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US4868077A
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Layered photosensitive material for electrophotography comprising selenium, arsenic and tellurium
Assignee: Fuji Electric Co Ltd
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Filing: 1988-05-10
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Granted: 1989-09-19
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Expires: 2008-05-10
Abstract
Abstract A photosensitive material for electrophotography is provided, which comprises in sequence an electroconductive substrate, a carrier transport layer composed of a selenium-arsenic alloy, a carrier generation layer composed of a selenium-tellurium alloy and a surface coating layer composed of a selenium-arsenic alloy. The present invention further relates to a photosensitive material having a carrier transport layer that is doped with iodine as well.
Inventors
- 👤 Mitsuru Narita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207; G03G5/043; G03G5/0433; G03G5/14; G03G5/147; G03G5/14704
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
A photosensitive material for electrophotography, which comprises in sequence (a) an electroconductive substrate; (b) a carrier transport layer composed of a selenium-arsenic alloy; (c) a carrier generation layer composed of a selenium-tellurium alloy; and (d) a surface coating layer composed of a selenium-arsenic alloy.
Claim 2
Dependent Claim
44 words
A photosensitive material for electrophotography, which comprises in sequence (a) an electroconductive substrate; (b) a carrier transport layer composed of a selenium-arsenic alloy; (c) a carrier generation layer composed of a selenium-tellurium alloy; and (d) a surface coating layer composed of a selenium-arsenic alloy.
Claim 3
Dependent Claim
23 words
The photosensitive material according to claim 1, wherein the arsenic concentration in the carrier transport layer is from 5 to 40 atomic %.
Claim 4
Dependent Claim
23 words
The photosensitive material for electrophotography according to claim 2, wherein the carrier transport layer also contains from 100 to 10,000 ppm of iodine.
Claim 5
Dependent Claim
22 words
The photosensitive material of claim 1, wherein the tellurium concentration in the carrier generation layer is from 20 to 40 atomic %.
Claim 6
Dependent Claim
27 words
The photosensitive material according to claims 1, 2, 3 or 4, wherein the arsenic concentration in the surface coating layer is from 5 to 40 atomic %.
Claim 7
Dependent Claim
65 words
The photosensitive material for electrophotography which comprises in sequence: (a) an electroconductive substrate; (b) a carrier transport layer composed of a selenium-arsenic ally comprising 5 to 40 atomic % arsenic; (c) a carrier generation layer composed of a selenium-tellurium alloy comprising 20 to 40 atomic % tellurium; and (d) a surface coating layer composed of a selenium-arsenic alloy comprising 5 to 40 atomic % arsenic.
Claim 8
Dependent Claim
65 words
The photosensitive material for electrophotography which comprises in sequence: (a) an electroconductive substrate; (b) a carrier transport layer composed of a selenium-arsenic ally comprising 5 to 40 atomic % arsenic; (c) a carrier generation layer composed of a selenium-tellurium alloy comprising 20 to 40 atomic % tellurium; and (d) a surface coating layer composed of a selenium-arsenic alloy comprising 5 to 40 atomic % arsenic.
Claim 9
Dependent Claim
20 words
The photosensitive material according to claim 6, wherein the carrier transport layer also contains from 100 to 10,000 ppm iodine.
Claim 10
Dependent Claim
30 words
The photosensitive material according to claim 1, wherein the concentration of arsenic in the carrier transport layer is at such a level to maintain crystallization resistance and high temperature stability.
Claim 11
Dependent Claim
35 words
The photosensitive material according to claim 8, wherein the concentration of tellurium in the carrier generation layer is not so high as to cause an increase in dark decay and promote crystallization of the layer.
Claim 12
Dependent Claim
29 words
The photosensitive material according to claim 9, wherein the concentration of arsenic in the surface coating layer is not so high as to decrease the hardness of the layer.
References Cited (Backward Citations)
US3467548A
Cited
US4277551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |