US4477552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of diazo-resin sensitizers with polyvinyl pyridine
Assignee: Valeo SE
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Filing: 1982-10-28
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Granted: 1984-10-16
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Expires: 2002-10-28
Abstract
Abstract Light-sensitive compositions and materials incorporating such compositions, such as coated films for the production of polymeric resists, comprise a diazo-resin as a sensitizer for the composition and a water-soluble or water-dispersible colloid. In order to stabilize the diazo-resin sensitizer and increase the time between manufacture and use of such light-sensitive compositions and material, a poly-(vinylpyridine) is incorporated in the composition, preferably in the form of a water-soluble salt such as the hydrochloride or sulphate.
Inventors
- 👤 Peter M. G. Day
- 👤 John W. Jones
- 👤 John A. Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:30
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021; G03F7/0212
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
In a light-sensitive film-forming composition comprising in admixture an aqueous dispersion of a water-soluble or water-dispersible colloid selected from the group consisting of polyvinyl alcohol, gelatin, casein, hydroxyethylcellulose, polyacrylamide, polyvinylpyrrolidone, poly(vinyl-acetate), and copolymer of vinyl-acetate with ethylene present in a film-forming amount, and a water-soluble light-sensitive diazo-resin condensation product of an aromatic diazonium compound and a compound containing an active carbonyl group, present in an amount effective to decrease the solubility of the film upon exposure to light; the improvement in which the composition contains, as a stabilizer for the diazo-resin condensation product, a linear polymer of vinyl-pyridine in an amount effective to delay deterioration of said product in the presence of water.
Claim 2
Dependent Claim
113 words
In a light-sensitive film-forming composition comprising in admixture an aqueous dispersion of a water-soluble or water-dispersible colloid selected from the group consisting of polyvinyl alcohol, gelatin, casein, hydroxyethylcellulose, polyacrylamide, polyvinylpyrrolidone, poly(vinyl-acetate), and copolymer of vinyl-acetate with ethylene present in a film-forming amount, and a water-soluble light-sensitive diazo-resin condensation product of an aromatic diazonium compound and a compound containing an active carbonyl group, present in an amount effective to decrease the solubility of the film upon exposure to light; the improvement in which the composition contains, as a stabilizer for the diazo-resin condensation product, a linear polymer of vinyl-pyridine in an amount effective to delay deterioration of said product in the presence of water.
Claim 3
Dependent Claim
24 words
A composition according to claim 1, wherein the stabilizer is a linear poly-(vinylpyridine) having a molecular weight in the range from 2,000 to 200,000.
Claim 4
Dependent Claim
27 words
A composition according to claim 1, wherein the poly-(vinylpyridine) is present in an amount which is at least equal in weight to the amount of diazo-resin present.
Claim 5
Dependent Claim
27 words
A composition according to claim 3, wherein the poly-(vinylpyridine) is present in an amount in the range from 100% to 300% by weight of the diazo-resin present.
Claim 6
Dependent Claim
21 words
A composition according to claim 1, wherein the poly-(vinylpyridine) is present in the form of a soluble salt of an acid.
Claim 7
Dependent Claim
18 words
A composition according to claim 2, wherein said molecular weight is in the range from 2,000 to 20,000.
Claim 8
Dependent Claim
129 words
In a material for use in the production of a polymeric resist, which comprises a supporting substrate carrying a coating of a light-sensitive composition comprising in admixture a water-soluble or water-dispersible colloid selected from the group consisting of polyvinyl alcohol, gelatin, casein, hydroxyethylcellulose, polyacrylamide, polyvinylpyrrolidone, poly(vinyl-acetate), and copolymers of vinyl-acetate with ethylene present in a film-forming amount, and a water-soluble light-sensitive diazo-resin, the diazo-resin comprising the condensation product of an aromatic diazonium compound and a compound containing an active carbonyl compound, present in an amount effective to decrease the solubility of the film upon exposure to light; the improvement in which the coating also contains, as a stabilizer for the diazo-resin, a linear poly-(vinylpyridine) in an amount effective to delay deterioration of said product in the presence of water.
Claim 9
Dependent Claim
129 words
In a material for use in the production of a polymeric resist, which comprises a supporting substrate carrying a coating of a light-sensitive composition comprising in admixture a water-soluble or water-dispersible colloid selected from the group consisting of polyvinyl alcohol, gelatin, casein, hydroxyethylcellulose, polyacrylamide, polyvinylpyrrolidone, poly(vinyl-acetate), and copolymers of vinyl-acetate with ethylene present in a film-forming amount, and a water-soluble light-sensitive diazo-resin, the diazo-resin comprising the condensation product of an aromatic diazonium compound and a compound containing an active carbonyl compound, present in an amount effective to decrease the solubility of the film upon exposure to light; the improvement in which the coating also contains, as a stabilizer for the diazo-resin, a linear poly-(vinylpyridine) in an amount effective to delay deterioration of said product in the presence of water.
Claim 10
Dependent Claim
24 words
A material according to claim 7, wherein the stabilizer is a linear poly-(vinylpyridine) having a molecular weight in the range from 2,000 to 200,000.
Claim 11
Dependent Claim
27 words
A material according to claim 7, wherein the poly-(vinylpyridine) is present in an amount which is at least equal in weight to the amount of diazo-resin present.
Claim 12
Dependent Claim
27 words
A material according to claim 9, wherein the poly-(vinylpyridine) is present in an amount in the range from 100% to 300% by weight of the diazo-resin present.
Claim 13
Dependent Claim
21 words
A material according to claim 7, wherein the poly-(vinylpyridine) is present in the form of a soluble salt of an acid.
Claim 14
Dependent Claim
18 words
A material according to claim 8, wherein said molecular weight is in the range from 2,000 to 20,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |