US4355087A
Expired / Lapsed
US
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Color imaging device having a color filter array using a metal salt of a long-chain fatty acid as a barrier
Assignee: Eastman Kodak Co
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Filing: 1981-09-04
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Granted: 1982-10-19
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Expires: 2001-09-04
Abstract
Abstract A color imaging device having a certain color filter array is disclosed. The color filter array is of the "wash-off" type wherein the individual filter elements are formed by dyeing tiny elements of a dyeable composition. In order to form a barrier so that the process of dyeing subsequent filter elements does not affect a previous set of filter elements, the first set of filter elements is treated with a metal salt of a long-chain fatty acid. The dyeable composition comprises at least one compound having coordination sites for the metal of the long-chain fatty acid salt.
Inventors
- 👤 Thomas W. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:18
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
97 words
A color imaging device comprising a support having a radiation-sensitive surface having superimposed thereon a color filter array having at least two sets of filter elements wherein at least one of said filter elements comprises a dyed element of a dyeable composition wherein: said dyeable composition comprises at least one compound having coordination sites for metal ions and the outermost surface of the elements of at least one set of filter elements comprises a metal salt of a long-chain fatty acid wherein the metal of the salt is coordinated to said coordination sites in said dyeable composition.
Claim 2
Dependent Claim
97 words
A color imaging device comprising a support having a radiation-sensitive surface having superimposed thereon a color filter array having at least two sets of filter elements wherein at least one of said filter elements comprises a dyed element of a dyeable composition wherein: said dyeable composition comprises at least one compound having coordination sites for metal ions and the outermost surface of the elements of at least one set of filter elements comprises a metal salt of a long-chain fatty acid wherein the metal of the salt is coordinated to said coordination sites in said dyeable composition.
Claim 3
Dependent Claim
17 words
A color imaging device according to claim 1 wherein said dyeable composition comprises a dichromated hydrophilic colloid.
Claim 4
Dependent Claim
14 words
A color imaging device according to claim 2 wherein said hydrophilic colloid is gelatin.
Claim 5
Dependent Claim
17 words
A color imaging device according to claim 3 wherein said gelatin is dyed with a reactive dye.
Claim 6
Dependent Claim
22 words
A color imaging device according to claim 1 wherein the metal of said metal salt of a long-chain fatty acid is chromium.
Claim 7
Dependent Claim
33 words
A color imaging device according to claim 1 wherein the long-chain fatty acid of said metal salt of a long-chain fatty acid is selected from the group consisting of myristic and stearic acid.
Claim 8
Dependent Claim
20 words
A color imaging device according to claim 1 wherein said support having a radiation-sensitive surface is a solid-state imaging device.
Claim 9
Independent Claim
142 words
A method of producing a color imaging device comprising a support having a radiation-sensitive surface having superimposed thereon a color filter array having at least two sets of filter elements wherein at least one of said filter elements comprises a dyed element of a dyeable composition, said method comprising the steps of: (a) forming on said surface a layer of a radiation-sensitive dyeable composition which comprises at least one compound having coordination sites for metal ions; (b) exposing and developing said radiation-sensitive dyeable composition in order to form elements of the composition corresponding to a set of filter elements; (c) dyeing said elements to form dyed filter elements; and (d) contacting the surface of the dyed filter elements with a metal salt of a long-chain fatty acid; and forming a second set of filter elements by repeating steps (a), (b) and (c).
Claim 10
Independent Claim
142 words
A method of producing a color imaging device comprising a support having a radiation-sensitive surface having superimposed thereon a color filter array having at least two sets of filter elements wherein at least one of said filter elements comprises a dyed element of a dyeable composition, said method comprising the steps of: (a) forming on said surface a layer of a radiation-sensitive dyeable composition which comprises at least one compound having coordination sites for metal ions; (b) exposing and developing said radiation-sensitive dyeable composition in order to form elements of the composition corresponding to a set of filter elements; (c) dyeing said elements to form dyed filter elements; and (d) contacting the surface of the dyed filter elements with a metal salt of a long-chain fatty acid; and forming a second set of filter elements by repeating steps (a), (b) and (c).
Claim 11
Dependent Claim
73 words
The method of producing a color imaging device according to claim 8 wherein a three-color filter array is produced by performing steps (a) through (d) to form a first set of filter elements of a first color, repeating steps (a) through (d) to form a second set of filter elements of a second color, and then repeating steps (a) through (c) to produce a third set of filter elements of a third color.
Claim 12
Independent Claim
29 words
The method of either of claims 8 or 9 wherein step (c) is performed at least once by immersing the elements in a water solution of a reactive dye.
Claim 13
Independent Claim
33 words
The method of either of claims 8 or 9 wherein step (d) is performed by immersing the dyed filter elements in a water solution comprising said metal salt of a long-chain fatty acid.
Claim 14
Independent Claim
19 words
The method of either of claims 8 or 9 wherein said radiation-sensitive dyeable composition comprises a dichromated hydrophilic colloid.
Claim 15
Independent Claim
23 words
The method of either of claims 8 or 9 wherein the metal of said metal salt of a long-chain fatty acid is chromium.
Claim 16
Independent Claim
21 words
The method of either of claims 8 or 9 wherein said support having a radiation-sensitive surface is a solid-state imaging device.
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |