US4740440A
Expired / Lapsed
US
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Amorphous silicon multilayered photosensitive element containing spherical-dimpled substrate surface
Assignee: Canon Inc
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Filing: 1986-10-16
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Granted: 1988-04-26
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Expires: 2006-10-16
Abstract
Abstract There is provided a light receiving member which comprises a support, a photosensitive layer and a surface layer, said photosensitive layer being composed of amorphous material containing silicon atoms, and at least either germanium atoms or tin atoms and said surface layer being composed of amorphous material containing silicon atoms and at least one kind selected from oxygen atoms, carbon atoms and nitrogen atoms, said support having a surface provided with irregularities composed of spherical dimples, and an optical band gap being matched at the interface between said photosensitive layer and said surface layer. The light receiving member overcomes all of the problems in the conventional light receiving member comprising a light receiving layer composed of an amorphous silicon and, in particular, effectively prevents the occurrence of interference fringe in the formed images due to the interference phenomenon thereby forming visible images of excellent quality even in the case of using coherent laser beams possible producing interference as a light source.
Inventors
- 👤 Mitsuru Honda
- 👤 Atsushi Koike
- 👤 Kyosuke Ogawa
- 👤 Keiichi Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:39
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/0825; G03G5/08257; G03G5/08221; G03G5/08228; G03G5/08235; G03G5/08242; G03G5/10; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A light receiving member which comprises a support, a photosensitive layer and a surface layer, said photosensitive layer being composed of amorphous material containing silicon atoms and at least either germanium atoms or tin atoms and said surface layer being composed of amorphous material containing silicon atoms and at least one kind selected from oxygen atoms, carbon atoms and nitrogen atoms, said support having a surface provided with irregularities composed of spherical dimples, and an optical band gap being matched at the interface between said photosensitive layer and said surface layer.
Claim 2
Dependent Claim
91 words
A light receiving member which comprises a support, a photosensitive layer and a surface layer, said photosensitive layer being composed of amorphous material containing silicon atoms and at least either germanium atoms or tin atoms and said surface layer being composed of amorphous material containing silicon atoms and at least one kind selected from oxygen atoms, carbon atoms and nitrogen atoms, said support having a surface provided with irregularities composed of spherical dimples, and an optical band gap being matched at the interface between said photosensitive layer and said surface layer.
Claim 3
Dependent Claim
28 words
A light receiving member as set forth in claim 1, wherein the photosensitive layer contains at least one kind selected from oxygen atoms, carbon atoms, and nitrogen atoms.
Claim 4
Dependent Claim
21 words
A light receiving member as set forth in claim 1, wherein the photosensitive layer contains a substance to control the conductivity.
Claim 5
Dependent Claim
18 words
A light receiving member as set forth in claim 1, wherein the photosensitive layer is of multi-layered structure.
Claim 6
Dependent Claim
33 words
A light receiving member as set forth in claim 1, wherein the photosensitive layer has as one of the constituent layers a charge injection inhibition layer containing a substance to control the conductivity.
Claim 7
Dependent Claim
24 words
A light receiving member as set forth in claim 1, wherein the photosensitive layer has as one of the constituent layers a barrier layer.
Claim 8
Dependent Claim
30 words
A light receiving member as set forth in claim 1, wherein the irregularities on the surface of the support are composed of spherical dimples having the same radius of curvature.
Claim 9
Dependent Claim
34 words
A light receiving member as set forth in claim 1, wherein the irregularities on the surface of the support are composed of spherical dimples having the same radius of curvature and the same width.
Claim 10
Dependent Claim
40 words
A light receiving member as set forth in claim 1, wherein the irregularities on the surface of the support are those which are formed by letting a plurality of rigid true spheres fall spontaneously on the surface of the support.
Claim 11
Dependent Claim
47 words
A light receiving member as set forth in claim 4, wherein the irregularities on the surface of the support are those which are formed by letting rigid true spheres of almost the same diameter fall spontaneously on the surface of the support from almost the same height.
Claim 12
Dependent Claim
30 words
A light receiving member as set forth in claim 1, wherein the spherical dimples have the radius of curvature R and the width D which satisfy the following equation. 0.035≦D/R
Claim 13
Dependent Claim
21 words
A light receiving member as set forth in claim 6, wherein the spherical dimples have a width smaller than 500 μm.
Claim 14
Dependent Claim
17 words
A light receiving member as set forth in claim 1, wherein the support is a metal body.
Claim 15
Dependent Claim
31 words
An electrophotographic process oomprising: (a) charging the light recieivng member of claim 1; and (b) irradiating said light receiving member with an electromagnetic wave carrying information, thereby forming an electrostatic image.
References Cited (Backward Citations)
US4618552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |