Patent US4419425A successfully refreshed from Google Patents.
US4419425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing color filter
Assignee: Panasonic Holdings Corp
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Filing: 1982-05-20
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Granted: 1983-12-06
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Expires: 2002-05-20
Abstract
Abstract Proposed is a method for manufacturing a color filter having the steps of: forming a stripe- or lattice-shaped light-shield pattern on one major surface of a transparent glass substrate; forming a photosensitive base film on the same major surface of the glass substrate on which the light-shield pattern is formed; exposing the photosensitive base film by light radiated from the other major surface of the glass substrate, using the light-shield pattern as a mask, developing the base film to remove a nonexposed portion of the photosensitive base film immediately above the light-shield pattern and to divide the photosensitive base film along the light-shield pattern; and selectively dyeing divided base film portions to form color layers.
Inventors
- 👤 Kazufumi Ogawa
- 👤 Isamu Kitahiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:18
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/30; H10F77/306; H10F77/331; G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; G03F7/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
181 words
A method for manufacturing a color filter comprising: (a) forming a stripe -or lattice- shaped light-shield film on one major surface of a transparent glass substrate; (b) forming a photosensitive resin film to be dyed on said one major surface of said glass substrate on which said light-shield film is formed; (c) exposing said resin film by radiating light from the other major surface of said glass substrate, using said light-shield film as a mask, and developing said resin film, thereby removing a nonexposed portion of said resin film on said light shield film; and (d) forming a photoresist film over said light-shield film and said resin film; (e) exposing said photoresist film through a mask having a predetermined pattern thereon; (f) developing said exposed photoresist film to selectively form an opening therein which corresponds to a portion of said resin film be dyed, a residual portion of said photoresist film being provided as an antidye mask; (g) dying the portion of the resin film which is uncovered in the opening of the photoresist film; and (h) removing said photoresist film.
Claim 2
Independent Claim
181 words
A method for manufacturing a color filter comprising: (a) forming a stripe -or lattice- shaped light-shield film on one major surface of a transparent glass substrate; (b) forming a photosensitive resin film to be dyed on said one major surface of said glass substrate on which said light-shield film is formed; (c) exposing said resin film by radiating light from the other major surface of said glass substrate, using said light-shield film as a mask, and developing said resin film, thereby removing a nonexposed portion of said resin film on said light shield film; and (d) forming a photoresist film over said light-shield film and said resin film; (e) exposing said photoresist film through a mask having a predetermined pattern thereon; (f) developing said exposed photoresist film to selectively form an opening therein which corresponds to a portion of said resin film be dyed, a residual portion of said photoresist film being provided as an antidye mask; (g) dying the portion of the resin film which is uncovered in the opening of the photoresist film; and (h) removing said photoresist film.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein steps (d), (e), (f), (g) and (h) are repeated a plurality of times.
Claim 4
Dependent Claim
14 words
A method according to claim 1 wherein said unexposed resin film is water soluble.
Claim 5
Dependent Claim
14 words
A method according to claim 1, wherein said light-shield film comprises a metal film.
References Cited (Backward Citations)
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |