Patent US2236688A successfully refreshed from Google Patents.
Patent US5214542A successfully refreshed from Google Patents.
US5214542A
Expired / Lapsed
US
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Method for producing color filter
Assignee: Eneos Corp
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Filing: 1992-03-03
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Granted: 1993-05-25
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Expires: 2012-03-03
Abstract
Abstract A method for producing a color filter involves the steps of: (A) forming a photosensitive coating film on a transparent electrically conductive layer formed on a surface of a transparent substrate, and exposing the photosensitive coating film through a mask having patterns of at least three different degrees of light transmittances; (B) developing and removing a photosensitive coating film portion registering with one of the patterns of smallest and largest degrees of light transmittances for exposing the transparent electrically conductive layer, and electrodepositing a colored coating on the exposed transparent electrically conductive layer for forming a colored layer thereon; and (C) repeating the step (B) for the respective patterns of different degrees of light transmittances in sequence of difference in transmittances for producing different colored layers, respectively.
Inventors
- 👤 Yukio Yamasita
- 👤 Toru Nakamura
- 👤 Haruyoshi Sato
- 👤 Hitoshi Yuasa
- 👤 Yutaka Otsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
129 words
A method for producing a color filter comprising the steps of: (A) forming a photosensitive coating film on a transparent electrically conductive layer formed on a surface of a transparent substrate, and exposing said photosensitive coating film to light through a mask having patterns of at least three different degrees of light transmittances; (B) developing and removing a photosensitive coating film portion registering with one of said patterns of smallest and largest degrees of light transmittances for exposing said transparent electrically conductive layer, and electrodepositing a colored coating on the exposed transparent electrically conductive layer for forming a colored layer thereon; and (C) repeating said step (B) for the respective patterns of different degrees of light transmittances in sequence of difference in transmittances for producing different colored layers, respectively.
Claim 2
Independent Claim
129 words
A method for producing a color filter comprising the steps of: (A) forming a photosensitive coating film on a transparent electrically conductive layer formed on a surface of a transparent substrate, and exposing said photosensitive coating film to light through a mask having patterns of at least three different degrees of light transmittances; (B) developing and removing a photosensitive coating film portion registering with one of said patterns of smallest and largest degrees of light transmittances for exposing said transparent electrically conductive layer, and electrodepositing a colored coating on the exposed transparent electrically conductive layer for forming a colored layer thereon; and (C) repeating said step (B) for the respective patterns of different degrees of light transmittances in sequence of difference in transmittances for producing different colored layers, respectively.
Claim 3
Dependent Claim
32 words
A method as claimed in claim 1 wherein a material of said transparent electrically conductive layer is selected from the group consisting of tin oxide, indium oxide, antimony oxide and mixtures thereof.
Claim 4
Dependent Claim
34 words
A method as claimed in claim 1 wherein said photosensitive coating film is formed by a method selected from the group consisting of electrodeposition, spraying, dip coating, roll coating, screen printing and spin coating.
Claim 5
Dependent Claim
51 words
A method as claimed in claim 1 wherein said photosensitive coating film is formed of a negative type photosensitive coating containing a negative type photosensitive coating resin exhibiting coating film forming capability and photosensitivity, a photopolymerization initiator and a solvent selected from the group consisting of an organic solvent and water.
Claim 6
Dependent Claim
23 words
A method as claimed in claim 4 wherein said negative type photosensitive coating resin has a molecular weight ranging between 500 and 10,000.
Claim 7
Dependent Claim
32 words
A method as claimed in claim 4 wherein said negative type photosensitive coating resin is a prepolymer selected from the group consisting of epoxy (meth)acrylate, urethane (meth)acrylate, polyester (meth)acrylate and mixtures thereof.
Claim 8
Dependent Claim
134 words
A method as claimed in claim 4 wherein said negative type photosensitive coating resin is an onium group-containing cationic resin prepared by introducing an onium group and a photosensitive group into a main resin and processing with an acidic material, said main resin being selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, epoxy resin, urethane resin, polybutadiene resin, polyamide resin and mixtures thereof, said onium group being selected from the group consisting of an amino group, an ammonium group, a sulfonium group and mixtures thereof, said photosensitive group being selected from the group consisting of an acryloyl group, a methacryloyl group, a cinnamoyl group and mixtures thereof, and said acidic material being selected from the group consisting of formic acid, acetic acid, propionic acid, lactic acid and mixtures thereof.
Claim 9
Dependent Claim
108 words
A method as claimed in claim 4 wherein said negative type photosensitive coating resin is a carboxyl group-containing anionic resin obtained by introducing a carboxyl group and a photosensitive group into a main resin and processing with a basic substance, said main resin being selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, polybutadiene resin, epoxy resin, urethane resin, polyamide resin and mixtures thereof, said photosensitive group being selected from the group consisting of an acryloyl group, a methacryloyl group, a cinnamoyl group and mixtures thereof, said basic substance being selected from the group consisting of triethylamine, diethylamine, dimethylethanol amine, ammonia and mixtures thereof.
Claim 10
Dependent Claim
32 words
A method as claimed in claim 4 wherein said photopolymerization initiator is selected from the group consisting of benzoins, benzoin ethers, benzylalkyl ketals, benzophenone derivatives, anthraquinone derivatives, thioxanthone derivatives and mixtures thereof.
Claim 11
Dependent Claim
34 words
A method as claimed in claim 4 wherein an added amount of said photopolymerization initiator is 0.1 to 30 parts by weight to 100 parts by weight of said negative type photosensitive coating resin.
Claim 12
Dependent Claim
78 words
A method as claimed in claim 4 wherein said organic solvent is selected from the group consisting of ethyleneglycol monobutyl ether, ethyleleglycol monohexyl ether, ethyleneglycol monophenyl ether, propyleneglycol monomethyl ether, propylneglycol monophenyl ether, diethyleneglycol dimethyl ether, triethyleneglycol dimethyl ether, acetone, methylethyl ketone, methylisobutyl ketone, cyclohexanone, isophorone, dibutyl ether, dioxane, tetrahydrofuran, methoxy butanol, diacetone alcohol, butanol, isopropanol, toluene, xylene, hexane, ethyl acetate, butyl acetate, 2-methoxyethyl acetate, 2-methoxypropyl acetate, ethyl benzoate, dimethyl formamide, N,N-dimethyl acetoamide, dimethyl sulfoxide and mixtures thereof.
Claim 13
Dependent Claim
27 words
A method as claimed in claim 4 wherein said negative type photosensitive coating contains a colorant selected from the group consisting of dyes, pigments and mixtures thereof.
Claim 14
Dependent Claim
26 words
A method as in claim 12 wherein said dyes comprise the group consisting of azo dyes, anthraquinone dyes, benzodifuranone dyes, condensed methine dyes and mixtures thereof.
Claim 15
Dependent Claim
58 words
A method as claimed in claim 12 wherein said pigments comprise the group consisting of azo lake organic pigments, quinacridone organic pigments, phthalocyanine organic pigments, isoindolinone organic pigments, anthraquinone organic pigments, thioindigo organic pigments, chrome yellow, iron oxide, chrome vermilion, chrome green, ultramarine, prussian blue, cobalt blue, cobalt green, emerald green, titanium white, carbon black and mixtures thereof.
Claim 16
Dependent Claim
32 words
A method as claimed in claim 12 wherein said colorant is used in an amount of 3 to 70 wt. % based on a total amount of the negative type photosensitive coating.
Claim 17
Dependent Claim
48 words
A method as claimed in claim 1 wherein said photosensitive coating film is formed of a positive type photosensitive coating containing a positive type photosensitive coating resin having coating film forming capability and photosensitivity and a solvent selected from the group consisting of an organic solvent and water.
Claim 18
Dependent Claim
123 words
A method as claimed in claim 16 wherein said positive type photosensitive coating resin is a quinone diazido group-containing cationic resin obtained by introducing an onium group and a hydroxyl group into a main resin, adding a quinone diazido sulfonic acid compound by esterification reaction and processing with an acidic material, said main resin being selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, epoxy resin, urethane resin, polybutadiene resin, polyamide resin and mixtures thereof, said onium group being selected from the group consisting of an amino group, an ammonium group, a sulfonium group and mixtures thereof, and said acidic material being selected from the group consisting of formic acid, acetic acid, propionic acid, lactic acid and mixtures thereof.
Claim 19
Dependent Claim
98 words
A method as claimed in claim 16 wherein said positive type photosensitive coating resin is a quinone diazido group-containing anionic resin obtained by introducing a carboxyl group and a hydroxyl group into a main resin, adding a quinone diazido sulfonic acid compound by esterification reaction and processing with a basic substance, said main resin being selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, polybutadiene resin, epoxy resin, urethane resin, polyamide resin and mixtures thereof, and said basic substance being selected from the group consisting of triethylamine, diethylamine, dimethylethanol amine, ammonia and mixtures thereof.
Claim 20
Dependent Claim
66 words
A method as claimed in claim 16 wherein said positive type photosensitive coating resin is a quinone diazido group-containing resin obtained by reacting a resin having film forming capability and a hydroxyl group-containing compound with a quinone diazido compound, said quinone diazido compound being selected from the group consisting of a quinone diazido sulfonic acid derivative-containing quinone diazido compound and an isocyanate group-containing quinone azido compound.
Claim 21
Dependent Claim
77 words
A method as claimed in claim 16 wherein said organic solvent is selected from the group consisting of ethyleneglycol monobutyl ether, ethylglycol monohexyl ether, ethyleneglycol monophenyl ether, propyleneglycol monomethyl ether, propyleneglycol monophenyl ether, diethyleneglycol dimethyl ether, triethyleneglycol dimethyl ether, acetone, methylethyl ketone, methylisobutyl ketone, cyclohexanone, isophorone, dibutyl ether, dioxane, tetrahydrofuran, methoxy butanol, diacetone alcohol, butanol, isopropanol, toluene, xylene, hexane, ethyl acetate, butyl acetate, 2-methoxyethyl acetate, 2-methoxypropyl acetate, ethyl benzoate, dimethylformamide, N,N-dimethyl acetoamide, dimethyl sulfoxide and mixtures thereof.
Claim 22
Dependent Claim
27 words
A method as claimed in claim 16 wherein said positive type photosensitive coating contains a colorant selected from the group consisting of dyes, pigments and mixtures thereof.
Claim 23
Dependent Claim
27 words
A method as claimed in claim 21 wherein said dyes comprise the group consisting of azo dyes, anthraquinone dyes, benzodifuranone dyes, condensed methine dyes and mixtures thereof.
Claim 24
Dependent Claim
56 words
A method as claimed in claim 21 wherein said pigments comprise the group consisting of azo lake organic pigments, quinacridone organic pigments, phthalocyanine organic pigments, isoindolinone organic pigments, anthraquinone organic pigments, thioindigo organic pigments, chrome yellow, iron oxide, chrome vermilion, chrome green, ultramarine, prussian blue, cobalt blue, cobalt green, emerald green, carbon black and mixtures thereof.
Claim 25
Dependent Claim
28 words
The method as claimed in claim 21 wherein 3 to 70 wt. % of said colorant is contained based on total weight of said positive type photosensitive coating.
Claim 26
Dependent Claim
26 words
A method as claimed in claim 1 wherein said mask is a negative mask and wherein said sequence is in an order of increasing light transmittances.
Claim 27
Dependent Claim
26 words
A mask as claimed in claim 1 wherein said mask is a positive mask and wherein said sequence is in an order of decreasing light transmittances.
Claim 28
Dependent Claim
51 words
A method as claimed in claim 1 wherein said photosensitive coating film is developed and removed by a developing solution selected from the group consisting of an aqueous solution containing an acidic material dissolved therein, an aqueous solution containing a basic material dissolved therein, alcohols, glycol ethers, ketones and chlorinated hydrocarbons.
Claim 29
Dependent Claim
33 words
A method as claimed in claim 27 wherein said acidic material is selected from the group consisting of formic acid, acetic acid, propionic acid, lactic acid, hydrochloric acid, phosphoric acid and mixtures thereof.
Claim 30
Dependent Claim
35 words
A method as claimed in claim 27 wherein said basic material is selected from the group consisting of sodium carbonate, sodium hydrogen carbonate, sodium metasilicate, tetraalkyl ammonium hydroxide, sodium hydroxide, potassium hydroxide and mixtures thereof.
Claim 31
Dependent Claim
35 words
A method as claimed in claim 1 wherein said photosensitive coating film is developed and removed under conditions of a temperature of 10° to 70° C. and a developing time of 5 to 600 seconds.
Claim 32
Dependent Claim
110 words
A method as claimed in claim 1 wherein said colored coating is obtained by processing a film-forming component and a colorant component with a material selected from the group consisting of an acidic substance and a basic substance, said film-forming component being selected from the group consisting of cationic resins, anionic resins and photocurable resins, said colorant component being selected from the group consisting of dyes, pigments and mixtures thereof, said acidic substance being selected from the group consisting of formic acid, acetic acid, propionic acid, lactic acid and mixtures thereof, and said basic substance being selected from the group consisting of triethylamine, diethylamine, diethylethanol amine, ammonia and mixtures thereof.
Claim 33
Dependent Claim
76 words
A method as claimed in claim 31 wherein said film-forming component comprises a cationic resin obtained by introducing an onium group into a main resin, said main resin being selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, epoxy resin, urethane resin, polybutadiene resin, polyamide resin and mixtures thereof, and said onium group being selected from the group consisting of an amino group, an ammonium group, a sulfonium group and mixtures thereof.
Claim 34
Dependent Claim
49 words
A method as claimed in claim 31 wherein said film-forming component comprises an anionic resin obtained by introducing a carboxyl group into a main resin selected from the group consisting of acrylic resin, polyester resin, maleinated oil resin, polybutadiene resin, epoxy resin, urethane resin, polyamide resin and mixtures thereof.
Claim 35
Dependent Claim
37 words
A method as claimed in claim 31 wherein said photocurable resins contain a functional group selected from the group consisting of an acryloyl group, a methacryloyl group, a cinnamoyl group and mixtures thereof in a molecule thereof.
Claim 36
Dependent Claim
35 words
A method as claimed in claim 31 wherein said photocurable resins comprise a photopolymerization initiator selected from the group consisting of benzoins, benzoin ethers, benzylalkyl ketals, benzophenone derivatives, anthraquinone derivatives, thioxanthone derivatives and mixtures thereof.
Claim 37
Dependent Claim
27 words
A method as claimed in claim 31 wherein said dyes comprise the group consisting of azo dyes, anthraquinone dyes, benzodifuranone dyes, condensed methine dyes and mixtures thereof.
Claim 38
Dependent Claim
58 words
A method as claimed in claim 31 wherein said pigments comprise the group consisting of azo lake organic pigments, quinacridone organic pigments, phthalocyanine organic pigments, isoindolinone organic pigments, anthraquinone organic pigments, thioindigo organic pigments, chrome yellow, iron oxide, chrome vermilion, chrome green, ultramarine, prussian blue, cobalt blue, cobalt green, emerald green, titanium white, carbon black and mixtures thereof.
Claim 39
Dependent Claim
42 words
A method as claimed in claim 1 wherein said colored coating is electrodeposited at an electrical voltage of 5 to 500 V dc for a time interval of 5 to 300 seconds and at a liquid temperature of 10° to 35° C.
Claim 40
Dependent Claim
26 words
A method as claimed in claim 1 further comprising a step of curing by heating at 100° to 250° C. for 5 minutes to one hour.
Claim 41
Dependent Claim
13 words
A method as claimed in claim 1 further comprising a step of photocuring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |