US5186801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of color filter
Assignee: Sharp Corp
•
Filing: 1991-08-23
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Granted: 1993-02-16
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Expires: 2011-08-23
Abstract
Abstract The present invention provides an improved process for forming a color filter for a color display. The process comprises: (a) forming a transparent electroconductive layer on a substrate, (b) forming a negative type photosensitive resin layer having a desired color by electrodeposition on the transparent electroconductive layer, (c) exposing the photosensitive resin layer to light through a negative mask having a desired pattern followed by developing to form a patterned color layer, and (d) effecting the steps (b) and (c) necessary times to form patterned layers having required colors.
Inventors
- 👤 Akira Matsumura
- 👤 Masashi Ohata
- 👤 Katsukiyo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:06
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133516; G03F7/0035; G03F7/16; G03F7/164
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A process for preparing a color filter comprising: (a) forming a transparent electroconductive layer on a substrate, (b) forming a negative type photosensitive resin layer having a desired color by electrodeposition directly on the transparent electroconductive layer, (c) exposing the photosensitive resin layer to light through a negative mask having a desired pattern followed by developing to form a patterned color layer, and (e) effecting the steps (b) and (c) necessary times to form patterned layers having required colors.
Claim 2
Dependent Claim
79 words
A process for preparing a color filter comprising: (a) forming a transparent electroconductive layer on a substrate, (b) forming a negative type photosensitive resin layer having a desired color by electrodeposition directly on the transparent electroconductive layer, (c) exposing the photosensitive resin layer to light through a negative mask having a desired pattern followed by developing to form a patterned color layer, and (e) effecting the steps (b) and (c) necessary times to form patterned layers having required colors.
Claim 3
Dependent Claim
13 words
The process according to claim 1 wherein said substrate is glass or plastic.
Claim 4
Dependent Claim
15 words
The process according to claim 1 wherein said transparent electroconductive layer is indium tin oxide.
Claim 5
Dependent Claim
27 words
The process according to claim 1 wherein said negative photosensitive layer is formed by electrodepositing in an electrodeposition bath with passing electric current through the electroconductive layer.
Claim 6
Dependent Claim
69 words
The process according to claim 4 wherein said electrodeposition bath contains (i) a negative type photosensitive resin as a film-forming component which becomes water depositable by neutralizing with acid or alkali, (ii) a dyestuff which gives color to the electrodeposited film, (iii) an organic solvent which controls electrodeposition properties and bath stability, (iv) an alkaline or acidic material which makes the photosensitive resin electrodepositable and (v) a photopolymerization initiator.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-02-16 | 1996-08-17 | 1997-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-16 | 2000-08-17 | 2001-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-16 | 2004-08-17 | 2005-02-16 | $7700.00 | Window Closed / Lapsed |