Patent US4172798A successfully refreshed from Google Patents.
US4075013A
Expired / Lapsed
US
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Electrophotochemical preparation of selenium photoconductive members
Assignee: Individual
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Filing: 1976-09-13
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Granted: 1978-02-21
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Expires: 1996-09-13
Abstract
Abstract A method for forming an electrophotographic imaging member comprising electrochemically depositing amorphous selenium on a conductive substrate while simultaneously illuminating the substrate with electromagnetic radiation through a periodic spatial light modulating means. The deposited selenium layer has a periodically varying thickness. The selenium layer is then overcoated with a layer of a charge carrier transport material which is capable of transporting at least one species of charge carrier. The resulting imaging member has extended range and solid area reproduction capability.
Inventors
- 👤 Anthony T. Ward
- 👤 Aleksandar Damjanovic
- 👤 Michael L. Hair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:34
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0436
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A method for forming an electrophotographic imaging member comprising a conducting substrate, a layer of amorphous selenium having a periodically varying thickness and a layer of a charge carrier transport material capable of transporting at least one species of charge carrier comprising: a. cathodically depositing a layer of amorphous selenium on a conducting substrate from a selenious acid electrolyte while simultaneously illuminating said substrate with a periodic spatially modulated pattern of electromagnetic radiation within the absorption band of selenium whereby said selenium layer has a periodically varying thickness which corresponds to said periodic spatially modulated pattern; and b. overcoating said selenium layer with a layer of a charge carrier transport material which is capable of transporting at least one species of charge carrier.
Claim 2
Independent Claim
123 words
A method for forming an electrophotographic imaging member comprising a conducting substrate, a layer of amorphous selenium having a periodically varying thickness and a layer of a charge carrier transport material capable of transporting at least one species of charge carrier comprising: a. cathodically depositing a layer of amorphous selenium on a conducting substrate from a selenious acid electrolyte while simultaneously illuminating said substrate with a periodic spatially modulated pattern of electromagnetic radiation within the absorption band of selenium whereby said selenium layer has a periodically varying thickness which corresponds to said periodic spatially modulated pattern; and b. overcoating said selenium layer with a layer of a charge carrier transport material which is capable of transporting at least one species of charge carrier.
Claim 3
Dependent Claim
20 words
The method as defined in claim 1 wherein said substrate is capable of forming a blocking contact with amorphous selenium.
Claim 4
Dependent Claim
18 words
The method as defined in claim 1 wherein said charge carrier transport material is a hole transport material.
Claim 5
Dependent Claim
18 words
The method as defined in claim 1 wherein said charge carrier transport material is an electron transport material.
Claim 6
Dependent Claim
27 words
The method as defined in claim 1 wherein said periodic spatially modulated pattern of electromagnetic radiation has a frequency of at least about 150 cycles per inch.
Claim 7
Dependent Claim
13 words
The method as defined in claim 1 wherein said substrate material is gold.
Claim 8
Dependent Claim
13 words
The method as defined in claim 1 wherein said substrate material is nickel.
References Cited (Backward Citations)
US2649409A
Cited
US3615405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |