Patent US4642279A successfully refreshed from Google Patents.
US4642279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive member with an insulating layer of amorphous silicon
Assignee: Minolta Co Ltd
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Filing: 1985-07-10
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Granted: 1987-02-10
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Expires: 2005-07-10
Abstract
Abstract The present invention relates to a photosensitive member which includes a photoconductive layer of amorphous silicon and an insulating layer formed thereover and including amorphous silicon, carbon and an element in Group III A of the Periodic Table. Carbon is included in an amount of about 35 to 65 atomic % at the outer most surface of the insulating layer and a minimum amount at the interface with the photoconductive layer. The Group III A element is included to control a majority carrier of the insulating layer to be a polarity opposite to the polarity of charging.
Inventors
- 👤 Yukio Tanigami
- 👤 Shuji Iino
- 👤 Mitsutoshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:03
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221; G03G5/08228
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer including amorphous silicon and having a thickness of about 10 to 100 microns; and an insulating layer formed on said photoconductive layer and including amorphous silicon, carbon and an element in Group III A of the Periodic Table, said carbon being included in an amount of about 35 to 65 atomic % at the outermost surface of said insulation layer and the amount is minimum at the boundry with said photoconductive layer, and said Group III A element being included to control a majority carrier of said layer to be a polarity opposite to the polarity of charging.
Claim 2
Dependent Claim
109 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer including amorphous silicon and having a thickness of about 10 to 100 microns; and an insulating layer formed on said photoconductive layer and including amorphous silicon, carbon and an element in Group III A of the Periodic Table, said carbon being included in an amount of about 35 to 65 atomic % at the outermost surface of said insulation layer and the amount is minimum at the boundry with said photoconductive layer, and said Group III A element being included to control a majority carrier of said layer to be a polarity opposite to the polarity of charging.
Claim 3
Dependent Claim
28 words
A photosensitive member as claimed in claim 1 wherein said Group III A element is included in the amount of about 5 to 20 ppm for positive charging.
Claim 4
Dependent Claim
27 words
A photosensitive member as claimed in claim 1 wherein said Group III A element is included in the amount of 200 to 10,000 ppm for negative charging.
Claim 5
Dependent Claim
39 words
A photosensitive member as claimed in claim 1 wherein said carbon is included in said insulating layer in a gradient manner to continuously increase from the boundry with said photoconductive layer to the outermost surface of said insulating layer.
Claim 6
Dependent Claim
47 words
A photosensitive member as claimed in claim 1 wherein said carbon is included in said insulating layer in a gradient manner to continuously increase from the boundry with said photoconductive layer to a given thickness and at constant amount to the outermost surface of said insulating layer.
Claim 7
Dependent Claim
21 words
A photosensitive member as claimed in claim 4 wherein the thickness of said insulating layer is about 0.02 to 1.5 microns.
Claim 8
Dependent Claim
21 words
A photosensitive member as claimed in claim 5 wherein the thickness of said insulating layer is about 0.03 to 2.4 microns.
Claim 9
Dependent Claim
25 words
A photosensitive member as claimed in claim 1 wherein said insulating layer further include oxygen in, an amount of about 0.05 to 10 atomic %.
Claim 10
Dependent Claim
118 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer including amorphous silicon and having a thickness of about 10 to 100 microns; and an insulating layer formed on said photoconductive layer and including amorphous silicon, carbon, oxygen in an amount of about 0.05 to 10 atomic % and an element in Group III A of the periodic Table, said carbon being included in an amount of about 35 to 65 atomic % at the outermost surface of said insulation layer and a minimum at the boundary with said photoconductive layer, and said Group III A element being included to control a majority carrier of said layer to be a polarity opposite to the polarity of charging.
Claim 11
Dependent Claim
118 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer including amorphous silicon and having a thickness of about 10 to 100 microns; and an insulating layer formed on said photoconductive layer and including amorphous silicon, carbon, oxygen in an amount of about 0.05 to 10 atomic % and an element in Group III A of the periodic Table, said carbon being included in an amount of about 35 to 65 atomic % at the outermost surface of said insulation layer and a minimum at the boundary with said photoconductive layer, and said Group III A element being included to control a majority carrier of said layer to be a polarity opposite to the polarity of charging.
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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |