US3775114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive silver halide layers and process
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1970-06-12
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Granted: 1973-11-27
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Expires: 1990-06-12
Abstract
Abstract This disclosure concerns a process of producing photographic images by photoexposing a photosensitive silver halide layer of less than two microns thickness and subsequently physically developing the exposed layer to obtain a visible image. The preferred silver halide layers are of a thickness of less than one micron. The resulting photo-images are characterized by extremely high resolution, especially resolution required for holographic imaging and reproduction. Additionally, the images are adherently bonded to the film substrate.
Inventors
- 👤 R Gracia
- 👤 R Laughrey
- 👤 P Tuohey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:57
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; H; H05; H05K; H05K3/00; H05K3/10; H05K3/105; H05K3/106; H05K3/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
23 words
Medium as in claim 1 wherein the layer thickness is less than about one micron and wherein the emulsion is an aqueous emulsion.
Claim 2
Dependent Claim
32 words
Medium as in claim 1 wherein the layer thickness is less than about 0.5 micron and wherein the layer was applied to the substrate by roller coating the aqueous silver halide emulsion.
Claim 3
Dependent Claim
34 words
Medium as in claim 1 wherein the amount of silver as silver halide is about 0.03 g/m2 and wherein the weight ratio of silver halide to binder is from about 1/3 to about 3/1.
Claim 4
Dependent Claim
14 words
Medium as in claim 1 1wherein the substrate is a grained, anodized aluminum substrate.
Claim 5
Dependent Claim
35 words
Medium as in claim 3 wherein the substrate is a brush grained, anodized aluminum substrate suitable for use for preparing a printing plate by exposure and contact with a stabilized, silver ion, ferrous/ferric physical developer.
Claim 6
Dependent Claim
19 words
Medium as in claim 6 wherein the silver halide has a particle size of less than about 0.5 micron.
Claim 7
Dependent Claim
17 words
Medium as in claim 1 wherein the silver halide is silver chloride having an excess chloride content.
Claim 8
Dependent Claim
26 words
Medium as in claim 2 wherein the amount of silver halide present on the substrate based on weight of silver is less than about 0.5 g/m2.
Claim 9
Dependent Claim
21 words
Medium as in claim 3 wherein the particle size of the silver halide is from about 50 to about 200 A.
Claim 10
Dependent Claim
54 words
In a photosensitive silver halide medium, the improvement wherein the photosensitive layer comprises silver halide and a binder, said layer being less than 1 micron in thickness deposited directly on a metal substrate, said layer having been deposited on said substrate by coating said substrate with an emulsion comprising silver halide and a binder.
Claim 11
Dependent Claim
18 words
Medium as in claim 11 wherein the thickness of the photosensitive layer is less than about 0.5 micron.
Claim 12
Dependent Claim
17 words
Medium as in claim 11 wherein the silver halide particle size is less than about 500 A.
Claim 13
Dependent Claim
99 words
Process of forming a metal image adherently bonded to a metal substrate comprising (1) mixing silver halide and a binder to form a photosensitive emulsion, (2) coating this emulsion directly on a metal substrate in an amount such that the dry thickness of the resulting photosensitive layer will be less than about 2 microns, (3) drying said emulsion, (4) imagewise exposing the coated substrate, and (5) contacting the support with a physical developer comprising a solution of metal ions and a reducing agent for these metal ions to selectively deposit the metal in exposed portions of the photosensitive layer.
Claim 14
Dependent Claim
13 words
Process as in claim 14 wherein the substrate is a grained, metal substrate.
Claim 15
Dependent Claim
10 words
Process as in claim 15 wherein the metal is aluminum.
Claim 16
Dependent Claim
14 words
Process as in claim 16 wherein the substrate is a brush grained, anodized substrate.
Claim 17
Dependent Claim
33 words
Process as in claim 15 wherein the step of contacting with the physical developer is prolonged for a time period sufficient to form a metal image suitable for use as a printing plate.
Claim 18
Dependent Claim
18 words
Process as in claim 18 wherein the thickness of the photosensitive layer is less than about 0.5 micron.
Claim 19
Dependent Claim
99 words
Process for making a printing plate comprising (1) preparing an aqueous photosensitive emulsion comprising mixing silver halide and a binder, (2) coating said emulsion directly on a grained metal support, (3) drying the coating to form a photosensitive layer having a thickness of less than about 1 micron, (4) exposing the coated support to an image pattern of activating radiation, and (5) contacting the medium with a stabilized physical developer comprising a solution of metal ions, a reducing agent for said metal ions and an ionic surfactant such that metal is deposited in exposed portions of the coated substrate.
Claim 20
Dependent Claim
25 words
Process as in claim 20 wherein the thickness of the emulsion is less than about 0.5 micron and wherein the metal support is anodized aluminum.
Claim 21
Dependent Claim
19 words
Process as in claim 21 wherein the silver halide has a particle size of less than about 500 A.
Claim 22
Dependent Claim
28 words
Process as in claim 22 wherein the silver halide is silver chloride having an excess of chloride ions present and wherein the binder comprises polyvinyl alcohol or gelatin.
Claim 23
Dependent Claim
25 words
Process as in claim 20 wherein the silver halide is present in an amount of about 0.03 g/m2 based upon the weight of silver present.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |