US4451546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive member
Assignee: Kyocera Corp
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Filing: 1983-03-07
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Granted: 1984-05-29
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Expires: 2003-03-07
Abstract
Abstract The invention disclosed relates to a photosensitive member having excellent photosensitivity characteristics in the visible light region as well as in the near infrared region. The photosensitive member according to the invention comprises an electrically-conductive substrate, an amorphous silicon semiconductor layer, an amorphous silicon-germanium photoconductive layer formed on the semiconductor layer, and an amorphous silicon photoconductive layer formed the amorphous silicon-germanium photoconductive layer.
Inventors
- 👤 Takao Kawamura
- 👤 Masazumi Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08235
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A photosensitive member which comprises an electrically conductive substrate, an amorphous silicon semiconductor layer, an amorphous silicon-germanium photoconductive layer having a thickness of about 0.1 to 3 microns and an amorphous silicon photoconductive layer having a thickness of about 0.1 to 3 microns.
Claim 2
Dependent Claim
43 words
A photosensitive member which comprises an electrically conductive substrate, an amorphous silicon semiconductor layer, an amorphous silicon-germanium photoconductive layer having a thickness of about 0.1 to 3 microns and an amorphous silicon photoconductive layer having a thickness of about 0.1 to 3 microns.
Claim 3
Dependent Claim
116 words
A photosensitive member which comprises an electrically conductive substrate, an amorphous silicon semiconductor layer having a thickness of about 5 to 100 microns and which functions as a charge retaining layer; an amorphous silicon-germanium photoconductive layer formed on said amorphous silicon semiconductor layer and having a thickness of about 0.1 to 3 microns, said photoconductive layer ensures the photosensitivity in the long wavelength region of 700 nm or more and a molar ratio of silicon to germanium is about 1:1 to 19:1; and an amorphous silicon, ductive layer formed on said amorphous silicon-germanium photoconductive layer and having a thickness of about 0.1 to 3 microns, said photoconductive layer ensures the photosensitivity of the visible light region.
Claim 4
Dependent Claim
116 words
A photosensitive member which comprises an electrically conductive substrate, an amorphous silicon semiconductor layer having a thickness of about 5 to 100 microns and which functions as a charge retaining layer; an amorphous silicon-germanium photoconductive layer formed on said amorphous silicon semiconductor layer and having a thickness of about 0.1 to 3 microns, said photoconductive layer ensures the photosensitivity in the long wavelength region of 700 nm or more and a molar ratio of silicon to germanium is about 1:1 to 19:1; and an amorphous silicon, ductive layer formed on said amorphous silicon-germanium photoconductive layer and having a thickness of about 0.1 to 3 microns, said photoconductive layer ensures the photosensitivity of the visible light region.
Claim 5
Dependent Claim
38 words
A photosensitive member as claimed in claim 2 wherein said amorphous silicon-germanium photoconductive layer includes hydrogen, no more than 20000 ppm of a Group IIIA impurity of the Periodic Table and less than 0.05 atimic % of oxygen.
Claim 6
Dependent Claim
31 words
A photosensitive member as claimed in claim 3 wherein said amorphous silicon photoconductive layer includes hydrogen and no more than 20000 ppm of a Group IIIA impurity of the Periodic Table.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |