Patent US4581726A successfully refreshed from Google Patents.
US4098655A
Expired / Lapsed
US
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Method for fabricating a photoreceptor
Assignee: Xerox Corp
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Filing: 1977-09-23
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Granted: 1978-07-04
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Expires: 1997-09-23
Abstract
Abstract There is described a method for forming a photoreceptor wherein a substrate having a thin electrically insulating oxide film on a surface thereof is subjected to an electroless deposition step from a selenious acid solution whereby the oxide film is dissolved and a thin selenium layer is formed on the substrate. In one embodiment, a relatively thick photoconductive insulating layer comprising selenium or alloys thereof is deposited by vacuum evaporation over the previously electrolessly deposited selenium layer. In another embodiment, a layer of a charge carrier transport material is deposited over the selenium layer. In a preferred embodiment of the invention, an oxide-free substrate is initially subjected to an electrochemical oxidation step in an alkaline medium to form a thin electrically insulating oxide film on the surface thereof.
Inventors
- 👤 Anthony T. Ward
- 👤 Donald J. Teney
- 👤 James M. Ishler
- 👤 Aleksandar Damjanovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:01
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; G03G5/043; G03G5/0433
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A method for fabricating a photoreceptor comprising (a) providing a substrate comprising a metal which is less positive than selenium in the electrochemical series, said substrate having a thin layer of an oxide of said metal on at least one surface thereof; (b) contacting said metal oxide layer with an aqueous selenious acid solution in the absence of applied electrical potential whereby said metal oxide is dissolved and a thin layer of selenium is formed on said surface of said substrate by electrochemical displacement; and (c) vacuum evaporating a photoconductive layer comprising selenium or its alloys over said thin selenium layer formed in step (b).
Claim 2
Independent Claim
105 words
A method for fabricating a photoreceptor comprising (a) providing a substrate comprising a metal which is less positive than selenium in the electrochemical series, said substrate having a thin layer of an oxide of said metal on at least one surface thereof; (b) contacting said metal oxide layer with an aqueous selenious acid solution in the absence of applied electrical potential whereby said metal oxide is dissolved and a thin layer of selenium is formed on said surface of said substrate by electrochemical displacement; and (c) vacuum evaporating a photoconductive layer comprising selenium or its alloys over said thin selenium layer formed in step (b).
Claim 3
Dependent Claim
24 words
The method as defined in claim 1 wherein said substrate comprises a metal selected from the group consisting of zinc, cadmium, aluminum and nickel.
Claim 4
Dependent Claim
43 words
The method as defined in claim 1 wherein said substrate comprises nickel and is an endless flexible belt and wherein step (a) includes forming a layer of nickel oxide on a surface of the nickel substrate by electrochemical oxidation from an alkaline medium.
Claim 5
Dependent Claim
28 words
The method as defined in claim 1 wherein said layer of selenium formed in step (b) has an average thickness of from about 1000 to about 3000 angstroms.
Claim 6
Independent Claim
110 words
A method for fabricating a photoreceptor comprising (a) providing a substrate comprising a metal which is less positive than selenium in the electrochemical series, said substrate having a thin layer of an oxide of said metal on at least one surface thereof; (b) contacting said metal oxide layer with an aqueous selenious acid solution in the absence of applied electrical potential whereby said metal oxide is dissolved and a thin layer of selenium is formed on said surface of said substrate by electrochemical displacement; and (c) depositing over said thin selenium layer a layer of a charge carrier transport material capable of transporting at least one species of charge carrier.
Claim 7
Independent Claim
110 words
A method for fabricating a photoreceptor comprising (a) providing a substrate comprising a metal which is less positive than selenium in the electrochemical series, said substrate having a thin layer of an oxide of said metal on at least one surface thereof; (b) contacting said metal oxide layer with an aqueous selenious acid solution in the absence of applied electrical potential whereby said metal oxide is dissolved and a thin layer of selenium is formed on said surface of said substrate by electrochemical displacement; and (c) depositing over said thin selenium layer a layer of a charge carrier transport material capable of transporting at least one species of charge carrier.
Claim 8
Dependent Claim
24 words
The method as defined in claim 5 wherein said substrate comprises a metal selected from the group consisting of zinc, cadmium, aluminum and nickel.
Claim 9
Dependent Claim
18 words
The method as defined in claim 5 wherein said charge carrier transport material is an electron transport material.
Claim 10
Dependent Claim
38 words
The method as defined in claim 5 wherein said substrate comprises nickel and is an endless flexible belt and wherein step (a) includes forming a layer of nickel oxide on a surface of said substrate by electrochemical oxidation.
Claim 11
Dependent Claim
28 words
The method as defined in claim 5 wherein said layer of selenium formed in step (b) has an average thickness of from about 1000 to about 3000 angstroms.
Claim 12
Dependent Claim
17 words
The method as defined in claim 5 wherein said selenium layer formed in step (b) is crystalline.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |