US20070095480A1 - Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD) - Google Patents

Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD) Download PDF

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Publication number
US20070095480A1
US20070095480A1 US11/640,663 US64066306A US2007095480A1 US 20070095480 A1 US20070095480 A1 US 20070095480A1 US 64066306 A US64066306 A US 64066306A US 2007095480 A1 US2007095480 A1 US 2007095480A1
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Prior art keywords
lamp
dvd
spiral
disk
curing
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Abandoned
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US11/640,663
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C. Panico
Louis Panico
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Xenon Corp
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Xenon Corp
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Priority to US11/640,663 priority Critical patent/US20070095480A1/en
Publication of US20070095480A1 publication Critical patent/US20070095480A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/322—Circular lamps
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/305—Flat vessels or containers
    • H01J61/307—Flat vessels or containers with folded elongated discharge path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/32—Special longitudinal shape, e.g. for advertising purposes
    • H01J61/327—"Compact"-lamps, i.e. lamps having a folded discharge path

Definitions

  • the manufacturing of compact disks (CDs) and digital versatile (or video) disks (DVDs) for computer and video applications can include a number of processes, such as bonding in the case of DVDs and overcoat curing in either case, in which pulsed ultraviolet (UV) light can be used in the manufacturing process.
  • the UV light source for providing the pulsed UV energy may be an arc lamp filled with xenon gas, thus generating significant UV energy.
  • a lamp with a linear elongated lamp shroud or tube can be used to generate the UV light energy for processing such disks.
  • the use of such an elongated lamp requires relative motion of the lamp with respect to the circular disk during manufacture in order to expose the disk to the UV energy in a uniform manner.
  • a lamp with at least one circular turn, and preferable in a spiral configuration is used for disk manufacturing processes that utilize pulse UV light to provide a uniform intensity of UV energy to the circular disk, without requiring relative motion between the disk and the lamp during the processing (although there would be relative motion when the disk is brought to a processing station that has the UV light).
  • the invention thus includes a system for processing a CD or DVD including a spiral lamp, and a method for curing a CD or DVD with a spiral lamp. (For simplicity, such a video or computer disk will be referred to generally here as a DVD.)
  • a contoured reflector can be provided to increase the intensity of the UV energy onto the disk surface and to make it more uniform.
  • Another mirror can be used to help direct energy to the edge of the DVD for edge curing, as it has been found that this is an area that may not be sufficiently cured, especially in DVDs here two sides are bonded together.
  • the mirrors and reflectors thus can reflect and diffuse the UV energy more uniformly across the disk surface and direct the energy where desired.
  • the lamp can have one or more turns lying in one plane parallel to the workpiece, or the lamp can have turns in different planes parallel to the workpiece.
  • the lamp can be in two or more parts with an inner ring or spiral and a separate outer ring or spiral, which may or may not be in the same horizontal plane as the inner ring.
  • the different planes can be employed to help provide uniformity and to make sure a sufficient amount of energy gets to the edge and periphery.
  • the spiral lamp improves edge curing while also minimizing thermal buildup.
  • the use of a spiral also avoids the need to move the DVD relative to the lamp during processing.
  • FIGS. 1 and 2 are a plan view and a side view of a spiral lamp according to the present invention.
  • FIG. 3 is a part side view, part cross-sectional view of a lamp, a workpiece, a reflector, and another mirror.
  • FIG. 4 is a cross-sectional view of a lamp according to another embodiment of the invention.
  • a spiral-shaped lamp 10 is used for curing a CD or DVD (again, such computer and video disks are referred to her collectively and generally as DVDs) during manufacture, such as when two parts of the DVD are bonded together, or when an overcoat (e.g., graphics on a disk) is to be cured
  • Uv light is useful in such processes for providing curing of a bonding agent or an overcoat without providing excessive heat, a known benefit of pulsed light.
  • Lamp 10 has an anode end 12 and a cathode end 14 for connection to an energy supply.
  • lamp 10 is shaped in a spiral and is centered over the DVD in such a way that it provides minimal energy in the center of the disk where there is a hole and an unrecorded area, but more energy over the rest of the DVD.
  • the spiral shape continues to the outer diameter of the disk area.
  • FIG. 1 shows a total of two turns, although a single ring would be possible and more turns could be used.
  • the spiral or other circular shape improves uniformity of the applied light as compared to a linear lamp.
  • the diameter of the lamp, from cathode end 14 to an opposite side of the lamp can range from about 4 to 6 inches, a suitable diameter for use in curing a DVD, which is about 4.75 inches.
  • the lamp has a greater diameter than the DVD to help promote curing at the edge, although the diameter may be less.
  • the lamp could also have energy providing portions in different parallel planes relative to the workpiece.
  • lamp 10 is shown over a DVD 18 .
  • a contoured mirror 20 preferably configured so that the energy that is provided to the DVD is substantially uniform over the whole surface while providing little energy in the center where the DVD has a hole.
  • the exact contour can be determined as needed to obtain the desired uniform energy on the DVD.
  • Another mirror 22 can also be provided to help direct energy to the edge of the DVD as shown along path 24 , thus providing additional energy to ensure curing at the edge.
  • a lamp 30 can have a first ring 32 and a second ring 34 (and possibly additional rings) that lie in different planes in a direction parallel to a workpiece 36 . Rings 32 and 34 can be spaced apart and energized separately, or thecan be connected like a spiral in a manner as shown in FIGS. 1 and 2 .
  • the reflectors and mirror as in FIG. 3 can also be provided. This configuration can be desirable for ensuring sufficient energy at the periphery of the DVD.
  • DVDs can be cured with pulsed UV light, and thus one of skill can establish parameters for operation, such as energy, energy density, pulse width, pulse time, etc based on the materials used to make the disk, the process to be performed, and the other factors, such as a particular adhesive that may be used.

Abstract

A spiral-shaped lamp (10) is used for disk manufacturing processes, such as curing of coating or bonding, to provide uniform intensity of UV energy to the circular disk without requiring relative motion between the disk and the lamp during the curing process.

Description

    CROSS-REFERENCE TO RELATED APPLICATION
  • This application is a continuation of U.S. application Ser. No. 10/055,251, filed Jan. 11, 2002, entitled “SPIRAL-SHAPED LAMP FOR UV CURING OF COATINGS AND BONDING FOR A DIGITAL VERSATILE DISK (DVD) OR COMPACT DISK (CD),” now U.S. Pat. No. 7,150,806; which is a continuation of PCT/US99/26188 filed Nov. 4, 1999, which claims priority from U.S. Provisional Application Ser. No. 60/107,057, filed Nov. 4, 1998, all of which are incorporated herein by reference.
    • BACKGROUND OF THE INVENTION
  • The manufacturing of compact disks (CDs) and digital versatile (or video) disks (DVDs) for computer and video applications can include a number of processes, such as bonding in the case of DVDs and overcoat curing in either case, in which pulsed ultraviolet (UV) light can be used in the manufacturing process. The UV light source for providing the pulsed UV energy may be an arc lamp filled with xenon gas, thus generating significant UV energy.
  • It is known that a lamp with a linear elongated lamp shroud or tube can be used to generate the UV light energy for processing such disks. The use of such an elongated lamp requires relative motion of the lamp with respect to the circular disk during manufacture in order to expose the disk to the UV energy in a uniform manner.
    • SUMMARY OF THE INVENTION
  • According to the present invention, a lamp with at least one circular turn, and preferable in a spiral configuration, is used for disk manufacturing processes that utilize pulse UV light to provide a uniform intensity of UV energy to the circular disk, without requiring relative motion between the disk and the lamp during the processing (although there would be relative motion when the disk is brought to a processing station that has the UV light). The invention thus includes a system for processing a CD or DVD including a spiral lamp, and a method for curing a CD or DVD with a spiral lamp. (For simplicity, such a video or computer disk will be referred to generally here as a DVD.)
  • A contoured reflector can be provided to increase the intensity of the UV energy onto the disk surface and to make it more uniform. Another mirror can be used to help direct energy to the edge of the DVD for edge curing, as it has been found that this is an area that may not be sufficiently cured, especially in DVDs here two sides are bonded together. The mirrors and reflectors thus can reflect and diffuse the UV energy more uniformly across the disk surface and direct the energy where desired.
  • The lamp can have one or more turns lying in one plane parallel to the workpiece, or the lamp can have turns in different planes parallel to the workpiece. Alternatively, the lamp can be in two or more parts with an inner ring or spiral and a separate outer ring or spiral, which may or may not be in the same horizontal plane as the inner ring. The different planes can be employed to help provide uniformity and to make sure a sufficient amount of energy gets to the edge and periphery.
  • The spiral lamp improves edge curing while also minimizing thermal buildup. The use of a spiral also avoids the need to move the DVD relative to the lamp during processing. Other features and advantages will become apparent from the following detailed description, drawings, and claims.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIGS. 1 and 2 are a plan view and a side view of a spiral lamp according to the present invention.
  • FIG. 3 is a part side view, part cross-sectional view of a lamp, a workpiece, a reflector, and another mirror.
  • FIG. 4 is a cross-sectional view of a lamp according to another embodiment of the invention.
    • DESCRIPTION OF PREFERRED EMBODIMENTS
  • Referring to FIGS. 1 and 2, a spiral-shaped lamp 10 is used for curing a CD or DVD (again, such computer and video disks are referred to her collectively and generally as DVDs) during manufacture, such as when two parts of the DVD are bonded together, or when an overcoat (e.g., graphics on a disk) is to be cured Uv light is useful in such processes for providing curing of a bonding agent or an overcoat without providing excessive heat, a known benefit of pulsed light. Lamp 10 has an anode end 12 and a cathode end 14 for connection to an energy supply.
  • As shown in FIG. 1, lamp 10 is shaped in a spiral and is centered over the DVD in such a way that it provides minimal energy in the center of the disk where there is a hole and an unrecorded area, but more energy over the rest of the DVD. The spiral shape continues to the outer diameter of the disk area. FIG. 1 shows a total of two turns, although a single ring would be possible and more turns could be used. In addition, it would be possible to have concentric rings that do not form a single monolithic lamp unit. The spiral or other circular shape improves uniformity of the applied light as compared to a linear lamp.
  • In a preferred embodiment, the diameter of the lamp, from cathode end 14 to an opposite side of the lamp can range from about 4 to 6 inches, a suitable diameter for use in curing a DVD, which is about 4.75 inches. In one embodiment, the lamp has a greater diameter than the DVD to help promote curing at the edge, although the diameter may be less. The lamp could also have energy providing portions in different parallel planes relative to the workpiece.
  • Referring to FIG. 3, lamp 10 is shown over a DVD 18. Over lamp 10 is a contoured mirror 20 preferably configured so that the energy that is provided to the DVD is substantially uniform over the whole surface while providing little energy in the center where the DVD has a hole. The exact contour can be determined as needed to obtain the desired uniform energy on the DVD.
  • Another mirror 22 can also be provided to help direct energy to the edge of the DVD as shown along path 24, thus providing additional energy to ensure curing at the edge.
  • Referring to FIG. 4, a lamp 30 can have a first ring 32 and a second ring 34 (and possibly additional rings) that lie in different planes in a direction parallel to a workpiece 36. Rings 32 and 34 can be spaced apart and energized separately, or thecan be connected like a spiral in a manner as shown in FIGS. 1 and 2. The reflectors and mirror as in FIG. 3 can also be provided. This configuration can be desirable for ensuring sufficient energy at the periphery of the DVD.
  • As indicated above, it is known in the art that DVDs can be cured with pulsed UV light, and thus one of skill can establish parameters for operation, such as energy, energy density, pulse width, pulse time, etc based on the materials used to make the disk, the process to be performed, and the other factors, such as a particular adhesive that may be used.
  • Having described certain embodiments of the present invention, it should be apparent that modifications can be made without departing from the scope of the appended claims.

Claims (3)

1. A system for processing a DVD comprising a pulsed lamp for directing pulse light to the DVD, the lamp having a configuration with at least one circular turn,
wherein the lamp is a spiral with at least two turns,
the system further comprising a contoured reflector positioned to reflect light from the lamp to the DVD, the reflector being configured to provide less light to the center of the DVD and more light to the periphery.
2. The system of claim 1, wherein the lamp had a diameter greater than that of the DVD.
3. The system of claim 1, wherein the lamp had a diameter less than that of the DVD.
US11/640,663 1998-11-04 2006-12-18 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD) Abandoned US20070095480A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/640,663 US20070095480A1 (en) 1998-11-04 2006-12-18 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US10705798P 1998-11-04 1998-11-04
PCT/US1999/026188 WO2000026029A1 (en) 1998-11-04 1999-11-04 A spiral-shaped lamp for uv curing of coatings and bonding for a digital versatile disk (dvd) or compact disk (cd)
US10/055,251 US7150806B2 (en) 1998-11-04 2002-01-11 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)
US11/640,663 US20070095480A1 (en) 1998-11-04 2006-12-18 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)

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US10/055,251 Continuation US7150806B2 (en) 1998-11-04 2002-01-11 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)

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US20070095480A1 true US20070095480A1 (en) 2007-05-03

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US11/640,663 Abandoned US20070095480A1 (en) 1998-11-04 2006-12-18 Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)

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US (2) US7150806B2 (en)
JP (1) JP2002528846A (en)
AU (1) AU1609100A (en)
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WO (1) WO2000026029A1 (en)

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US20070247080A1 (en) * 2006-04-21 2007-10-25 Xenon Corporation Multistrike gas discharge lamp ignition apparatus and method
US20080150443A1 (en) * 2006-12-21 2008-06-26 Xenon Corporation Multiple gas discharge lamp interleave trigger circuit

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JP2002528846A (en) * 1998-11-04 2002-09-03 ゼノン・コーポレーション Spiral lamp for UV curing of coatings and joining digital versatile discs (DVD) or compact discs (CD)
US7063583B2 (en) * 2001-03-23 2006-06-20 Wafermasters, Inc. Multi-spectral uniform light source
US20040134603A1 (en) * 2002-07-18 2004-07-15 Hideo Kobayashi Method and apparatus for curing adhesive between substrates, and disc substrate bonding apparatus
JP2004269633A (en) * 2003-03-06 2004-09-30 National Institute Of Advanced Industrial & Technology Vacuum ultraviolet bonding apparatus
JP2006085943A (en) * 2004-09-14 2006-03-30 Matsushita Electric Ind Co Ltd Light emitting tube, fluorescent lamp, and illumination device

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US20030010435A1 (en) 2003-01-16
WO2000026029A9 (en) 2000-11-02
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WO2000026029A1 (en) 2000-05-11
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