Patent US4642278A successfully refreshed from Google Patents.
US4642278A
Expired / Lapsed
US
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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 having a photoconductive layer of amorphous silicon. On the photoconductive layer, an amorphous silicon insulating layer is formed and this layer includes carbon and an element in Group IIIA of the Periodic Table. The Group IIIA element is included to control the conductivity of the insulating layer in such fashion that the majority carrier thereof is opposite in polarity to the charging polarity.
Inventors
- 👤 Yukio Tanigami
- 👤 Shuji Iino
- 👤 Mitsutoshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer of amorphous silicon; and an insulating layer of amorphous silicon formed on said photoconductive layer and including at least carbon and an element in Group IIA of the Periodic table.
Claim 2
Dependent Claim
41 words
A photosensitive member which comprises: a conductive substrate; a photoconductive layer of amorphous silicon; and an insulating layer of amorphous silicon formed on said photoconductive layer and including at least carbon and an element in Group IIA of the Periodic table.
Claim 3
Dependent Claim
92 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 of about 0.01 to 3 micron thick formed on said photoconductive layer and including amorphous silicon, about 5 to 70 atomic % of carbon and an element in Group IIIA of the Periodic Table, said Group IIIA element being included in an amount to control the majority carrier of said insulating layer to be opposite in polarity to charges produced on said insulating layer.
Claim 4
Dependent Claim
92 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 of about 0.01 to 3 micron thick formed on said photoconductive layer and including amorphous silicon, about 5 to 70 atomic % of carbon and an element in Group IIIA of the Periodic Table, said Group IIIA element being included in an amount to control the majority carrier of said insulating layer to be opposite in polarity to charges produced on said insulating layer.
Claim 5
Dependent Claim
27 words
A photosensitive member as claimed in claim 2 wherein said Group IIIA element is included in the amount of about 200 to 10000 ppm for negative charging.
Claim 6
Dependent Claim
27 words
A photosensitive member as claimed in claim 2 wherein said Group IIIA element is included in the amount of about 5 to 20 ppm for positive charging.
Claim 7
Dependent Claim
25 words
A photosensitive member as claimed in claim 2 wherein said photoconductive layer further includes oxygen in an amount of less than about 10 atomic %.
Claim 8
Dependent Claim
99 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 about 0.01 to 3 microns thick formed on said photoconductive layer and including amorphous silicon, about 5 to 70 atomic % of carbon, an element in Group IIIA of the Periodic Table and less than about 10 atomic % of oxygen, said Group IIIA element being included in an amount to control the majority carrier of said insulating layer to be opposite in polarity to charges produced on said insulating layer.
Claim 9
Dependent Claim
99 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 about 0.01 to 3 microns thick formed on said photoconductive layer and including amorphous silicon, about 5 to 70 atomic % of carbon, an element in Group IIIA of the Periodic Table and less than about 10 atomic % of oxygen, said Group IIIA element being included in an amount to control the majority carrier of said insulating layer to be opposite in polarity to charges produced on said insulating layer.
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 |