola, Inc. Laser markable molding compound, method of use and device therefrom
US4816374A (en) * 1985-04-12 1989-03-28 Societe D'applications Plastiques Rhone-Alpes (Sapra) Method of making a plastic material sensitive to laser radiation and enabling it to be marked by a laser, and articles obtained thereby
US4751525A (en) * 1985-05-07 1988-06-14 De La Rue Company, Plc Scanning system and method of scanning
US4765656A (en) * 1985-10-15 1988-08-23 Gao Gesellschaft Fur Automation Und Organisation Mbh Data carrier having an optical authenticity feature and methods for producing and testing said data carrier
US4766026A (en) * 1985-10-15 1988-08-23 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card with a visible authenticity feature and a method of manufacturing said card
US4894110A (en) * 1985-10-15 1990-01-16 Gao Gesellschaft Fur Automation Und Organisation Mbh Identification card with a visible authenticity feature
US4653775A (en) * 1985-10-21 1987-03-31 Polaroid Corporation, Patent Dept. Preprinted image-receiving elements for laminated documents
US4803114A (en) * 1985-12-14 1989-02-07 Internationale Octrooimaatschappij "Octropa" B.V. PVC film for the production of identity cards
US4999065A (en) * 1986-01-08 1991-03-12 Lasercard Company L.P. Method of making an identification card
US4687526B1 (en) * 1986-01-08 1992-03-24 Lasercard Company L P
US4687526A (en) * 1986-01-08 1987-08-18 Identification Systems Company L.P. Method of making an identification card
US4816372A (en) * 1986-09-26 1989-03-28 Agfa-Gevaert Aktiengesellschaft Heat development process and color photographic recording material suitable for this process
US4738949A (en) * 1986-12-29 1988-04-19 Eastman Kodak Company High-security identification card obtained by thermal dye transfer
US5005872A (en) * 1987-09-22 1991-04-09 Gao Gesellschaft Fur Automation Und Organisation Mbh Multilayer identity card usable as a printing block and a method of producing it
US5122813A (en) * 1987-09-22 1992-06-16 Gao Gesellschaft Fur Automation Und Organisation Mbh. Method of making a multilayer identification card usable as a printing block
US5298922A (en) * 1988-12-02 1994-03-29 Gao Gesellschaft F. Automation V. Organ. Mbh Multilayer data carrier and methods for writing on a multilayer data carrier
US5100711A (en) * 1989-02-03 1992-03-31 Jujo Paper Co., Ltd. Optical recording medium optical recording method, and optical recording device used in method
US5138070A (en) * 1989-09-13 1992-08-11 Bayer Aktiengesellschaft Pentamethine dyestuffs and derivatives
US5024989A (en) * 1990-04-25 1991-06-18 Polaroid Corporation Process and materials for thermal imaging
US5215864A (en) * 1990-09-28 1993-06-01 Laser Color Marking, Incorporated Method and apparatus for multi-color laser engraving
US5639819A (en) * 1991-01-10 1997-06-17 E. I. Du Pont De Nemours And Company Polyamide compositions
US5944356A (en) * 1992-12-23 1999-08-31 Gao Gesellschaft Fur Automation Und Organisation Identity card with a humanly visible authenticity feature
US6179338B1 (en) * 1992-12-23 2001-01-30 GAO Gesellschaft f{umlaut over (u)}r Automation und Organisation Compound film for an identity card with a humanly visible authenticity feature
US5294774A (en) * 1993-08-03 1994-03-15 Videojet Systems International, Inc. Laser marker system
US5523125A (en) * 1993-08-27 1996-06-04 Lisco, Inc. Laser engraving and coating process for forming indicia on articles
US6110864A (en) * 1993-09-28 2000-08-29 3M Innovative Properties Company Security card and method for making same
US5421619A (en) * 1993-12-22 1995-06-06 Drexler Technology Corporation Laser imaged identification card
US5509693A (en) * 1994-02-07 1996-04-23 Ncr Corporation Protected printed identification cards with accompanying letters or business forms
US5529345A (en) * 1994-02-07 1996-06-25 Ncr Corporation Printed identification cards with accompanying letters or business forms
US6214917B1 (en) * 1994-05-05 2001-04-10 Merck Patent Gmbh Laser-markable plastics
US5769301A (en) * 1994-07-14 1998-06-23 Agfa Division, Bayer Corporation Method and apparatus for pivotally mounted media transport bridge with improved counterbalance system
US5489639A (en) * 1994-08-18 1996-02-06 General Electric Company Copper salts for laser marking of thermoplastic compositions
US5867199A (en) * 1995-03-28 1999-02-02 Agfa Division, Bayer Corporation Media guidance system for a scanning system
US6028134A (en) * 1995-07-12 2000-02-22 Teijin Limited Thermoplastic resin composition having laser marking ability
US5717018A (en) * 1995-09-21 1998-02-10 Bayer Ag Laser-inscribable polymer moulding compositions
US6037102A (en) * 1995-10-02 2000-03-14 BASF Lacke + Farber Aktiengesellschaft Multilayer recording element suitable for the production of flexographic printing plates by digital information transfer
US6036807A (en) * 1995-12-12 2000-03-14 Ing Groep Nv Method for applying a security code to an article
US5897938A (en) * 1996-01-08 1999-04-27 Nippon Kayaku Kabushiki Kaisha Laser marking article and laser marking method
US5633119A (en) * 1996-03-21 1997-05-27 Eastman Kodak Company Laser ablative imaging method
US5855969A (en) * 1996-06-10 1999-01-05 Infosight Corp. CO2 laser marking of coated surfaces for product identification
US5768001A (en) * 1996-06-10 1998-06-16 Agfa Division, Bayer Corp. Rotating beam deflector having an integral wave front correction element
US5936986A (en) * 1996-07-30 1999-08-10 Bayer Corporation Methods and apparatus for driving a laser diode
US5719667A (en) * 1996-07-30 1998-02-17 Bayer Corporation Apparatus for filtering a laser beam in an analytical instrument
US5745308A (en) * 1996-07-30 1998-04-28 Bayer Corporation Methods and apparatus for an optical illuminator assembly and its alignment
US5872627A (en) * 1996-07-30 1999-02-16 Bayer Corporation Method and apparatus for detecting scattered light in an analytical instrument
US6042249A (en) * 1996-07-30 2000-03-28 Bayer Corporation Illuminator optical assembly for an analytical instrument and methods of alignment and manufacture
US6086971A (en) * 1996-12-04 2000-07-11 Temtec, Inc. Identification card strip and ribbon assembly
US6372394B1 (en) * 1997-02-20 2002-04-16 Securency Pty Ltd Laser marking of articles
US5866644A (en) * 1997-03-17 1999-02-02 General Electric Company Composition for laser marking
US6017972A (en) * 1997-06-13 2000-01-25 M.A. Hannacolor Controlled color laser marking of plastics
US6022905A (en) * 1997-06-13 2000-02-08 M.A. Hannacolor Controlled color laser marking of plastics
US6075223A (en) * 1997-09-08 2000-06-13 Thermark, Llc High contrast surface marking
US6054170A (en) * 1997-10-02 2000-04-25 Moore U.S.A., Inc. Identification card and method of making
US5895074A (en) * 1997-10-02 1999-04-20 Moore U.S.A., Inc. Identification card and method of making
US6238847B1 (en) * 1997-10-16 2001-05-29 Dmc Degussa Metals Catalysts Cerdec Ag Laser marking method and apparatus
US6238840B1 (en) * 1997-11-12 2001-05-29 Hitachi Chemical Company, Ltd. Photosensitive resin composition
US6214916B1 (en) * 1998-04-29 2001-04-10 General Electric Company Composition for laser marking
US20030031340A1 (en) * 1998-07-31 2003-02-13 Alattar Adnan M. Tamper-resistant authentication techniques for identification documents
US6066594A (en) * 1998-09-18 2000-05-23 Polaroid Corporation Identification document
US20020111409A1 (en) * 1999-05-28 2002-08-15 Talibuddin Sapna H. Polyester compositions having improved color stability
US6503310B1 (en) * 1999-06-22 2003-01-07 Dmc2 Degussa Metals Catalysts Cerdec Ag Laser marking compositions and method
US6752432B1 (en) * 1999-06-23 2004-06-22 Digimarc Corporation Identification card with embedded halftone image security feature perceptible in transmitted light
US20020077380A1 (en) * 1999-06-30 2002-06-20 Esther Wessels Laser-writable polymer composition
US6207344B1 (en) * 1999-09-29 2001-03-27 General Electric Company Composition for laser marking
US6071612A (en) * 1999-10-22 2000-06-06 Arteva North America S.A.R.L. Fiber and filament with zinc sulfide delusterant
US6221552B1 (en) * 2000-01-19 2001-04-24 Xerox Corporation Permanent photoreceptor marking system
US6400386B1 (en) * 2000-04-12 2002-06-04 Eastman Kodak Company Method of printing a fluorescent image superimposed on a color image
US20050095408A1 (en) * 2001-12-24 2005-05-05 Labrec Brian C. Laser engraving methods and compositions, and articles having laser engraving thereon

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7793846B2 (en) 2001-12-24 2010-09-14 L-1 Secure Credentialing, Inc. Systems, compositions, and methods for full color laser engraving of ID documents
US20050095408A1 (en) * 2001-12-24 2005-05-05 Labrec Brian C. Laser engraving methods and compositions, and articles having laser engraving thereon
US20050161512A1 (en) * 2001-12-24 2005-07-28 Jones Robert L. Optically variable personalized indicia for identification documents
US8083152B2 (en) 2001-12-24 2011-12-27 L-1 Secure Credentialing, Inc. Laser etched security features for identification documents and methods of making same
US20070152067A1 (en) * 2001-12-24 2007-07-05 Daoshen Bi Covert variable information on ID documents and methods of making same
US7927685B2 (en) 2001-12-24 2011-04-19 L-1 Secure Credentialing, Inc. Laser engraving methods and compositions, and articles having laser engraving thereon
US7661600B2 (en) 2001-12-24 2010-02-16 L-1 Identify Solutions Laser etched security features for identification documents and methods of making same
US7798413B2 (en) 2001-12-24 2010-09-21 L-1 Secure Credentialing, Inc. Covert variable information on ID documents and methods of making same
US7694887B2 (en) 2001-12-24 2010-04-13 L-1 Secure Credentialing, Inc. Optically variable personalized indicia for identification documents
US8833663B2 (en) 2002-04-09 2014-09-16 L-1 Secure Credentialing, Inc. Image processing techniques for printing identification cards and documents
US20110123132A1 (en) * 2002-04-09 2011-05-26 Schneck Nelson T Image Processing Techniques for Printing Identification Cards and Documents
US7815124B2 (en) 2002-04-09 2010-10-19 L-1 Secure Credentialing, Inc. Image processing techniques for printing identification cards and documents
US7824029B2 (en) 2002-05-10 2010-11-02 L-1 Secure Credentialing, Inc. Identification card printer-assembler for over the counter card issuing
US20060155732A1 (en) * 2002-07-09 2006-07-13 Seiko Epson Corporation Electronic file operation method and layout edition device
US7804982B2 (en) 2002-11-26 2010-09-28 L-1 Secure Credentialing, Inc. Systems and methods for managing and detecting fraud in image databases used with identification documents
US7728048B2 (en) * 2002-12-20 2010-06-01 L-1 Secure Credentialing, Inc. Increasing thermal conductivity of host polymer used with laser engraving methods and compositions
US20040198858A1 (en) * 2002-12-20 2004-10-07 Brian Labrec Increasing thermal conductivity of host polymer used with laser engraving methods and compositions
US7789311B2 (en) 2003-04-16 2010-09-07 L-1 Secure Credentialing, Inc. Three dimensional data storage
US7287704B2 (en) * 2005-05-03 2007-10-30 Composecure, Llc Laser markable secure documents
US20060251869A1 (en) * 2005-05-03 2006-11-09 Herslow John H Laser markable secure documents
US20060292946A1 (en) * 2005-06-22 2006-12-28 Perfect Plastic Printing Corporation Financial Transaction Card With Embedded Fabric
US9047542B2 (en) 2007-11-21 2015-06-02 Quad/Graphics, Inc. System and method for adding data to a printed publication
US8120811B2 (en) 2007-11-21 2012-02-21 Quad/Graphics, Inc. System and method for adding data to a printed publication
US8625152B2 (en) 2007-11-21 2014-01-07 Quad/Graphics, Inc. System and method for adding data to a printed publication
US9607249B2 (en) 2007-11-21 2017-03-28 Quad/Graphics, Inc. System and method for adding data to a printed publication
US20090128860A1 (en) * 2007-11-21 2009-05-21 Quad/Tech, Inc. Ablative printing
WO2010036332A1 (en) * 2008-09-24 2010-04-01 Standex International Corporation Method and apparatus for laser engraving
US20140227487A1 (en) * 2013-02-13 2014-08-14 Datacard Corporation Identification document and method of producing the same
US10679113B2 (en) 2014-05-22 2020-06-09 Composecure Llc Transaction and ID cards having selected texture and coloring
US10867233B2 (en) 2014-05-22 2020-12-15 Composecure Llc Transaction and ID cards having selected texture and coloring
US10922601B2 (en) 2014-05-22 2021-02-16 Composecure, Llc Transaction and ID cards having selected texture and coloring
US11853829B2 (en) 2014-05-22 2023-12-26 Composecure, Llc Transaction and ID cards having selected texture and coloring
US20170096566A1 (en) * 2014-08-29 2017-04-06 Lg Chem, Ltd. Composition for forming conductive pattern, method of forming conductive pattern using the same, and resin structure having conductive pattern
US11521035B2 (en) 2014-11-03 2022-12-06 Composecure, Llc Ceramic-containing and ceramic composite transaction cards
US20170316300A1 (en) * 2014-11-03 2017-11-02 Composecure Llc Ceramic-containing and ceramic composite transaction cards
US10783422B2 (en) * 2014-11-03 2020-09-22 Composecure, Llc Ceramic-containing and ceramic composite transaction cards
US10452967B2 (en) 2015-03-05 2019-10-22 Composecure, Llc Cards with special texture and color
US11347993B2 (en) 2019-08-12 2022-05-31 Federal Card Services, LLC Dual interface metal cards and methods of manufacturing
US11645487B2 (en) 2019-08-14 2023-05-09 Amatech Group Limited Metal-containing dual interface smartcards
US11113593B2 (en) 2019-08-15 2021-09-07 Federal Card Services; LLC Contactless metal cards with fingerprint sensor and display
US11416728B2 (en) 2019-08-15 2022-08-16 Federal Card Services, LLC Durable dual interface metal transaction cards
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US11341385B2 (en) 2019-11-16 2022-05-24 Federal Card Services, LLC RFID enabled metal transaction card with shaped opening and shaped slit

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US7927685B2 (en) 2011-04-19
EP1550077A4 (en) 2006-07-05
WO2003055684A3 (en) 2005-05-06
CA2671998A1 (en) 2003-07-10
AU2002353174A1 (en) 2003-07-15
CA2469938C (en) 2009-09-15
EP1550077B1 (en) 2009-07-08
DE60232918D1 (en) 2009-08-20
CN1316421C (en) 2007-05-16
WO2003055684A2 (en) 2003-07-10
CA2469938A1 (en) 2003-07-10
US20050095408A1 (en) 2005-05-05
HK1079597A1 (en) 2006-04-07
EP1550077A2 (en) 2005-07-06
AU2009202090A1 (en) 2009-06-18
US20030234286A1 (en) 2003-12-25
CN1628318A (en) 2005-06-15
ATE435757T1 (en) 2009-07-15

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