US4755444A
Expired / Lapsed
US
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Electrophotographic photoreceptor
Assignee: Fujifilm Business Innovation Corp
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Filing: 1986-12-23
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Granted: 1988-07-05
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Expires: 2006-12-23
Abstract
Abstract An electrographic photoreceptor comprising a support, an intrinsic silicon photosensitive layer and a surface layer of amophous silicon. To the surface layer is added either hydrogen, germanium, tin or lead in order to use the dangling bonds of the amorphous carbon.
Inventors
- 👤 Kenichi Karakida
- 👤 Shigeru Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08285
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
An electrographic photoreceptor, comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed by decomposition of a mixed gas comprising a hydrogen-containing gas and a second gas selected from the group consisting of hydrocarbon compounds and halogenated hydrocarbons on said photosensitive layer, said amorphous carbon surface layer comprising carbon atoms and hydrogen atoms in a hydrogen to carbon atomic ratio no greater than 1.
Claim 2
Dependent Claim
71 words
An electrographic photoreceptor, comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed by decomposition of a mixed gas comprising a hydrogen-containing gas and a second gas selected from the group consisting of hydrocarbon compounds and halogenated hydrocarbons on said photosensitive layer, said amorphous carbon surface layer comprising carbon atoms and hydrogen atoms in a hydrogen to carbon atomic ratio no greater than 1.
Claim 3
Dependent Claim
33 words
A photoreceptor as recited in claim 1, wherein said amorphous carbon surface layer further comprising a predetermined amount of at least one element selected from the group consisting of germanium, tin and lead.
Claim 4
Dependent Claim
30 words
A photoreceptor as recited in claim 1, wherein said amorphous carbon surface layer comprises carbon atoms and hydrogen atoms in a hydrogen to carbon atomic ratio no greater than 0.5.
Claim 5
Dependent Claim
15 words
A photoreceptor as recited in claim 1, wherein said photosensitive layer is a silicon layer.
Claim 6
Dependent Claim
16 words
A photoreceptor as recited in claim 4, wherein said silicon layer is an intrinsic semiconductor layer.
Claim 7
Dependent Claim
34 words
A photoreceptor as recited in claim 2, wherein said element selected from the group consisting of germanium, tin, and lead is present in an atomic ratio no greater than 0.5 with respect to carbon.
Claim 8
Dependent Claim
15 words
A photoreceptor as recited in claim 2, wherein said photosensitive layer is a silicon layer.
Claim 9
Dependent Claim
16 words
A photoreceptor as recited in claim 2, wherein said silicon layer is an intrinsic semiconductor layer.
Claim 10
Dependent Claim
102 words
An electrographic photoreceptor comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed by decomposition of a mixed gas comprising a first gas selected from the group consisting of hydrocarbons and halogenated hydrocarbons, and a second gas containing at least one element selected from the group consisting of germanium, tin, and lead, said amorphous carbon surface layer comprising carbon atoms, atoms of at least one element selected from the group consisting of germanium, tin, and lead, and hydrogen atoms, wherein said hydrogen is present in a hydrogen to carbon atomic ratio no greater than 1.
Claim 11
Dependent Claim
102 words
An electrographic photoreceptor comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed by decomposition of a mixed gas comprising a first gas selected from the group consisting of hydrocarbons and halogenated hydrocarbons, and a second gas containing at least one element selected from the group consisting of germanium, tin, and lead, said amorphous carbon surface layer comprising carbon atoms, atoms of at least one element selected from the group consisting of germanium, tin, and lead, and hydrogen atoms, wherein said hydrogen is present in a hydrogen to carbon atomic ratio no greater than 1.
Claim 12
Dependent Claim
60 words
An electrographic photoreceptor comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed on said photosensitive layer, said surface layer comprising carbon atoms and atoms of at least one element selected from the group consisting of germanium, tin, and lead, present in an atomic ratio no greater than 1 with respect to carbon.
Claim 13
Dependent Claim
60 words
An electrographic photoreceptor comprising: a support; a photosensitive layer formed on said support; and an amorphous carbon surface layer formed on said photosensitive layer, said surface layer comprising carbon atoms and atoms of at least one element selected from the group consisting of germanium, tin, and lead, present in an atomic ratio no greater than 1 with respect to carbon.
Claim 14
Dependent Claim
17 words
A photoreceptor as recited in claim 1, wherein said second gas is methane, ethylene, or carbon tetrafluoride.
Claim 15
Dependent Claim
26 words
A photoreceptor as recited in claim 9, wherein said first gas is methane or ethane and said second gas is germane, tetramethyl germane, stannane, or plumbane.
Claim 16
Dependent Claim
21 words
A photoreceptor as recited in claim 1, wherein said surface layer has a hydrogen content not greater than 30 atomic percent.
References Cited (Backward Citations)
US4634647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |