Patent US4387156A successfully refreshed from Google Patents.
US4387156A
Expired / Lapsed
US
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Imageable film containing a metal oxide opacifying layer
Assignee: 3M Co
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Filing: 1981-02-04
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Granted: 1983-06-07
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Expires: 2001-02-04
Abstract
Abstract Imaging materials are disclosed which comprise a substrate having a metal/ (metal oxide or sulfide) coating with an optical density of at least 0.2 on one surface of the substrate and a photoresist layer over said coating.
Inventors
- 👤 George H. Crawford
- 👤 Richard S. Fisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:14
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
An imageable article comprising (a) a substrate, (b) on at least one surface of said substrate a first opacifying layer comprising a dispersion of (i) metal and (ii) metal oxide with an optical density of at least 0.2 derived from the dispersion, and (c) a photoresist layer on said first layer, wherein said opacifying layer is at least 15 Angstroms in thickness and comprises a mixture of (a) metal and (b) metal oxide, said opacifying layer characterized by having a region of higher concentration of metal on one surface than on a second surface, and having said one surface of the said opacifying layer bonded to said substrate, having said second surface facing away from said substrate, and having a zone of continuous transition of the concentration of metal from said region of higher concentration of metal to said second surface.
Claim 2
Dependent Claim
141 words
An imageable article comprising (a) a substrate, (b) on at least one surface of said substrate a first opacifying layer comprising a dispersion of (i) metal and (ii) metal oxide with an optical density of at least 0.2 derived from the dispersion, and (c) a photoresist layer on said first layer, wherein said opacifying layer is at least 15 Angstroms in thickness and comprises a mixture of (a) metal and (b) metal oxide, said opacifying layer characterized by having a region of higher concentration of metal on one surface than on a second surface, and having said one surface of the said opacifying layer bonded to said substrate, having said second surface facing away from said substrate, and having a zone of continuous transition of the concentration of metal from said region of higher concentration of metal to said second surface.
Claim 3
Dependent Claim
19 words
The imageable article of claim 1, wherein the same metal comprises said (i) metal and said (ii) metal oxide.
Claim 4
Dependent Claim
17 words
The imageable article of claim 1 wherein said photoresist is a negative acting polyethylenically unsaturated photosensitive composition.
Claim 5
Dependent Claim
15 words
The imageable article of claim 1 wherein said photoresist comprises a positive acting photoresist composition.
Claim 6
Dependent Claim
28 words
The imageable article of claim 4 wherein said metal is selected from the group consisting of aluminum, tin, zinc, chromium, titanium, magnesium, manganese, nickel, iron, and mixtures thereof.
Claim 7
Dependent Claim
50 words
The article of claim 1 wherein said photosensitive resist layer is selected from the group consisting of: (a) positive acting photoresists comprising a polymeric binding and a positive acting diazonium salt or resin, and (b) negative acting photoresists comprising a composition capable of photopolymerizing in an imagewise fashion when irradiated.
Claim 8
Dependent Claim
28 words
The article of claim 6 wherein said photosensitive resist layer is a positive acting photoresist comprising a positive acting diazonium salt or resin in an epoxy polymeric binder.
Claim 9
Dependent Claim
41 words
The article of claim 1, 6 or 7 wherein the same metal comprises said metal and said metal oxide and said metal is selected from the group consisting of aluminum, tin, zinc, chromium, titanium, magnesium, manganese, nickel, iron and mixtures thereof.
Claim 10
Dependent Claim
24 words
The article of claim 1, 6 or 7 wherein the same metal comprises said metal and said metal oxide and that metal comprises aluminum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |