US4189320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive o-quinone diazide compositions and photographic reproduction processes and structures
Assignee: CNA Holdings LLC
•
Filing: 1977-11-01
•
Granted: 1980-02-19
•
Expires: 1997-11-01
Abstract
Abstract A light-sensitive coating composition and a light-sensitive photomechanical structure, such as a printing plate or a photoresist is produced by coating a suitable planar substrate with a condensation product of an organic isocyanate and a polymeric resin having functional groups reactive with the isocyanate, such as a phenol-formaldehyde resin, and a light-sensitive diazo compound, such as the esters and amides of quinone diazides, the coating being softenable by exposure to light and subsequent treatment with a conventional liquid printing plate developer, such as an aqueous alkaline solution and/or an organic solvent.
Inventors
- 👤 Shane H. Hsieh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:43
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022; G03F7/023; G03F7/0233; G03F7/0236
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
61 words
A positive-working, light-sensitive coating composition comprising at least one solvent-soluble, isocyanate-free, free hydroxy-containing condensation product of an organic isocyanate and a phenol-formaldehyde novolak resin, in admixture with at least one light-sensitive diazo compound selected from the group consisting of esters and amides of o-quinone diazides and mixtures thereof, said composition being soluble in aqueous alkaline developer solution after exposure to light.
Claim 2
Dependent Claim
61 words
A positive-working, light-sensitive coating composition comprising at least one solvent-soluble, isocyanate-free, free hydroxy-containing condensation product of an organic isocyanate and a phenol-formaldehyde novolak resin, in admixture with at least one light-sensitive diazo compound selected from the group consisting of esters and amides of o-quinone diazides and mixtures thereof, said composition being soluble in aqueous alkaline developer solution after exposure to light.
Claim 3
Dependent Claim
17 words
A composition in accordance with claim 1 wherein the printing plate developer is an aqueous alkaline solution.
Claim 4
Dependent Claim
16 words
A composition in accordance with claim 1 wherein the printing plate developer is an organic solvent.
Claim 5
Dependent Claim
23 words
A composition in accordance with claim 1 wherein the developer solution is a mixture of an aqueous alkaline solution and an organic solvent.
Claim 6
Dependent Claim
37 words
A composition in accordance with claim 1 wherein the ratio of isocyanate to novolak resin is within the range of about 0.1 to 60 parts by weight of isocyanate per 100 parts by weight of novolak resin.
Claim 7
Dependent Claim
44 words
A composition in accordance with claim 1 wherein the organic isocyanate is selected from the group consisting of a diisocyanate and polyisocyanate and is present in the range of about 0.1 to 15 parts by weight per 100 parts by weight of novolak resin.
Claim 8
Dependent Claim
14 words
A composition in accordance with claim 1 wherein said organic isocyanate is a mono-isocyanate.
Claim 9
Dependent Claim
37 words
A composition in accordance with claim 7 wherein the ratio of isocyanate to novolak resin is within the range of about 0.1 to 60 parts by weight of isocyanate per 100 parts by weight of novolak resin.
Claim 10
Dependent Claim
37 words
A composition in accordance with claim 8 wherein the ratio of mono-isocyanate to novolak resin is within the range of about 2 to 35 parts by weight of mono-isocyanate per 100 parts by weight of novolak resin.
Claim 11
Dependent Claim
33 words
A composition in accordance with claim 1 wherein said condensation product is present in the range of about 0.1 to 10 parts by weight per part by weight of said light-sensitive diazo compound.
Claim 12
Dependent Claim
15 words
A light-sensitive material comprising a supported positive-working, light-sensitive coating composition as described in claim 1.
Claim 13
Dependent Claim
16 words
A light-sensitive material in accordance with claim 11 in which the organic isocyanate is a mono-isocyanate.
Claim 14
Dependent Claim
14 words
A material in accordance with claim 11 wherein the material is a printing plate.
Claim 15
Dependent Claim
14 words
A material in accordance with claim 9 wherein the support is an aluminum plate.
Claim 16
Dependent Claim
13 words
A material in accordance with claim 11 wherein the material is a photoresist.
Claim 17
Dependent Claim
15 words
A material in accordance with claim 11 wherein the support is an aluminum/copper/chromium trimetal plate.
Claim 18
Dependent Claim
16 words
A material in accordance with claim 11 wherein the support is a copper foil-phenolic resin laminate.
Claim 19
Dependent Claim
14 words
A material in accordance with claim 11 wherein the support is a copper board.
Claim 20
Dependent Claim
41 words
A method which comprises exposing a supported, light-sensitive coating composition as described in claim 1 to light under a pattern and developing the resulting image with an aqueous alkaline solution and/or organic solvent which removes the light-exposed areas of the coating.
References Cited (Backward Citations)
US3106465A
Cited
US3061430A
Cited
US3201239A
Cited
GB975456A
Cited
GB975457A
Cited
US3396019A
Cited
US3208850A
Cited
US3533796A
Cited
US3522049A
Cited
US3551154A
Cited
GB1280885A
Cited
US3655625A
Cited
US3652272A
Cited
US3660097A
Cited
US3732105A
Cited
US3890152A
Cited
US3793033A
Cited
DE2429251A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |