Patent US4420546A successfully refreshed from Google Patents.
US4420546A
Expired / Lapsed
US
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Member for electrophotography with a-Si and c-Si layers
Assignee: Canon Inc
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Filing: 1981-08-20
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Granted: 1983-12-13
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Expires: 2001-08-20
Abstract
Abstract An electrophotographic image forming member having on a substrate a photoconductive layer constructed by laminating a crystalline silicon layer and an amorphous silicon layer.
Inventors
- 👤 Junichiro Kanbe
- 👤 Tadaji Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
116 words
An electrophotographic image forming member which comprises: (a) a substrate for use in an electrophotographic process, and (b) a photoconductive layer constructed with (i) a crystalline silicon layer from 100 Å to 1 micron in thickness overlying said substrate, and (ii) an amorphous layer from 3 to 100 microns in thickness overlying said crystalline silicon layer, wherein said amorphous layer consists essentially of an amorphous material containing silicon atom as a matrix and a member selected from the group consisting of hydrogen atom in amounts from 1 to 40 atomic percent, halogen atom in amounts from 1 to 40% and a mixture of hydrogen atom and halogen atom in amounts from 1 to 40 atomic percent.
Claim 2
Dependent Claim
116 words
An electrophotographic image forming member which comprises: (a) a substrate for use in an electrophotographic process, and (b) a photoconductive layer constructed with (i) a crystalline silicon layer from 100 Å to 1 micron in thickness overlying said substrate, and (ii) an amorphous layer from 3 to 100 microns in thickness overlying said crystalline silicon layer, wherein said amorphous layer consists essentially of an amorphous material containing silicon atom as a matrix and a member selected from the group consisting of hydrogen atom in amounts from 1 to 40 atomic percent, halogen atom in amounts from 1 to 40% and a mixture of hydrogen atom and halogen atom in amounts from 1 to 40 atomic percent.
Claim 3
Dependent Claim
32 words
The image forming member as set forth in claim 1, wherein said photoconductive layer contains at least one member selected from the group consisting of oxygen atom, nitrogen atom, and carbon atom.
Claim 4
Dependent Claim
24 words
The image forming member as set forth in claim 2, wherein the content of said oxygen atom ranges from 0.01 to 30 atomic %.
Claim 5
Dependent Claim
24 words
The image forming member as set forth in claim 2, wherein the content of said oxygen atom ranges from 0.1 to 15 atomic %.
Claim 6
Dependent Claim
24 words
The image forming member as set forth in claim 2, wherein the content of said nitrogen atom ranges from 0.01 to 30 atomic %.
Claim 7
Dependent Claim
24 words
The image forming member as set forth in claim 2, wherein the content of said nitrogen atom ranges from 0.1 to 15 atomic %.
Claim 8
Dependent Claim
24 words
The image forming member as set forth in claim 2, wherein the content of said carbon atom ranges from 0.1 to 50 atomic %.
Claim 9
Dependent Claim
23 words
The image forming member as set forth in claim 1, comprising additionally a surface covering layer on the surface of said photoconductive layer.
Claim 10
Dependent Claim
25 words
The image forming member as set forth in claim 8, wherein the layer thickness of said surface covering layer ranges from 0.5 to 70 microns.
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) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |