Patent US2442831A successfully refreshed from Google Patents.
Patent US4842973A successfully refreshed from Google Patents.
US4842973A
Expired / Lapsed
US
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Vacuum deposition of selenium alloy
Assignee: Xerox Corp
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Filing: 1988-04-08
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Granted: 1989-06-27
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Expires: 2008-04-08
Abstract
Abstract A process for fabricating an electrophotographic imaging member is disclosed comprising providing in a vacuum chamber at least one crucible containing particles of an alloy comprising selenium and an alloying component selected from the group consisting of tellurium, arsenic, and mixtures thereof, providing a substrate in the vacuum chamber, applying a partial vacuum to the vacuum chamber, and rapidly heating the crucible to a temperature between about 250° C. and 450° C. to deposit a thin continuous selenium alloy layer on the substrate. A plurality of selenium containing layers may be formed by providing in a vacuum chamber at least one first layer crucible containing particles of selenium or a sellenium alloy, at least one second layer crucible containing particles of an alloy comprising selenium, and a substrate, applying a partial vacuum to the vacuum chamber, heating the particles in the first layer crucible to deposit a thin continuous selenium or a selenium alloy first layer on the substrate, maintaining the particles in the second layer crucible at a first temperature below about 130° C. while the thin continuous selenium or a selenium alloy first layer is being deposited on the substrate, and rapidly heating the particles in the second layer crucible to a second temperature between about 250° C. and about 450° C. to deposit a thin continuous selenium alloy second layer on the substrate.
Inventors
- 👤 Santokh S. Badesha
- 👤 Paul Cherin
- 👤 Geoffrey M. T. Foley
- 👤 Barry A. Lees
- 👤 John Wozniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:08
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0623; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08207
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
157 words
A process for fabricating an electrophotographic imaging member comprising providing in a vacuum chamber at least one first layer crucible containing particles of selenium or a selenium alloy, at least one second layer crucible containing particles of an alloy comprising selenium and an alloying component selected from the group consisting of tellurium, arsenic, and mixtures thereof, and a substrate, applying a partial vacuum to said vacuum chamber, heating said particles in said first layer crucible to deposit a thin continuous selenium or a selenium alloy first layer on said substrate, maintaining said particles in said second layer crucible at a first temperature below about 130° C. while said thin continuous selenium or a selenium alloy first layer is being deposited on said substrate, and rapidly heating the particles in said second layer crucible to a second temperature between about 250° C. and about 450° C. to deposit a thin continuous selenium alloy second layer on said substrate.
Claim 2
Dependent Claim
157 words
A process for fabricating an electrophotographic imaging member comprising providing in a vacuum chamber at least one first layer crucible containing particles of selenium or a selenium alloy, at least one second layer crucible containing particles of an alloy comprising selenium and an alloying component selected from the group consisting of tellurium, arsenic, and mixtures thereof, and a substrate, applying a partial vacuum to said vacuum chamber, heating said particles in said first layer crucible to deposit a thin continuous selenium or a selenium alloy first layer on said substrate, maintaining said particles in said second layer crucible at a first temperature below about 130° C. while said thin continuous selenium or a selenium alloy first layer is being deposited on said substrate, and rapidly heating the particles in said second layer crucible to a second temperature between about 250° C. and about 450° C. to deposit a thin continuous selenium alloy second layer on said substrate.
Claim 3
Dependent Claim
27 words
A process for fabricating an electrophotographic imaging member in accordance with claim 1 wherein said first layer is a charge transport layer of a selenium arsenic alloy.
Claim 4
Dependent Claim
22 words
A process for fabricating an electrophotographic imaging member in accordance with claim 1 wherein said second layer is a charge generator layer.
Claim 5
Dependent Claim
60 words
A process for fabricating an electrophotographic imaging member in accordance with claim 1 including rapidly raising the temperature of said second layer crucible to between about 300° C. and about 375° C. in between about 5 minutes and about 18 minutes at the completion of evaporation of said particles of selenium or a selenium alloy from said first layer crucible.
Claim 6
Dependent Claim
20 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 wherein said alloy comprises a halogen dopant.
Claim 7
Dependent Claim
23 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 wherein said alloy comprises an alloy of selenium and arsenic.
Claim 8
Dependent Claim
23 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 wherein said alloy comprises an alloy of selenium and tellurium.
Claim 9
Dependent Claim
24 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 wherein said alloy comprises an alloy of selenium, arsenic and tellurium.
Claim 10
Dependent Claim
48 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 wherein said heating of said particles to a temperature between about 85° C. and and about 130° C. is maintained until 100 percent of said amorphous core of selenium alloy in said particles is crystallized.
Claim 11
Dependent Claim
105 words
A process for preparing an electrophotographic imaging member in accordance with claim 4 comprising, prior to rapid heating said particles in a vacuum coater, preparing a mixture of said particles in which 100 percent of said amorphous core is crystallized and additional particles of an amorphous alloy comprising selenium and a dopant selected from the group consisting of tellurium, arsenic, and mixtures thereof, said additional particles having an average particle size of at least about 300 micrometers and an average weight of less than about 1000 mg, said additional particles comprising up to about 75 percent by weight of the total weight of said mixture.
Claim 12
Dependent Claim
38 words
A process for preparing an electrophotographic imaging member in accordance with claim 1 wherein said particles of an alloy comprising selenium and an alloying component selected from the group consisting of tellurium, arsenic, and mixtures thereof are beads.
Claim 13
Dependent Claim
38 words
A process for preparing an electrophotograhic imaging member in accordance with claim 1 wherein said particles of an alloy comprising selenium and an alloying component selected from the group consisting of tellurium, arsenic, and mixtures thereof are pellets.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |