US4409115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Etching solution for etching of photopolymeric films
Assignee: EIDP Inc
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Filing: 1982-09-20
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Granted: 1983-10-11
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Expires: 2002-09-20
Abstract
Abstract Etching solution for dot etching photopolymerized materials which comprises an organic polymeric binder having alkali soluble groups, monomer and photoinitiator, the material having an optical density in the actinic region of at least 1.0, wherein a water-soluble salt of a water-insoluble polymeric polycarboxylic acid whose acid strength is the same or less than that of the binder is present as the etching agent.
Inventors
- 👤 Manfred A. J. Sondergeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:01
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/40; G03F5/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
An etching solution for dot etching photopolymerized materials which comprise an organic polymeric binder having alkali soluble groups, a polymer of an ethylenically unsaturated monomeric compound, and a photoinitiator or photoinitiator system, the photopolymerized material having an optical density in the actinic region of the spectrum of at least 1.0, the improvement wherein the etching solution contains as the etching agent a water-soluble salt of a water-insoluble polymeric polycarboxylic acid whose acid strength is the same or less than that of the organic polymeric binder present in the photopolymerized material.
Claim 2
Dependent Claim
90 words
An etching solution for dot etching photopolymerized materials which comprise an organic polymeric binder having alkali soluble groups, a polymer of an ethylenically unsaturated monomeric compound, and a photoinitiator or photoinitiator system, the photopolymerized material having an optical density in the actinic region of the spectrum of at least 1.0, the improvement wherein the etching solution contains as the etching agent a water-soluble salt of a water-insoluble polymeric polycarboxylic acid whose acid strength is the same or less than that of the organic polymeric binder present in the photopolymerized material.
Claim 3
Dependent Claim
32 words
Etching solution according to claim 1 wherein the etching solution additionally contains up to a 30% excess by weight of free alkali than corresponds to the acid of the organic polymeric binder.
Claim 4
Dependent Claim
31 words
Etching solution according to claim 1 or claim 2 wherein the etching solution contains as the etching agent an alkali salt of the organic polymeric binder present in the photopolymerized material.
Claim 5
Dependent Claim
35 words
Etching solution according to claim 3 wherein the etching solution contains as the etching agent an alkali salt of a 1:1 copolymer comprising styrene and maleic acid anhydride, which is partially esterified with secondary butanol.
References Cited (Backward Citations)
US4173673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |