US5100749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive member for electrophotography
Assignee: Sharp Corp
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Filing: 1991-02-19
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Granted: 1992-03-31
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Expires: 2011-02-19
Abstract
Abstract An improved photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of a amorphous silicon containing hydrogen and/or halogen of 40 at. % or more.
Inventors
- 👤 Shiro Narikawa
- 👤 Takashi Hayakawa
- 👤 Kunio Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08278; G03G5/08221
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a -Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the intermediate layer is made of an a-Si layer doped with a n-type impurity.
Claim 2
Dependent Claim
69 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a -Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the intermediate layer is made of an a-Si layer doped with a n-type impurity.
Claim 3
Dependent Claim
67 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the surface protecting layer is made of an a-SiC, a-SiN or a -SiO.
Claim 4
Dependent Claim
67 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the surface protecting layer is made of an a-SiC, a-SiN or a -SiO.
Claim 5
Dependent Claim
63 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and which is used as a photosensitive member of negative charge type.
Claim 6
Dependent Claim
63 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and which is used as a photosensitive member of negative charge type.
Claim 7
Dependent Claim
80 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the photoconductive layer has a photoconductivity of 10 -7 to 10 -6 cm 2 /V with a dark conductivity of 10 -11 to 10 12 S/cm.
Claim 8
Dependent Claim
80 words
A photosensitive member for electrophotography which comprises an intermediate layer, a photoconductive layer and a surface protecting layer each formed upwardly in this order on a conductive substrate, the photoconductive layer comprising a non-doped a-Si layer made of an amorphous silicon containing hydrogen and/or halogen of 40 at. % or more and in which the photoconductive layer has a photoconductivity of 10 -7 to 10 -6 cm 2 /V with a dark conductivity of 10 -11 to 10 12 S/cm.
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) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |