US3961953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating composite trigonal selenium photoreceptor
Assignee: Xerox Corp
•
Filing: 1974-05-28
•
Granted: 1976-06-08
•
Expires: 1994-05-28
Abstract
Abstract A method of making a photosensitive imaging device which comprises; vacuum evaporating a thin layer of vitreous selenium onto a supporting substrate, forming a relatively thicker layer of electrically active organic material over said selenium layer, followed by heating said device to an elevated temperature for a time sufficient to convert the vitreous selenium to the crystalline trigonal form. The imaging device is also disclosed.
Inventors
- 👤 Richard P. Millonzi
- 👤 Richard W. Radler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0436; G03G5/08; G03G5/082; G03G5/08207
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A method of making a photosensitive imaging device which comprises: vacuum depositing a 0.03 to 0.8 micron thick layer of vitreous selenium onto a supporting substrate, forming a relatively thicker layer of a substantially transparent electrically organic material over said selenium layer and heating said device to a temperature of from 125° to 210° C for a time of from 1 to 24 hours to convert the vitreous selenium to the crystalline trigonal form.
Claim 2
Independent Claim
74 words
A method of making a photosensitive imaging device which comprises: vacuum depositing a 0.03 to 0.8 micron thick layer of vitreous selenium onto a supporting substrate, forming a relatively thicker layer of a substantially transparent electrically organic material over said selenium layer and heating said device to a temperature of from 125° to 210° C for a time of from 1 to 24 hours to convert the vitreous selenium to the crystalline trigonal form.
Claim 3
Dependent Claim
28 words
The method of claim 1 in which the electrically active layer comprises a material selected from the group consisting of polyvinyl carbazole, polyvinyl pyrene, 2,4,7-trinitro-9-fluorenone, and mixtures thereof.
Claim 4
Dependent Claim
35 words
An imaging device which comprises a supporting substrate, a layer of trigonal selenium about 0.03 to 0.8 microns thick overlaying the substrate and a layer of electrically active organic material overlaying said trigonal selenium layer.
Claim 5
Dependent Claim
35 words
An imaging device which comprises a supporting substrate, a layer of trigonal selenium about 0.03 to 0.8 microns thick overlaying the substrate and a layer of electrically active organic material overlaying said trigonal selenium layer.
Claim 6
Dependent Claim
28 words
The device of claim 3 in which the electrically active layer comprises a material selected from the group consisting of polyvinyl carbazole, polyvinyl pyrene, 2,4,7-trinitro-9-fluorenone, and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |