US3671819A
Expired / Lapsed
US
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Metal-insulator structures and method for forming
Assignee: Westinghouse Electric Corp
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Filing: 1971-01-26
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Granted: 1972-06-20
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Expires: 1991-01-26
Abstract
Abstract Metal-insulator structures and methods for forming such structures wherein a substrate comprising a metallic material, which in the presence of an electrolyte under anodic conditions forms a porous oxide coating, such as aluminum, is completely anodized at selected areas to form insulating areas through the substrate. Also backing layers and masking layers comprising a material which forms a passivating coating in the presence of the electrolyte under anodic conditions, such as titanium, may be deposited on the substrate for controlling the anodization process.
Inventors
- 👤 John G Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:34
CPC Classifications
H; H10; H10N; H10N97/00; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/10; Y; Y10; Y10S; Y10S148/00; Y10S148/106
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
10 words
The structure of claim 1 wherein: said oxide is porous.
Claim 2
Dependent Claim
10 words
The structure of claim 1 wherein: said metal comprises aluminum.
Claim 3
Dependent Claim
42 words
The structure of claim 1 includes: photo-responsive means associated with predetermined of said areas of material on one surface of said substrate responsive to light input thereto for instigating the emission of electrons for outputting from the opposite surface of said substrate.
Claim 4
Independent Claim
107 words
A method of fabricating a metal-insulator substrate for use in electronic devices comprising the steps of: masking a plurality of separate areas of an anodizable metal sheet, said masked areas being spaced apart at least by distance of 0.6 the thickness of said sheet, and having a distance at least 0.6 the thickness of said sheet while leaving the remaining areas of said sheet exposed, exposing said masked sheet to anodizing electrolyte, applying a potential between said sheet and electrolyte for anodizing the exposed areas of said sheet completely from one surface thereof to the other whereby said masked areas of metal are separated by insulating areas.
Claim 5
Dependent Claim
14 words
The method of claim 5 wherein: said insulating areas formed are a porous oxide.
Claim 6
Dependent Claim
10 words
The method of claim 5 wherein: said metal comprises aluminum.
Claim 7
Dependent Claim
44 words
The method of claim 5 includes the step of: depositing a backing layer on said substrate, said backing layer comprises a material which forms a passivating coating in the presence of an electrolyte under said anodizing conditions to ensure homogeneity of said insulating areas.
Claim 8
Dependent Claim
23 words
The method of claim 8 wherein: said backing layer material is selected from a group consisting of titanium, tantalum, niobium, zirconium and chromium.
Claim 9
Dependent Claim
11 words
The method of claim 9 wherein: said backing material comprises titanium.
Claim 10
Dependent Claim
10 words
The method of claim 10 wherein said metal comprises aluminum.
Claim 11
Dependent Claim
23 words
The method of claim 8 includes the step of: stripping said backing layer from said substrate by depositing it in an etching solution.
Claim 12
Dependent Claim
28 words
The method of claim 5 wherein: said masking comprises applying a masking material which forms a passivating coating in the presence of an electrolyte under said anodizing conditions.
Claim 13
Dependent Claim
22 words
The method of claim 13 wherein: said masking material is selected from a group consisting of titanium, tantalum, niobium, zirconium and chromium.
Claim 14
Dependent Claim
11 words
The method of claim 13 wherein: said masking material comprises titanium.
Claim 15
Dependent Claim
10 words
The method of claim 15 wherein: said 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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |