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Patent US4489149A successfully refreshed from Google Patents.
US4489149A
Expired / Lapsed
US
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Electrophotographic amorphous silicon member
Assignee: Kyocera Corp
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Filing: 1983-12-19
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Granted: 1984-12-18
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Expires: 2003-12-19
Abstract
Abstract The invention disclosed relates to an electrophotographic sensitive member having a photoconductive layer of amorphous silicon. The photoconductive layer is preferably formed by the glow discharge process and includes about 10 -5 to 5×10 -2 atomic % of oxygen, about 10 to 40 atomic % of hydrogen and about 10 to 20000 ppm of a Group IIIb impurity of the Periodic Table. A barrier layer of amorphous silicon having a thickness of about 0.2 to 5 microns and containing about 0.05 to 1 atomic % of oxygen may also be formed between a substrate and said photoconductive layer.
Inventors
- 👤 Takao Kawamura
- 👤 Masazumi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:19
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
An electrophotographic sensitive member which comprises a substrate, a barrier layer of amorphous silicon having a thickness of about 0.2 to 5 microns and containing about 0.05 to 1 atomic % of oxygen and a photoconductive layer of amorphous silicon formed on said barrier layer and containing about 10 -5 to 5×10 -2 atomic % of oxygen, about 10 to 40 atomic % of hydrogen and about 10 to 20000 ppm of a Group IIIa impurity of the Periodic Table.
Claim 2
Dependent Claim
80 words
An electrophotographic sensitive member which comprises a substrate, a barrier layer of amorphous silicon having a thickness of about 0.2 to 5 microns and containing about 0.05 to 1 atomic % of oxygen and a photoconductive layer of amorphous silicon formed on said barrier layer and containing about 10 -5 to 5×10 -2 atomic % of oxygen, about 10 to 40 atomic % of hydrogen and about 10 to 20000 ppm of a Group IIIa impurity of the Periodic Table.
Claim 3
Dependent Claim
26 words
An electrophotographic sensitive member as claimed in claim 1 wherein both of said barrier layer and said photoconductive layer are formed by the glow discharge process.
Claim 4
Dependent Claim
42 words
An electrophotographic sensitive member as claimed in claim 1 wherein said barrier layer preferably contains about 0.05 to 0.5 atomic % of oxygen and as much as about 1 atomic % of oxygen when the thickness is about 0.2 to 0.04 micron.
Claim 5
Dependent Claim
14 words
An electrophotographic sensitive member as claimed in claim 2 wherein said impurity is boron.
Claim 6
Dependent Claim
109 words
An electrophotographic sensitive member which comprises, a barrier layer of amorphous silicon formed by the glow discharge process and having a thickness of about 0.2 to 5 micron and containing about 0.05 to 0.5 atomic % of oxygen but containing as much as about 1 atomic % when the thickness is about 0.2 to 0.4 micron, and a photoconductive layer of amourphous silicon formed by the glow discharge process and having a thickness of about 5 to 100 microns, said photoconductive layer including about 10 -5 to 5×10 -2 atomic % of oxygen, about 10 to 40 atomic % of hydrogen and about 10 to 20000 ppm of boron.
Claim 7
Dependent Claim
109 words
An electrophotographic sensitive member which comprises, a barrier layer of amorphous silicon formed by the glow discharge process and having a thickness of about 0.2 to 5 micron and containing about 0.05 to 0.5 atomic % of oxygen but containing as much as about 1 atomic % when the thickness is about 0.2 to 0.4 micron, and a photoconductive layer of amourphous silicon formed by the glow discharge process and having a thickness of about 5 to 100 microns, said photoconductive layer including about 10 -5 to 5×10 -2 atomic % of oxygen, about 10 to 40 atomic % of hydrogen and about 10 to 20000 ppm of boron.
Claim 8
Dependent Claim
42 words
An electrophotographic sensitive member as claimed in claim 2 wherein said barrier layer preferably contains about 0.05 to 0.5 atomic % of oxygen and as much as about 1 atomic % of oxygen when the thickness is about 0.2 to 0.4 micron.
References Cited (Backward Citations)
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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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |