US4680244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive recording material for the production of a printing form or printed circuit with photoconductive layer and light-sensitive overlayer
Assignee: Hoechst AG
•
Filing: 1985-03-18
•
Granted: 1987-07-14
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Expires: 2005-03-18
Abstract
Abstract The disclosed light-sensitive recording material is composed of an electrically conductive support, suitable for the production of printing forms or printed circuits, and a photoconductive layer system containing a photoconductor, a binder, a sensitizing dye and conventional additives. The photoconductive system comprises (A) a single photoconductive layer, or multiple layers, applied to the support and (B) a light-sensitive covering layer which contains at least one photochemically reactive compound. The use of the recording material in a process for the production of printing forms and printed circuits is also disclosed.
Inventors
- 👤 Peter Lehmann
- 👤 Manfred Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/20; G03F7/2002; G03F7/2014; G03F7/2016; G03F7/2018; G03G; G03G13/00; G03G13/26; G03G5/00; G03G5/153; H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/061; H05K3/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A light-sensitive recording material comprised of (A) an electrically conductive support which is suitable for the production of printing forms or printed circuits, (B) at least one photoconductive layer having a first and a second surface, said photoconductive layer (i) containing a resin binder which is soluble in an aqueous alkaline or alcoholic alkaline solvent and (ii) being applied along said first surface to said support, and (C) a light-sensitive covering layer applied to said second surface of said photoconductive layer, said covering layer comprising a photochemically reactive composition which contains at least one compound having a solubility in an aqueous alkaline or alcoholic alkaline solvent which is increased by actinic radiation, whereby said solvent is capable of decoating actinic radiationexposed portions of said covering layer and portions of said photoconductive layer located beneath the portions of said covering layer.
Claim 2
Dependent Claim
140 words
A light-sensitive recording material comprised of (A) an electrically conductive support which is suitable for the production of printing forms or printed circuits, (B) at least one photoconductive layer having a first and a second surface, said photoconductive layer (i) containing a resin binder which is soluble in an aqueous alkaline or alcoholic alkaline solvent and (ii) being applied along said first surface to said support, and (C) a light-sensitive covering layer applied to said second surface of said photoconductive layer, said covering layer comprising a photochemically reactive composition which contains at least one compound having a solubility in an aqueous alkaline or alcoholic alkaline solvent which is increased by actinic radiation, whereby said solvent is capable of decoating actinic radiationexposed portions of said covering layer and portions of said photoconductive layer located beneath the portions of said covering layer.
Claim 3
Dependent Claim
19 words
A recording material as claimed in claim 1, wherein said photochemically reactive composition comprises at least one o-quinonediazide compound.
Claim 4
Dependent Claim
16 words
A recording material as claimed in claim 1, wherein said solvent system comprises a wetting agent.
Claim 5
Dependent Claim
25 words
A recording material as claimed in claim 1, wherein said covering layer has a thickness within the range from about 0.1 to about 50 μm.
Claim 6
Dependent Claim
25 words
A recording material as claimed in claim 4, wherein said covering layer has a thickness within the range from about 1 to about 25 μm.
Claim 7
Dependent Claim
25 words
A recording material as claimed in claim 1, wherein said photoconductive layer has a thickness within the range from about 2 to about 10 μm.
Claim 8
Dependent Claim
17 words
A recording material as claimed in claim 1, wherein said covering layer further comprises a coloring agent.
Claim 9
Dependent Claim
39 words
A recording material as claimed in claim 1, wherein said electrically conductive support is comprised of material selected from the group consisting of aluminum, zinc, magnesium, chromium, copper, metallized cellulose compound, and paper rendered superficially hydrophilic and electrically conductive.
References Cited (Backward Citations)
US2367670A
Cited
US2367661A
Cited
US2367660A
Cited
US2448828A
Cited
US2722512A
Cited
GB765909A
Cited
US2848328A
Cited
GB790131A
Cited
GB851218A
Cited
US3189447A
Cited
US3112197A
Cited
US2939787A
Cited
US2951758A
Cited
US3046127A
Cited
US3257203A
Cited
GB944126A
Cited
US3218167A
Cited
US3215529A
Cited
US3244517A
Cited
US3287123A
Cited
US3313626A
Cited
GB996315A
Cited
GB1230447A
Cited
US3549367A
Cited
GB1274296A
Cited
GB1312925A
Cited
US3751259A
Cited
US3732106A
Cited
US3884693A
Cited
US3930865A
Cited
US4108657A
Cited
US4063948A
Cited
US4186017A
Cited
US4296190A
Cited
GB2014748A
Cited
US4388391A
Cited
US4387151A
Cited
US4421844A
Cited
US4442191A
Cited
US4435491A
Cited
EP0053362A2
Cited
US4472491A
Cited
US4506006A
Cited
US4500617A
Cited
GB2121201A
Cited
US4518668A
Cited
US4521503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |