US4873165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoreceptor having overlayer comprising carbon
Assignee: Fujifilm Business Innovation Corp
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Filing: 1988-01-15
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Granted: 1989-10-10
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Expires: 2008-01-15
Abstract
Abstract An electrophotographic photoreceptor is disclosed, which comprises a support, a light-sensitive layer and a surface layer, the surface layer being predominantly composed of carbon and containing an element capable of forming a tetrahedral bond.
Inventors
- 👤 Ken-ichi Karakida
- 👤 Shigeru Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:53
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0433; G03G5/08; G03G5/082; G03G5/08285; G03G5/14; G03G5/147; G03G5/14704
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
An electrophotographic photorecorder which comprises (1) a support; (2) a light-sensitive layer comprising an i-type semiconductor layer that is predominantly composed of amorphous silicon and contains a small amount of an element of group IIIB of the periodic table; and (3) a surface layer having a thickness of from 0.01 to 10 μm provided on the i-type semiconductor layer, said surface layer being predominantly composed of carbon and containing an element capable of forming a tetrahedral bond.
Claim 2
Dependent Claim
77 words
An electrophotographic photorecorder which comprises (1) a support; (2) a light-sensitive layer comprising an i-type semiconductor layer that is predominantly composed of amorphous silicon and contains a small amount of an element of group IIIB of the periodic table; and (3) a surface layer having a thickness of from 0.01 to 10 μm provided on the i-type semiconductor layer, said surface layer being predominantly composed of carbon and containing an element capable of forming a tetrahedral bond.
Claim 3
Dependent Claim
18 words
An electrophotographic photoreceptor as in claim 1, wherein said element capable of forming a tetrahedral bond is silicon.
Claim 4
Dependent Claim
18 words
An electrophotographic photoreceptor as in claim 1, wherein said surface layer is formed by a plasma-assisted CVD method.
Claim 5
Dependent Claim
13 words
An electrophotographic photoreceptor as in claim 1, wherein said surface layer contains hydrogen.
Claim 6
Dependent Claim
36 words
An electrophotographic photoreceptor as in claim 1, wherein the number of atoms of the element capable of forming a tetrahedral bond incorporated into the surface layer is 0.5 or less per one atom of carbon atom.
Claim 7
Dependent Claim
19 words
An electrophotographic photoreceptor as in claim 1, wherein a thickness of the light-sensitive layer is from to 200 μm.
Claim 8
Dependent Claim
18 words
An electrophotographic photoreceptor as in claim 1, wherein the light-sensitive layer is formed by a plasma-assisted CVD method.
Claim 9
Dependent Claim
24 words
An electrophotographic photoreceptor as in claim 1, wherein said surface layer contains boron in an amount of from 0.1 to 100 ppm by volume.
Claim 10
Dependent Claim
38 words
An electrophotographic photoreceptor as in claim 1, wherein the number of atoms of said element capable of forming a tetrahedral bond incorporated into said surface layer is from about 0.01 to 0.1 per one atom of carbon atom.
Claim 11
Dependent Claim
48 words
An electrophotographic photoreceptor as in claim 1, wherein said surface layer is formed by decomposition using a plasma-assisted CVD method of a gas or gaseous form of a hydrocarbon compound and a gas or gaseous form of a material containing said element capable of forming a tetrahedral bond.
Claim 12
Dependent Claim
74 words
An electrophotographic photoreceptor as in claim 10, wherein said hydrocarbon compound is selected from the group consisting of paraffinic hydrocarbons represented by formula C n H 2n+2 , where n is 1 to 10; olefinic hydrocarbons represented by formula C n H 2n , where n is 2 to 10; acetylenic hydrocarbons represented by C n H 2n-2 , where n is 2 to 10; alicyclic hydrocarbons; aromatic compounds; and organic substituted compounds thereof.
Claim 13
Dependent Claim
40 words
An electrophotographic photoreceptor as in claim 10, wherein said gas or gaseous form of a material containing an element capable of forming a tetrahedral bond is selected from the group consisting of silicon hydrides, silicon halide and organic silicon compounds.
References Cited (Backward Citations)
US4687722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-09 | 1993-04-10 | 1993-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-09 | 1997-04-10 | 1997-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-09 | 2001-04-10 | 2001-10-10 | $7700.00 | Window Closed / Lapsed |