US4560634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member using microcrystalline silicon
Assignee: Toshiba Corp
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Filing: 1982-05-26
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Granted: 1985-12-24
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Expires: 2002-05-26
Abstract
Abstract An electrophotographic photosensitive member constituted of an electroconductive supporting substrate and a photoconductive layer provided on said substrate, said photoconductive layer being composed primarily of a microcrystalline silicon or a layered product of a microcrystalline silicon and an amorphous silicon.
Inventors
- 👤 Takeshi Matsuo
- 👤 Yukio Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:25
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
75 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer provided on said supporting substrate, wherein said photoconductive layer consists essentially of a crystalline silicon having a specific dark resistance greater than 10 6 ohm cm, said crystalline silicon being produced by a glow discharge method under the following conditions: supporting substrate temperature: 300°-350° C.; powder density: 0.5-5 W/cm 2 ; and pressure: 0.01-10 Torr, using hydrogen as a carrier gas.
Claim 2
Dependent Claim
75 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer provided on said supporting substrate, wherein said photoconductive layer consists essentially of a crystalline silicon having a specific dark resistance greater than 10 6 ohm cm, said crystalline silicon being produced by a glow discharge method under the following conditions: supporting substrate temperature: 300°-350° C.; powder density: 0.5-5 W/cm 2 ; and pressure: 0.01-10 Torr, using hydrogen as a carrier gas.
Claim 3
Dependent Claim
25 words
An electrophotographic photosensitive member according to claim 1, wherein said photosensitive member further comprises a layer comprised of amorphous silicon disposed on said photoconductive layer.
Claim 4
Dependent Claim
18 words
An electrophotographic photosensitive member according to claim 2, wherein said photoconductive layer is adjacent to said supporting substrate.
Claim 5
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 2, wherein said layer comprised of amorphous silicon layer is adjacent to said supporting substrate.
Claim 6
Dependent Claim
25 words
An electrophotographic photosensitive member according to claim 1 or claim 2, wherein the photoconductive layer is doped with 5 to 30 atomic % of hydrogen.
Claim 7
Dependent Claim
30 words
An electrophotographic photosensitive member according to claim 1 or claim 2, wherein at least one from the group consisting of oxygen, nitrogen and carbon is doped in the photoconductive layer.
Claim 8
Dependent Claim
30 words
An electrophotographic photosensitive member according to claim 6, wherein the doping amount of at least one kind of oxygen, nitrogen and carbon is 10 -4 to 10 -3 atomic %.
Claim 9
Dependent Claim
32 words
An electrophotographic photosensitive member according to claim 1 or claim 2, wherein an element of the Group III A of the periodic table is doped as a dopant in the photoconductive layer.
Claim 10
Dependent Claim
32 words
An electrophotographic photosensitive member according to claim 8, wherein the doping amount of an element of the Group III A of the periodic table is 10 -6 to 10 -4 atomic %.
Claim 11
Dependent Claim
32 words
An electrophotographic photosensitive member according to claim 1 or claim 2, wherein an element of the Group V A of the periodic table is doped as a dopant in the photoconductive layer.
Claim 12
Dependent Claim
32 words
An electrophotographic photosensitive member according to claim 10, wherein the doping amount of an element of the Group V A in the photoconductive layer is 10 -5 to 10 -2 atomic %.
Claim 13
Dependent Claim
21 words
An electrophotographic photosensitive member according to claim 1 or claim 2, having further a surface protective layer on the photoconductive layer.
Claim 14
Dependent Claim
21 words
An electrophotographic photosensitive member according to claim 1 or claim 2, further having a reflection prevention layer on the photoconductive layer.
Claim 15
Dependent Claim
29 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer wherein said photoconductive layer consists essentially of silicon having a crystal diffraction pattern at 27°.
Claim 16
Dependent Claim
29 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer wherein said photoconductive layer consists essentially of silicon having a crystal diffraction pattern at 27°.
Claim 17
Dependent Claim
31 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer wherein said photoconductive layer consists essentially of silicon having microcrystals with particle sizes of several 10 angstroms.
Claim 18
Dependent Claim
31 words
An electrophotographic photosensitive member, which comprises an electroconductive supporting substrate and a photoconductive layer wherein said photoconductive layer consists essentially of silicon having microcrystals with particle sizes of several 10 angstroms.
Claim 19
Dependent Claim
30 words
An electrophotographic photosensitive member according to claim 3, wherein the ratio of the thickness of said lower layer to the thickness of said upper layer is about 0.01-0.5 to 1.
Claim 20
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 16, wherein said ratio is about 0.1-0.5 to 1.
Claim 21
Dependent Claim
30 words
An electrophotographic photosensitive member according to claim 2, wherein said supporting substrate temperature is 320°-350° C., said power density is 0.5-5 W/cm 2 , and said pressure is 0.02-0.2 Torr.
Claim 22
Dependent Claim
30 words
An electrophotographic photosensitive member according to claim 4, wherein the ratio of the thickness of said upper layer to the thickness of said lower layer is about 0.01-0.5 to 1.
Claim 23
Dependent Claim
16 words
An electrophotographic photosensitive member according to claim 19, wherein said ratio is about 0.1-0.5 to 1.
Claim 24
Dependent Claim
23 words
An electrophotographic photosensitive member according to claim 1, wherein said crystalline silicon has a specific dark resistance of 10 11 ohm.cm or more.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |