US4992348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member comprising amorphous silicon
Assignee: Sharp Corp
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Filing: 1989-06-27
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Granted: 1991-02-12
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Expires: 2009-06-27
Abstract
Abstract A photosensitive member for electrophotography which comprises a conductive substrate and a photoconductive layer which is composed of an amorphous silicon layer and an amorphous silicon germanium layer containing a specific amount of hydrogen and/or halogen respectively, and being prepared by electron cyclotron resonance method respectively, which is useful for xerographic systems.
Inventors
- 👤 Takashi Hayakawa
- 👤 Shiro Narikawa
- 👤 Kunio Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:42
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: 15
Claim 1
Independent Claim
101 words
A photosensitive member for electrophotography comprising a conductive substrate and a photoconductive layer; said photoconductive layer comprising two amorphous layers, one of said two amorphous layers being composed of an amorphous silicon containing a member selected from the group consisting of hydrogen, halogen and mixtures thereof at a range of from greater than 40 to about 65 atomic %, and the other of said two amorphous layers being composed of an amorphous silicon germanium containing a member selected from the group consisting of hydrogen, halogen and mixtures thereof at a range of from greater than 40 to about 65 atomic %.
Claim 2
Dependent Claim
101 words
A photosensitive member for electrophotography comprising a conductive substrate and a photoconductive layer; said photoconductive layer comprising two amorphous layers, one of said two amorphous layers being composed of an amorphous silicon containing a member selected from the group consisting of hydrogen, halogen and mixtures thereof at a range of from greater than 40 to about 65 atomic %, and the other of said two amorphous layers being composed of an amorphous silicon germanium containing a member selected from the group consisting of hydrogen, halogen and mixtures thereof at a range of from greater than 40 to about 65 atomic %.
Claim 3
Dependent Claim
23 words
The photosensitive member according to claim 1, wherein the amorphous layer composed of amorphous silicon is deposited utilizing an electron cyclotron resonance method.
Claim 4
Dependent Claim
24 words
The photosensitive member according to claim 1, wherein the amorphous layer composed of amorphous silicon germanium is deposited utilizing an electron cyclotron resonance method.
Claim 5
Dependent Claim
26 words
The photosensitive member according to claim 1, wherein at least one of said amorphous silicon and said amorphous silicon germanium contains hydrogen at 43-55 atomic %.
Claim 6
Dependent Claim
21 words
The photosensitive member according to claim 1, wherein said amorphous silicon germanium contains germanium at 5.3-150 atomic %, based on Si.
Claim 7
Dependent Claim
21 words
The photosensitive member according to claim 5, wherein said amorphous silicon germanium contains germanium at 18-82 atomic %, based on Si.
Claim 8
Dependent Claim
21 words
The photosensitive member according to claim 6, wherein said amorphous silicon germanium contains germanium at 43-67 atomic %, based on Si.
Claim 9
Dependent Claim
35 words
The photosensitive member according to claim 1, wherein the layer of amorphous silicon as lower side and the layer of amorphous silicon germanium as upper side are laminated in this order on said conductive substrate.
Claim 10
Dependent Claim
35 words
The photosensitive member according to claim 1, wherein the layer of amorphous silicon germanium as lower side and the layer of amorphous silicon as upper side are laminated in this order on said conductive substrate.
Claim 11
Dependent Claim
24 words
The photosensitive member according to claim 8, wherein the germanium content in the amorphous silicon germanium gradually reduces toward the layer of amorphous silicon.
Claim 12
Dependent Claim
24 words
The photosensitive member according to claim 9, wherein the germanium content in the amorphous silicon germanium gradually reduces toward the layer of amorphous silicon.
Claim 13
Dependent Claim
20 words
The photosensitive member according to claim 1, further comprising an intermediate layer between said conductive substrate and the photoconductive layer.
Claim 14
Dependent Claim
29 words
The photosensitive member according to claim 6, wherein said photoconductive layer has a free surface, and further comprising a surface layer over said free surface of the photoconductive layer.
Claim 15
Dependent Claim
15 words
The photosensitive member according to claim 1, wherein said conductive substrate comprises an aluminum plate.
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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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |