US20080063978A1 - Photo-curable resin composition, method of patterning the same, and ink jet head and method of fabricating the same - Google Patents
Photo-curable resin composition, method of patterning the same, and ink jet head and method of fabricating the same Download PDFInfo
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- US20080063978A1 US20080063978A1 US11/850,938 US85093807A US2008063978A1 US 20080063978 A1 US20080063978 A1 US 20080063978A1 US 85093807 A US85093807 A US 85093807A US 2008063978 A1 US2008063978 A1 US 2008063978A1
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- photo
- curable resin
- epoxy compound
- resin layer
- catalyst
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- 239000011342 resin composition Substances 0.000 title claims abstract description 33
- 238000000059 patterning Methods 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000004593 Epoxy Substances 0.000 claims abstract description 55
- 150000001875 compounds Chemical class 0.000 claims abstract description 50
- 239000011941 photocatalyst Substances 0.000 claims abstract description 39
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 239000003999 initiator Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims abstract description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 10
- BGTOWKSIORTVQH-UHFFFAOYSA-N cyclopentanone Chemical compound O=C1CCCC1 BGTOWKSIORTVQH-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 229910004613 CdTe Inorganic materials 0.000 claims abstract description 7
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims abstract description 7
- 229910002370 SrTiO3 Inorganic materials 0.000 claims abstract description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 6
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims abstract description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims abstract description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008096 xylene Substances 0.000 claims abstract description 5
- 229920005989 resin Polymers 0.000 claims description 41
- 239000011347 resin Substances 0.000 claims description 41
- 239000000758 substrate Substances 0.000 claims description 36
- 239000003822 epoxy resin Substances 0.000 claims description 10
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- 238000007142 ring opening reaction Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
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- 238000000206 photolithography Methods 0.000 description 4
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- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
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- 239000000654 additive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- RVSGESPTHDDNTH-UHFFFAOYSA-N alumane;tantalum Chemical compound [AlH3].[Ta] RVSGESPTHDDNTH-UHFFFAOYSA-N 0.000 description 2
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- OWMNWOXJAXJCJI-UHFFFAOYSA-N 2-(oxiran-2-ylmethoxymethyl)oxirane;phenol Chemical compound OC1=CC=CC=C1.OC1=CC=CC=C1.C1OC1COCC1CO1 OWMNWOXJAXJCJI-UHFFFAOYSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N Bisphenol A Natural products C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/011—Crosslinking or vulcanising agents, e.g. accelerators
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1601—Production of bubble jet print heads
- B41J2/1603—Production of bubble jet print heads of the front shooter type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1631—Manufacturing processes photolithography
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0042—Photosensitive materials with inorganic or organometallic light-sensitive compounds not otherwise provided for, e.g. inorganic resists
- G03F7/0043—Chalcogenides; Silicon, germanium, arsenic or derivatives thereof; Metals, oxides or alloys thereof
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/0048—Photosensitive materials characterised by the solvents or agents facilitating spreading, e.g. tensio-active agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
- C08K2003/3027—Sulfides of cadmium
Definitions
- the present general inventive concept relates to a photo-curable resin composition, a method of patterning the photo-curable resin composition layer, and an ink jet head and method of fabricating the same and, more particularly, to a photo-curable resin composition including a photo-catalyst as a photo-initiator, a method of patterning a photo-curable resin layer made of the photo-curable resin composition, an ink jet head having the photo-curable resin layer, and a method of fabricating the same.
- An ink jet recording device functions to print an image by ejecting fine droplets of ink to a desired position of a recording medium.
- Such an ink jet recording device has been widely used since its price is low and numerous kinds of colors can be printed at a high resolution.
- the ink jet recording device basically includes an ink jet head for actually ejecting the ink and an ink container in fluid communication with the ink jet head.
- the ink stored in the ink container is supplied into the ink jet head through an ink channel, and the ink jet head ejects the ink supplied from the ink container to the recording medium to thereby complete a printing operation.
- An ink ejection type of the ink jet recording device is classified into an electro-thermal transducer type (hereinafter, referred to as “bubble-jet type”) ejecting the ink by generating bubbles in the ink using a heat source and an electro-mechanical transducer type ejecting the ink by controlling a change of an ink volume using deformation of a piezo-electric body used therein.
- bubble-jet type an electro-thermal transducer type
- FIG. 1 is a perspective view illustrating a conventional bubble-jet ink jet head disclosed in U.S. Pat. No. 4,882,595.
- the bubble-jet ink jet print head includes a substrate 10 , a chamber plate 14 disposed on the substrate 10 to form an ink chamber 12 for receiving the ink, a heat-generating resistor 16 disposed in the ink chamber 12 , and a nozzle plate 20 having a nozzle 18 for ejecting the ink.
- the ink is filled in the ink chamber 12 through a restrictor 22 , and also filled in the nozzle 18 in fluid communication with the ink chamber 12 using a capillary phenomenon.
- the heat-generating resistor 16 When the heat-generating resistor 16 is energized, the heat-generating resistor 16 generates heat to form bubbles in the ink filled in the ink chamber 12 .
- the ink filled in the ink chamber 12 is pressurized to eject the ink through the nozzle 18 .
- each component disclosed hereinabove should satisfy predetermined conditions.
- the chamber plate 14 and the nozzle plate 20 should satisfy the following conditions as a structure for forming a fluid channel (hereinafter, referred to as “fluid channel structure”), in which the ink is moved and temporarily stored. That is, the chamber plate 14 and the nozzle plate 20 should have a high mechanical strength for maintaining a structural shape, the substrate 10 and other layers should have good adhesive properties, and the ink should have corrosion resistance properties.
- the chamber plate 14 and the nozzle plate 20 should have a fine structure so as to perform patterning, and should also have good photosensitivity and resolution for patterning the chamber plate 14 and the nozzle plate 20 .
- U.S. Pat. No. 4,623,676 discloses a photo-curable composition containing a polymerizable acrylic compound, a polymerizable epoxy functional silane, and a free radical aromatic complex salt photo-initiator.
- U.S. Pat. No. 5,907,333 discloses a photo-curable resin composition containing a di-functional epoxy compound, a multi-functional epoxy compound, an aromatic complex salt photo-initiator and a non-photo reactive solvent.
- U.S. Pat. No. 4,090,936, U.S. Pat. No. 5,478,606, etc. discloses various photo-curable resin compositions.
- none of the disclosed photo-curable resign compositions entirely satisfy the conditions described above. Therefore, the research on the fluid channel structure needs to be continuously performed to satisfy at least the above conditions.
- a photo-curable resin composition which adopts a photo-catalyst as a photo-initiator, a method of patterning a photo-curable resin layer formed of the photo-curable resin composition, and an ink jet head having the photo-curable resin layer, and a method of fabricating the same.
- a photo-curable resin composition including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent.
- the photo-catalyst may be a material to generate electron-hole pairs.
- the photo-catalyst may be one selected from a group consisting of TiO 2 , CdS, Si, SrTiO 3 , WO, ZnO, SnO 2 , CdSe and CdTe.
- the epoxy compound may include a di-functional epoxy compound and a multi-functional epoxy compound.
- the non-photo reactive solvent may be one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene.
- the photo-curable resin composition may include the epoxy compound of about 60 wt %, the photo-catalyst of about 2 ⁇ 10 wt %, and the non-photo reactive solvent of about 10 ⁇ 40 wt %.
- an ink jet head including a photo-curable resin layer made of a photo-curable resin composition.
- the ink jet head may include a substrate having a pressure-generating element to generate a pressure for ink ejection.
- a chamber plate formed by patterning the photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent can be disposed on the substrate, while a sidewall of a fluid channel through which the ink is moved is configured.
- a nozzle plate having a nozzle corresponding to the pressure-generating element can be disposed on the chamber plate.
- the chamber plate and/or the nozzle plate may be a resin layer formed by patterning the novel photo-curable resin layer.
- the foregoing and/or other aspects of the present general inventive concept may also be achieved by providing a method of fabricating the ink jet head, the method including preparing a substrate having a pressure-generating element to generate pressure for ink ejection, and forming on the substrate a chamber plate configuring a sidewall of a fluid channel, through which ink is moved, and a nozzle plate configuring an upper surface of the fluid channel and having a nozzle corresponding to the pressure-generating element, wherein at least the chamber plate can be formed by patterning a photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent.
- the chamber plate and/or the nozzle plate may be formed by patterning the photo-curable resin layer.
- the method of fabricating the ink jet head may include patterning the photo-curable resin layer.
- the photo-curable resin layer may be patterned by a photolithography process.
- the patterning of the photo-curable resin layer may include forming the photo-curable resin layer on the substrate.
- the photo-curable resin layer can be selectively exposed using a photo-mask. Next, unexposed portions of the photo-curable resin layer can be removed.
- FIG. 1 is a perspective view illustrating a conventional bubble-jet ink jet print head
- FIGS. 2 to 6 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with one embodiment of the present general inventive concept.
- FIGS. 7 and 8 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with another embodiment of the present general inventive concept.
- pressure-generating elements 102 to generate pressure for ink ejection can be disposed on a substrate 100 .
- the substrate 100 can be a silicone substrate having a thickness of about 500 ⁇ m. It is effective in mass production since the silicone substrate widely used in manufacturing a semiconductor device can be used as it is.
- the pressure-generating-elements 102 may be a heat-generating resistor made of a high-resistance metal such as a tantalum-aluminum alloy.
- a chamber plate 104 ′ can be disposed on the substrate having the pressure-generating elements 102 .
- the chamber plate 104 ′ configures a sidewall of a fluid channel including a pressure chamber 118 and a restrictor 120 .
- a nozzle plate 112 having nozzles 114 corresponding to the pressure-generating elements 102 can be disposed on the chamber plate 104 ′.
- An ink supply hole 116 passing through the substrate 100 can be disposed on a center portion of the substrate 100 .
- the ink stored in the ink chamber 118 can be instantly heated by a heat-generating unit, i.e., the pressure-generating element 102 , to be ejected in a shape of a droplet through the nozzles 114 by the pressure generated by the pressure-generating elements 102 .
- the chamber plate 104 ′ and/or the nozzle plate 112 can be made of a novel photo-curable resin composition including a photo-catalyst as a photo-initiator.
- the photo-curable resin composition may include an epoxy compound, a photo-catalyst, and a non-photo reactive solvent.
- the photo-curable resin composition may include a photo-catalyst as a photo-initiator to induce a cross-link between epoxy compounds existing in a monomer or oligomer state.
- the epoxy compound may include a multi-functional epoxy compound and a di-functional epoxy compound.
- the multi-functional epoxy compound functions to increase cross-link density to improve resolution and solvent swelling.
- the multi-functional epoxy compound may be, for example, a novolac epoxy resin.
- the novolac epoxy resin is available from Dow Chemical Company, as a trade name entitled “D.E.N. 431”.
- the di-functional epoxy compound functions to add tensile strength and elastomeric properties to a resin layer.
- the di-functional epoxy compound may be, for example, diglycidyl ether bisphenol A, available from Shell Chemical Company, as a trade name entitled “EPON1010F, EPON828 or EPON1004”.
- the epoxy compound including the multi-functional epoxy compound and the di-functional epoxy compound may have about 60 wt % with respect to a total weight of the resin composition.
- the photo-catalyst can be provided as the photo-initiator to induce the cross-link between the epoxy compounds.
- the photo-catalyst may be a material to generate electron-hole pairs using light energy.
- the photo-catalyst may be one selected from a group consisting of TiO 2 , CdS, Si, SrTiO 3 , WO, ZnO, SnO 2 , CdSe and CdTe.
- the generated electron-hole pairs can be interacted with oxygen of an epoxy radical composing the epoxy compound, and the oxygen forming an epoxy ring may have a negative polarity compared to carbon, thus weakening a bonding strength between the oxygen and the carbon.
- a ring opening in which one of two bondings between the oxygen and the carbon forming the epoxy ring is cut off, can be generated, and the carbon can be bonded to oxygen of another epoxy ring.
- the epoxy compound can be changed from a low molecular weight to a high molecular weight through the ring opening and the cross-link, and a high molecular chain can form a network structure to be cured.
- the photo-catalyst may have about 2 ⁇ 10 wt % with respect to a total weight of the resin composition.
- the non-photo reactive solvent which is capable of dissolving the epoxy compound and the photo-catalyst, may be, for example, one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene.
- the non-photo reactive solvent may have about 10 ⁇ 40 wt % with respect to the total weight of the resin composition.
- the photo-curable resin composition may add selective additives, such as silane coupling to improve adhesive properties, to the substrate and may also add a dye or surfactant to adjust an extinction coefficient of the photo-curable resin composition, to the substrate.
- the ink jet head may have the chamber plate 104 ′ and/or the nozzle plate 112 made of the photo-curable epoxy resin composition including the photo-catalyst as the photo-initiator.
- the embodiment of the present general inventive concept has been described about the bubble-jet ink jet head employing a top shooting method, the present general inventive concept will not be limited thereto, and the photo-curable epoxy resin can be applied as materials for various fluid channel structures forming the fluid channel.
- FIGS. 2 to 6 are cross-sectional views illustrating the method of fabricating the ink jet head according to another embodiment of the present general inventive concept.
- a substrate 100 can be prepared.
- the substrate 100 may be a silicone substrate used in a process of manufacturing a semiconductor device.
- Pressure-generating elements 102 are formed on the substrate 100 .
- the pressure-generating elements 102 may be a heat-generating resistor made of a high-resistance metal, such as a tantalum-aluminum alloy.
- interconnection lines to supply electrical signals to the pressure-generating elements 102 a conductive pad to electrically connect the pressure-generating elements 102 to an external circuit, a silicone oxide heat barrier layer to cover the substrate 100 , and a passivation layer to protect the above structures may be formed on the substrate 100 .
- a formation method and a material of the structures including the pressure-generating elements 102 will not be intended to limit the scope of the present general inventive concept, and it will be understood that the method and the material can be variously modified by technologies known to those skilled in the art. Therefore, their descriptions will be omitted.
- a photo-curable resin layer 104 can be formed on the substrate 100 having the pressure-generating elements 102 .
- the photo-curable resin layer 104 may be formed by a spin coating method.
- the photo-curable resin layer 104 can be formed of the photo-curable resin composition including an epoxy compound, a photo-catalyst provided as a photo-initiator, a non-photo reactive solvent, and a selective additive as described above.
- the photo-curable resin layer 104 can be patterned to form a chamber plate 104 ′ configuring a sidewall of a fluid channel through which the ink is moved. That is, the chamber plate 104 ′ can be formed by patterning the photo-curable resin layer 104 .
- the photo-curable resin layer 104 may be patterned by a photolithography process. More specifically, first, the photo-curable resin layer 104 is formed, and then a soft baking operation can be performed on the photo-curable resin layer 104 at low temperature in order to remove a solvent ingredient. Next, the photo-curable resin layer 104 can be selectively exposed using a first photo-mask 106 provided with a fluid channel pattern.
- UV or DUV (deep ultra violate) having a wavelength equal to or less than 400 nm for example, I-line having a wavelength of about 365 nm, KrF laser having a wavelength of about 248 nm, or ArF laser having a wavelength of about 193 nm, may be employed as a light source hv during the exposure operation.
- an exposed portion of the photo-curable resin layer 104 can be cross-linked by the photo-catalyst added as the photo-initiator to thereby be cured.
- An unexposed portion of the photo-curable resin layer 104 can still exist in a low molecular state, for example, a monomer or oligomer state.
- the unexposed portion of the photo-curable resin layer 104 can be removed.
- the unexposed portion of the photo-curable resin layer 104 may be easily removed using, for example, a solvent consisting of a developer, acetone, a halogen element, or an alkaline solvent.
- a post-exposure bake operation may be selectively performed.
- the post-exposure bake operation may be performed at a temperature of about 60 ⁇ 95° C. in order to further cure the photo-curable resin layer 104 at the exposed portion.
- a positive photo-resist can be formed to fill a space between the chamber plates 104 ′ so that the chamber plate 104 ′ is covered on an entire surface of the substrate 100 having the chamber plate 104 ′.
- a planarization process such as a chemical mechanical polishing (CMP) process, can be performed to expose an upper surface of the chamber plate 104 ′ to thereby form a sacrificial mold layer 108 filling between the chamber plates 104 ′.
- CMP chemical mechanical polishing
- a nozzle material layer can be formed on an entire surface of the chamber plate 104 ′ and the sacrificial mold layer 108 .
- the nozzle material layer may be formed of the photo-curable epoxy resin composition, which is the same material as the chamber plate 104 ′. After that, the nozzle material layer formed of the photo-curable epoxy resin composition can be patterned.
- the patterning of the nozzle material layer can be similar to the process of forming the chamber plate 104 ′ described above. Briefly describing, the nozzle material layer can be exposed to a light source hv using a second photo-mask 110 provided with a nozzle pattern. After that, an unexposed portion of the nozzle material layer can be removed using the solvent.
- a nozzle plate 112 having nozzles 114 corresponding to the pressure-generating elements 102 can be formed.
- the substrate 100 can be etched to form an ink supply hole 116 passing through the substrate 100 , and then the sacrificial mold layer 108 can be removed using an appropriate solvent. As a result, the fluid channel including the ink chamber 118 and the restrictor 120 can be formed at a region where the sacrificial mold layer 108 is removed.
- FIGS. 7 and 8 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with another embodiment of the present general inventive concept.
- a chamber plate and a nozzle plate may be simultaneously formed by one photolithography process.
- a sacrificial mold layer 304 can be formed on a substrate 300 provided with pressure-generating elements 302 .
- the sacrificial mold layer 304 may be formed by patterning a positive photo-resist using a photolithography process.
- the sacrificial mold layer 304 is formed on the substrate 300 to cover a region where a fluid channel is to be formed.
- a photo-curable epoxy resin layer covering the sacrificial mold layer 304 can be formed on the substrate having the sacrificial mold layer 304 .
- the photo-curable epoxy resin layer may include an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent.
- the photo-curable epoxy resin layer can be exposed to a light source hv using a photo-mask 304 provided with a nozzle pattern.
- a fluid channel structure 306 having nozzles 308 corresponding to the pressure-generating elements 302 can be formed on the substrate 300 .
- the present general inventive concept may form the fluid channel structure forming the fluid channel of the ink jet head using the photo-curable resin composition including the photo-catalyst provided as the photo-initiator.
Abstract
A photo-curable resin composition, a method of patterning the same, an ink jet head, and a method of fabricating the same. The photo-curable resin composition includes an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. The photo-catalyst may be a semiconductor material to generate electron-hall pairs using light energy. The semiconductor material is one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe, CdSe and CdTe. The epoxy compound may include a di-functional epoxy compound and a multi-functional epoxy compound. The non-photo reactive solvent may be one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene. The photo-curable resin composition is patterned to form a fluid channel structure of the ink jet head.
Description
- This application is a divisional application of Ser. No. 11/004,939, filed Dec. 7, 2004, which claims the benefit of Korean Patent Application No. 2004-34430, filed May 14, 2004, the disclosure of which is hereby incorporated herein by reference in its entirety.
- 1. Field of the Invention
- The present general inventive concept relates to a photo-curable resin composition, a method of patterning the photo-curable resin composition layer, and an ink jet head and method of fabricating the same and, more particularly, to a photo-curable resin composition including a photo-catalyst as a photo-initiator, a method of patterning a photo-curable resin layer made of the photo-curable resin composition, an ink jet head having the photo-curable resin layer, and a method of fabricating the same.
- 2. Description of the Related Art
- An ink jet recording device functions to print an image by ejecting fine droplets of ink to a desired position of a recording medium. Such an ink jet recording device has been widely used since its price is low and numerous kinds of colors can be printed at a high resolution. The ink jet recording device basically includes an ink jet head for actually ejecting the ink and an ink container in fluid communication with the ink jet head. The ink stored in the ink container is supplied into the ink jet head through an ink channel, and the ink jet head ejects the ink supplied from the ink container to the recording medium to thereby complete a printing operation. An ink ejection type of the ink jet recording device is classified into an electro-thermal transducer type (hereinafter, referred to as “bubble-jet type”) ejecting the ink by generating bubbles in the ink using a heat source and an electro-mechanical transducer type ejecting the ink by controlling a change of an ink volume using deformation of a piezo-electric body used therein.
-
FIG. 1 is a perspective view illustrating a conventional bubble-jet ink jet head disclosed in U.S. Pat. No. 4,882,595. - Referring to
FIG. 1 , the bubble-jet ink jet print head includes asubstrate 10, achamber plate 14 disposed on thesubstrate 10 to form anink chamber 12 for receiving the ink, a heat-generatingresistor 16 disposed in theink chamber 12, and anozzle plate 20 having anozzle 18 for ejecting the ink. The ink is filled in theink chamber 12 through arestrictor 22, and also filled in thenozzle 18 in fluid communication with theink chamber 12 using a capillary phenomenon. When the heat-generatingresistor 16 is energized, the heat-generatingresistor 16 generates heat to form bubbles in the ink filled in theink chamber 12. As the bubbles are expanded, the ink filled in theink chamber 12 is pressurized to eject the ink through thenozzle 18. - In order to make the ink jet printer operate reliably and stably, each component disclosed hereinabove should satisfy predetermined conditions. In particular, the
chamber plate 14 and thenozzle plate 20 should satisfy the following conditions as a structure for forming a fluid channel (hereinafter, referred to as “fluid channel structure”), in which the ink is moved and temporarily stored. That is, thechamber plate 14 and thenozzle plate 20 should have a high mechanical strength for maintaining a structural shape, thesubstrate 10 and other layers should have good adhesive properties, and the ink should have corrosion resistance properties. In addition, thechamber plate 14 and thenozzle plate 20 should have a fine structure so as to perform patterning, and should also have good photosensitivity and resolution for patterning thechamber plate 14 and thenozzle plate 20. - Research on a photo-curable resin composition as a material of a fluid channel structure satisfying the above-described conditions has been performed. For example, U.S. Pat. No. 4,623,676 discloses a photo-curable composition containing a polymerizable acrylic compound, a polymerizable epoxy functional silane, and a free radical aromatic complex salt photo-initiator. Further, U.S. Pat. No. 5,907,333 discloses a photo-curable resin composition containing a di-functional epoxy compound, a multi-functional epoxy compound, an aromatic complex salt photo-initiator and a non-photo reactive solvent.
- Furthermore, U.S. Pat. No. 4,090,936, U.S. Pat. No. 5,478,606, etc., discloses various photo-curable resin compositions. However, none of the disclosed photo-curable resign compositions entirely satisfy the conditions described above. Therefore, the research on the fluid channel structure needs to be continuously performed to satisfy at least the above conditions.
- In order to solve the foregoing and/or other problems, it is an aspect of the general inventive concept to provide a photo-curable resin composition, which adopts a photo-catalyst as a photo-initiator, a method of patterning a photo-curable resin layer formed of the photo-curable resin composition, and an ink jet head having the photo-curable resin layer, and a method of fabricating the same.
- Additional aspects and advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
- The foregoing and/or other aspects of the present general inventive concept may be achieved by providing a photo-curable resin composition including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. The photo-catalyst may be a material to generate electron-hole pairs. For example, the photo-catalyst may be one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe.
- The epoxy compound may include a di-functional epoxy compound and a multi-functional epoxy compound. The non-photo reactive solvent may be one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene.
- In an aspect of the present general inventive concept, the photo-curable resin composition may include the epoxy compound of about 60 wt %, the photo-catalyst of about 2˜10 wt %, and the non-photo reactive solvent of about 10˜40 wt %.
- The foregoing and/or other aspects of the present general inventive concept, may also be achieved by providing an ink jet head including a photo-curable resin layer made of a photo-curable resin composition. The ink jet head may include a substrate having a pressure-generating element to generate a pressure for ink ejection. A chamber plate formed by patterning the photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent can be disposed on the substrate, while a sidewall of a fluid channel through which the ink is moved is configured. A nozzle plate having a nozzle corresponding to the pressure-generating element can be disposed on the chamber plate. In another aspect of the present general inventive concept, the chamber plate and/or the nozzle plate may be a resin layer formed by patterning the novel photo-curable resin layer.
- The foregoing and/or other aspects of the present general inventive concept may also be achieved by providing a method of fabricating the ink jet head, the method including preparing a substrate having a pressure-generating element to generate pressure for ink ejection, and forming on the substrate a chamber plate configuring a sidewall of a fluid channel, through which ink is moved, and a nozzle plate configuring an upper surface of the fluid channel and having a nozzle corresponding to the pressure-generating element, wherein at least the chamber plate can be formed by patterning a photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. In an aspect of the present general inventive concept, the chamber plate and/or the nozzle plate may be formed by patterning the photo-curable resin layer.
- In another aspect of the present general inventive concept, the method of fabricating the ink jet head may include patterning the photo-curable resin layer. The photo-curable resin layer may be patterned by a photolithography process. The patterning of the photo-curable resin layer may include forming the photo-curable resin layer on the substrate. The photo-curable resin layer can be selectively exposed using a photo-mask. Next, unexposed portions of the photo-curable resin layer can be removed.
- These and/or other aspects and advantages of the present general inventive concept will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
-
FIG. 1 is a perspective view illustrating a conventional bubble-jet ink jet print head; - FIGS. 2 to 6 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with one embodiment of the present general inventive concept; and
-
FIGS. 7 and 8 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with another embodiment of the present general inventive concept. - The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. Like numbers refer to like elements throughout the specification.
- First, an ink jet head in accordance with an embodiment of the present general inventive concept will be described with reference to
FIG. 6 . - Referring to
FIG. 6 , pressure-generatingelements 102 to generate pressure for ink ejection can be disposed on asubstrate 100. Thesubstrate 100 can be a silicone substrate having a thickness of about 500 μm. It is effective in mass production since the silicone substrate widely used in manufacturing a semiconductor device can be used as it is. The pressure-generating-elements 102 may be a heat-generating resistor made of a high-resistance metal such as a tantalum-aluminum alloy. Achamber plate 104′ can be disposed on the substrate having the pressure-generatingelements 102. Thechamber plate 104′ configures a sidewall of a fluid channel including apressure chamber 118 and arestrictor 120. Anozzle plate 112 havingnozzles 114 corresponding to the pressure-generatingelements 102 can be disposed on thechamber plate 104′. Anink supply hole 116 passing through thesubstrate 100 can be disposed on a center portion of thesubstrate 100. - The ink supplied from an ink container, such as a cartridge (not shown), can pass through the
ink supply hole 116 and the restrictor 120 sequentially to be temporarily stored in theink chamber 118. The ink stored in theink chamber 118 can be instantly heated by a heat-generating unit, i.e., the pressure-generatingelement 102, to be ejected in a shape of a droplet through thenozzles 114 by the pressure generated by the pressure-generatingelements 102. - In an aspect of the present general inventive concept, the
chamber plate 104′ and/or thenozzle plate 112 can be made of a novel photo-curable resin composition including a photo-catalyst as a photo-initiator. The photo-curable resin composition may include an epoxy compound, a photo-catalyst, and a non-photo reactive solvent. The photo-curable resin composition may include a photo-catalyst as a photo-initiator to induce a cross-link between epoxy compounds existing in a monomer or oligomer state. - Hereinafter, each component of the photo-curable resin composition will be described.
- First, the epoxy compound may include a multi-functional epoxy compound and a di-functional epoxy compound. The multi-functional epoxy compound functions to increase cross-link density to improve resolution and solvent swelling. The multi-functional epoxy compound may be, for example, a novolac epoxy resin. The novolac epoxy resin is available from Dow Chemical Company, as a trade name entitled “D.E.N. 431”. The di-functional epoxy compound functions to add tensile strength and elastomeric properties to a resin layer. The di-functional epoxy compound may be, for example, diglycidyl ether bisphenol A, available from Shell Chemical Company, as a trade name entitled “EPON1010F, EPON828 or EPON1004”. In an aspect of the present general inventive concept, the epoxy compound including the multi-functional epoxy compound and the di-functional epoxy compound may have about 60 wt % with respect to a total weight of the resin composition.
- The photo-catalyst can be provided as the photo-initiator to induce the cross-link between the epoxy compounds. The photo-catalyst may be a material to generate electron-hole pairs using light energy. In an aspect of the present general inventive concept, the photo-catalyst may be one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe. When the photo-catalyst is exposed by a light source having a wavelength equal to or less than 400 nm to be energized, electrons exiting in a valence band can be excited to a conduction band to generate the electron-hole pairs. The generated electron-hole pairs can be interacted with oxygen of an epoxy radical composing the epoxy compound, and the oxygen forming an epoxy ring may have a negative polarity compared to carbon, thus weakening a bonding strength between the oxygen and the carbon. As a result, a ring opening, in which one of two bondings between the oxygen and the carbon forming the epoxy ring is cut off, can be generated, and the carbon can be bonded to oxygen of another epoxy ring. The epoxy compound can be changed from a low molecular weight to a high molecular weight through the ring opening and the cross-link, and a high molecular chain can form a network structure to be cured. In this embodiment of the present general inventive concept, the photo-catalyst may have about 2˜10 wt % with respect to a total weight of the resin composition.
- Next, the non-photo reactive solvent, which is capable of dissolving the epoxy compound and the photo-catalyst, may be, for example, one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene. The non-photo reactive solvent may have about 10˜40 wt % with respect to the total weight of the resin composition. Besides, the photo-curable resin composition may add selective additives, such as silane coupling to improve adhesive properties, to the substrate and may also add a dye or surfactant to adjust an extinction coefficient of the photo-curable resin composition, to the substrate.
- As described above, the ink jet head may have the
chamber plate 104′ and/or thenozzle plate 112 made of the photo-curable epoxy resin composition including the photo-catalyst as the photo-initiator. Although the embodiment of the present general inventive concept has been described about the bubble-jet ink jet head employing a top shooting method, the present general inventive concept will not be limited thereto, and the photo-curable epoxy resin can be applied as materials for various fluid channel structures forming the fluid channel. - Hereinafter, a method of fabricating an ink jet head in accordance with another embodiment of the present general inventive concept will be described.
- FIGS. 2 to 6 are cross-sectional views illustrating the method of fabricating the ink jet head according to another embodiment of the present general inventive concept.
- Referring to
FIG. 2 , asubstrate 100 can be prepared. Thesubstrate 100 may be a silicone substrate used in a process of manufacturing a semiconductor device. Pressure-generatingelements 102 are formed on thesubstrate 100. In an aspect of the present general inventive concept, the pressure-generatingelements 102 may be a heat-generating resistor made of a high-resistance metal, such as a tantalum-aluminum alloy. Besides, interconnection lines to supply electrical signals to the pressure-generatingelements 102, a conductive pad to electrically connect the pressure-generatingelements 102 to an external circuit, a silicone oxide heat barrier layer to cover thesubstrate 100, and a passivation layer to protect the above structures may be formed on thesubstrate 100. A formation method and a material of the structures including the pressure-generatingelements 102 will not be intended to limit the scope of the present general inventive concept, and it will be understood that the method and the material can be variously modified by technologies known to those skilled in the art. Therefore, their descriptions will be omitted. - A photo-
curable resin layer 104 can be formed on thesubstrate 100 having the pressure-generatingelements 102. The photo-curable resin layer 104 may be formed by a spin coating method. The photo-curable resin layer 104 can be formed of the photo-curable resin composition including an epoxy compound, a photo-catalyst provided as a photo-initiator, a non-photo reactive solvent, and a selective additive as described above. - Referring to
FIG. 3 , the photo-curable resin layer 104 can be patterned to form achamber plate 104′ configuring a sidewall of a fluid channel through which the ink is moved. That is, thechamber plate 104′ can be formed by patterning the photo-curable resin layer 104. The photo-curable resin layer 104 may be patterned by a photolithography process. More specifically, first, the photo-curable resin layer 104 is formed, and then a soft baking operation can be performed on the photo-curable resin layer 104 at low temperature in order to remove a solvent ingredient. Next, the photo-curable resin layer 104 can be selectively exposed using a first photo-mask 106 provided with a fluid channel pattern. UV or DUV (deep ultra violate) having a wavelength equal to or less than 400 nm, for example, I-line having a wavelength of about 365 nm, KrF laser having a wavelength of about 248 nm, or ArF laser having a wavelength of about 193 nm, may be employed as a light source hv during the exposure operation. As a result of the exposure operation, an exposed portion of the photo-curable resin layer 104 can be cross-linked by the photo-catalyst added as the photo-initiator to thereby be cured. An unexposed portion of the photo-curable resin layer 104 can still exist in a low molecular state, for example, a monomer or oligomer state. Then, the unexposed portion of the photo-curable resin layer 104 can be removed. The unexposed portion of the photo-curable resin layer 104 may be easily removed using, for example, a solvent consisting of a developer, acetone, a halogen element, or an alkaline solvent. As a result, as shown inFIG. 3 , thechamber plate 104′ can be formed on thesubstrate 100. In the meantime, before the unexposed portion is removed, a post-exposure bake operation may be selectively performed. The post-exposure bake operation may be performed at a temperature of about 60˜95° C. in order to further cure the photo-curable resin layer 104 at the exposed portion. - After the
chamber plate 104′ is formed, a process of forming a nozzle plate having a nozzle to eject the ink on thechamber plate 104′ is performed. The nozzle plate may be formed by various methods. For example, the nozzle plate may be formed of a metal, such as nickel, using an electro-forming, then may be attached to thechamber plate 104′. In an aspect of the present general inventive concept, the nozzle plate can be monolithically formed using the same material as thechamber plate 104′. Hereinafter, a method of monolithically forming the nozzle plate will be described. - Referring to
FIG. 4 , a positive photo-resist can be formed to fill a space between thechamber plates 104′ so that thechamber plate 104′ is covered on an entire surface of thesubstrate 100 having thechamber plate 104′. After that, a planarization process, such as a chemical mechanical polishing (CMP) process, can be performed to expose an upper surface of thechamber plate 104′ to thereby form asacrificial mold layer 108 filling between thechamber plates 104′. In the meantime, a thickness of thechamber plate 104′ may be somewhat decreased while performing the CMP process. - Referring to
FIG. 5 , a nozzle material layer can be formed on an entire surface of thechamber plate 104′ and thesacrificial mold layer 108. The nozzle material layer may be formed of the photo-curable epoxy resin composition, which is the same material as thechamber plate 104′. After that, the nozzle material layer formed of the photo-curable epoxy resin composition can be patterned. The patterning of the nozzle material layer can be similar to the process of forming thechamber plate 104′ described above. Briefly describing, the nozzle material layer can be exposed to a light source hv using a second photo-mask 110 provided with a nozzle pattern. After that, an unexposed portion of the nozzle material layer can be removed using the solvent. As a result, as shown inFIG. 5 , anozzle plate 112 havingnozzles 114 corresponding to the pressure-generatingelements 102 can be formed. - Referring to
FIG. 6 , thesubstrate 100 can be etched to form anink supply hole 116 passing through thesubstrate 100, and then thesacrificial mold layer 108 can be removed using an appropriate solvent. As a result, the fluid channel including theink chamber 118 and the restrictor 120 can be formed at a region where thesacrificial mold layer 108 is removed. -
FIGS. 7 and 8 are cross-sectional views illustrating a method of fabricating an ink jet head in accordance with another embodiment of the present general inventive concept. In an aspect of the present general inventive concept, a chamber plate and a nozzle plate may be simultaneously formed by one photolithography process. - Referring to
FIGS. 7 and 8 , asacrificial mold layer 304 can be formed on asubstrate 300 provided with pressure-generatingelements 302. Thesacrificial mold layer 304 may be formed by patterning a positive photo-resist using a photolithography process. Thesacrificial mold layer 304 is formed on thesubstrate 300 to cover a region where a fluid channel is to be formed. Next, a photo-curable epoxy resin layer covering thesacrificial mold layer 304 can be formed on the substrate having thesacrificial mold layer 304. As described above, the photo-curable epoxy resin layer may include an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent. Next, as shown inFIG. 8 , the photo-curable epoxy resin layer can be exposed to a light source hv using a photo-mask 304 provided with a nozzle pattern. As a result, afluid channel structure 306 havingnozzles 308 corresponding to the pressure-generatingelements 302 can be formed on thesubstrate 300. After that, subsequent processes described in previous embodiment of the present general inventive concept can be performed to form an ink supply hole and remove thesacrificial mold layer 304. - As described above, the present general inventive concept may form the fluid channel structure forming the fluid channel of the ink jet head using the photo-curable resin composition including the photo-catalyst provided as the photo-initiator.
- Although a few embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the appended claims and their equivalents.
Claims (22)
1. A photo-curable resin composition comprising:
an epoxy compound;
a photo-catalyst provided as a photo-initiator; and
a non-photo reactive solvent.
2. The photo-curable resin composition according to claim 1 , wherein the photo-catalyst comprises a semiconductor material to generate electron-hall pairs using light energy.
3. The photo-curable resin composition according to claim 2 , wherein the photo-catalyst comprises one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe.
4. The photo-curable resin composition according to claim 2 , wherein the epoxy compound comprises a di-functional epoxy compound and a multi-functional epoxy compound.
5. The photo-curable resin composition according to claim 4 , wherein the epoxy compound has about 60 wt %, the photo-catalyst has about 2˜10 wt %, and the non-photo reactive solvent has about 10˜40 wt %.
6. The photo-curable resin composition according to claim 2 , wherein the non-photo reactive solvent comprises one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene.
7. A method of patterning a photo-curable resin layer, comprising:
forming a photo-curable resin layer on a substrate, the photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent;
selectively exposing the photo-curable resin layer using a photo-mask; and
removing an unexposed portion of the photo-curable resin layer.
8. The method according to claim 7 , wherein the photo-catalyst comprises a semiconductor material to generate electron-hall pairs by means of light energy.
9. The method according to claim 8 , wherein the photo-catalyst comprises one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe.
10. The method according to claim 8 , wherein the epoxy compound comprises a di-functional epoxy compound and a multi-functional epoxy compound.
11. The method according to claim 10 , wherein the photo-curable resin layer comprises the epoxy compound of about 60 wt %, the photo-catalyst of about 2˜10 wt %, and the non-photo reactive solvent of about 10˜40 wt %.
12. The method according to claim 8 , wherein the non-photo reactive solvent comprises one or a mixture selected from a group consisting of gamma-butyrolactone (GBL), cyclopentanone, C1-6 acetate, tetrahydrofurane (THF), and xylene.
13. A method of fabricating an ink jet head comprising:
preparing a substrate having a pressure-generating element to generate a pressure for ink ejection; and
forming on the substrate a chamber plate to configure a sidewall of a fluid channel through which ink is moved, and a nozzle plate to configure an upper surface of the fluid channel and having a nozzle corresponding to the pressure-generating element,
wherein at least one of the chamber plate and the nozzle plate is formed by patterning a photo-curable resin layer including an epoxy compound, a photo-catalyst provided as a photo-initiator, and a non-photo reactive solvent.
14. The method according to claim 13 , wherein the photo-catalyst comprises a semiconductor material to generate electron-hall pairs using light energy.
15. The method according to claim 14 , wherein the photo-catalyst comprises one selected from a group consisting of TiO2, CdS, Si, SrTiO3, WO, ZnO, SnO2, CdSe and CdTe.
16. The method according to claim 14 , wherein the epoxy compound comprises a di-functional epoxy compound and a multi-functional epoxy compound.
17. The method according to claim 16 , wherein the photo-curable resin layer comprises the epoxy compound of about 60 wt %, the photo-catalyst of about 2˜10 wt %, and the non-photo reactive solvent of about 10˜40 wt %.
18. The method according to claim 13 , wherein the forming of the chamber plate and the nozzle plate comprises:
forming the nozzle plate using another photo-curable resin layer, so that the chamber plate and the nozzle plate are formed in a monolithic single body.
19. The method according to claim 13 , wherein the forming of the chamber plate and the nozzle plate comprises:
forming the photo-curable epoxy resin layer on the substrate to form both the nozzle plate and the chamber plate.
20. The method according to claim 19 , wherein the forming of the photo-curable epoxy resin layer comprises selectively exposing the photo-curable epoxy resin layer to change a state of the epoxy compound using a characteristic of the photo-catalyst.
21. The method according to claim 19 , wherein the forming of the chamber plate and the nozzle plate comprises:
exposing the photo-curable resin layer to a light source so that the photo-catalyst induces a cross-link and a ring opening relating to the epoxy compound.
22. The method according to claim 21 , wherein the exposing of the photo-catalyst to the light source comprises:
changing the epoxy compound between a low molecular chain and a high molecular chain so that the epoxy compound is cured to a network structure.
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US20080001332A1 (en) * | 2006-06-30 | 2008-01-03 | Lg.Philips Lcd Co., Ltd. | Method of fabricating a mold |
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JP3777594B2 (en) * | 2001-12-27 | 2006-05-24 | ソニー株式会社 | Ink ejection device |
US20050170670A1 (en) * | 2003-11-17 | 2005-08-04 | King William P. | Patterning of sacrificial materials |
KR100670004B1 (en) * | 2005-02-25 | 2007-01-19 | 삼성전자주식회사 | Ink jet printhead |
KR20080086306A (en) * | 2007-03-22 | 2008-09-25 | 삼성전자주식회사 | Method for manufacturing ink-jet print head |
KR20080102001A (en) * | 2007-05-17 | 2008-11-24 | 삼성전자주식회사 | Method of manufacturing thermal inkjet printhead |
KR20080114358A (en) * | 2007-06-27 | 2008-12-31 | 삼성전자주식회사 | Method of manufacturing inkjet printhead |
KR20140145933A (en) * | 2012-01-25 | 2014-12-24 | 데쿠세리아루즈 가부시키가이샤 | Method of manufacturing image display device |
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JP3672414B2 (en) | 1997-07-01 | 2005-07-20 | タムラ化研株式会社 | Photosensitive resin composition |
KR100396559B1 (en) | 2001-11-05 | 2003-09-02 | 삼성전자주식회사 | Method for manufacturing monolithic inkjet printhead |
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2004
- 2004-05-14 KR KR1020040034430A patent/KR100590881B1/en not_active IP Right Cessation
- 2004-12-07 US US11/004,939 patent/US7278709B2/en not_active Expired - Fee Related
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2007
- 2007-09-06 US US11/850,938 patent/US20080063978A1/en not_active Abandoned
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US3205157A (en) * | 1962-03-13 | 1965-09-07 | North American Aviation Inc | Electromagnetic radiation polymerization |
US4985340A (en) * | 1988-06-01 | 1991-01-15 | Minnesota Mining And Manufacturing Company | Energy curable compositions: two component curing agents |
US5639413A (en) * | 1995-03-30 | 1997-06-17 | Crivello; James Vincent | Methods and compositions related to stereolithography |
US5907333A (en) * | 1997-03-28 | 1999-05-25 | Lexmark International, Inc. | Ink jet print head containing a radiation curable resin layer |
US6158843A (en) * | 1997-03-28 | 2000-12-12 | Lexmark International, Inc. | Ink jet printer nozzle plates with ink filtering projections |
US6057380A (en) * | 1997-08-22 | 2000-05-02 | Ciba Specialty Chemicals Corporation | Photogeneration of amines from α-aminoacetophenones |
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US20080001332A1 (en) * | 2006-06-30 | 2008-01-03 | Lg.Philips Lcd Co., Ltd. | Method of fabricating a mold |
US8480936B2 (en) | 2006-06-30 | 2013-07-09 | Lg Display Co., Ltd. | Method of fabricating a mold |
Also Published As
Publication number | Publication date |
---|---|
US7278709B2 (en) | 2007-10-09 |
KR100590881B1 (en) | 2006-06-19 |
US20050255409A1 (en) | 2005-11-17 |
KR20050108970A (en) | 2005-11-17 |
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Legal Events
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: S-PRINTING SOLUTION CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SAMSUNG ELECTRONICS CO., LTD;REEL/FRAME:041852/0125 Effective date: 20161104 |