Patent US4833055A successfully refreshed from Google Patents.
US4833055A
Expired / Lapsed
US
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Electrophotographic photoreceptor comprising amorphous silicon and amorphous carbon buffer layer
Assignee: Fuji Electric Co Ltd
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Filing: 1987-06-04
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Granted: 1989-05-23
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Expires: 2007-06-04
Abstract
Abstract An electrophotographic photoreceptor comprises a conductive base, a photoconductive layer formed of amophous silicon on the conductive base, a buffer layer on the photoconductive layer, and a surface layer covering the photoconductive layer through the buffer layer, wherein the buffer layer is formed of amorphous carbon.
Inventors
- 👤 Toyoki Kazama
- 👤 Koichi Aizawa
- 👤 Kenichi Hara
- 👤 Toshiyuki Iijima
- 👤 Yukio Takano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:27
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08285; G03G5/08214; G03G5/08221
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
50 words
An electrophotographic photoreceptor, comprising: a conductive base; a photoconductive layer formed of amorphous silicon over said conductive base; a buffer layer on said photoconductive layer; and a surface layer on said buffer layer covering said photoconductive layer over said buffer layer wherein said buffer layer consists essentially of amorphous carbon.
Claim 2
Dependent Claim
50 words
An electrophotographic photoreceptor, comprising: a conductive base; a photoconductive layer formed of amorphous silicon over said conductive base; a buffer layer on said photoconductive layer; and a surface layer on said buffer layer covering said photoconductive layer over said buffer layer wherein said buffer layer consists essentially of amorphous carbon.
Claim 3
Dependent Claim
15 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said surface layer includes amorphous carbon.
Claim 4
Dependent Claim
21 words
An electrophotographic photoreceptor as claimed in claim 1, further comprising a blocking layer between said conductive base and said photoconductive layer.
Claim 5
Independent Claim
63 words
A method of manufacturing an electrophotographic photoreceptor, comprising the steps of: forming a photoconductive layer of amorphous silicon photoconductive layer over a conductive base; subjecting the photoconductive layer to a material gas for forming an amorphous carbon buffer layer; and subjecting the buffer layer to a gas having the same material as the buffer layer forming a surface layer on said buffer layer.
Claim 6
Independent Claim
63 words
A method of manufacturing an electrophotographic photoreceptor, comprising the steps of: forming a photoconductive layer of amorphous silicon photoconductive layer over a conductive base; subjecting the photoconductive layer to a material gas for forming an amorphous carbon buffer layer; and subjecting the buffer layer to a gas having the same material as the buffer layer forming a surface layer on said buffer layer.
Claim 7
Dependent Claim
22 words
A method according to claim 4 including the step of forming a blocking layer between said conductive base and said photoconductive layer.
Claim 8
Dependent Claim
50 words
A method according to claim 4 wherein said material gas is a mixture of gas selected from the group consisting of C 2 H 2 , CH 4 , C 2 H 6 , C 3 H 8 , C 2 H 2 with one of hydrogen or oxygen gas.
References Cited (Backward Citations)
US4675265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |