Patent US3793070A successfully refreshed from Google Patents.
US3793070A
Expired / Lapsed
US
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Method of varying the carrier concentration of lead-tin sulfide epitaxial films
Assignee: United States Department of the Navy
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Filing: 1971-06-01
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Granted: 1974-02-19
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Expires: 1991-06-01
Abstract
Abstract A method of varying the carrier concentration of epitaxial films of Pbx Sn1 xS, wherein X varies from 0.8 to 1 inclusive, which are deposited in vacuum from a source of material in a sublimation furnace which is at a temperature above the sublimation temperature of the material comprising varying the sublimation furnace opening size and temperature. The products can be used as infrared detectors.
Inventors
- 👤 R Schoolar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:58
CPC Classifications
H; H10; H10P; H10P95/00; H10F; H10F71/00; Y; Y10; Y10S; Y10S148/00; Y10S148/049; Y10S148/063; Y10S148/064; Y10S148/085; Y10S438/00; Y10S438/914; Y10S438/925; Y10S438/936; Y10S438/971
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
21 words
The method of claim 1 wherein the material being sublimed is sublimed from a sublimation furnace which has a vapor outlet.
Claim 2
Dependent Claim
42 words
The method of claim 2 wherein the diameter of the vapor path is increased as the temperature of the material being sublimed decreased and the diameter of the vapor path is decreased as the temperature of the material being sublimed is increased.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein the material to be sublimed is an n-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 4
Dependent Claim
32 words
The process of claim 2 wherein the material to be sublimed is an n-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 5
Dependent Claim
32 words
The process of claim 3 wherein the material to be sublimed is an n-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 6
Dependent Claim
32 words
The process of claim 1 wherein the material to be sublimed is a p-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 7
Dependent Claim
32 words
The process of claim 2 wherein the material to be sublimed is a p-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 8
Dependent Claim
32 words
The process of claim 3 wherein the material to be sublimed is a p-type material and the epitaxial film is made more p-type by raising the temperature of the material being sublimed.
Claim 9
Dependent Claim
32 words
The process of claim 1 wherein the material to be sublimed is an n-type material and the epitaxial film is made more n-type by lowering the temperature of the material being sublimed.
Claim 10
Dependent Claim
32 words
The process of claim 2 wherein the material to be sublimed is an n-type material and the epitaxial film is made more n-type by lowering the temperature of the material being sublimed.
Claim 11
Dependent Claim
32 words
The process of claim 3 wherein the material to be sublimed is an n-type material and the epitaxial film is made more n-type by lowering the temperature of the material being sublimed.
Claim 12
Dependent Claim
32 words
The process of claim 1 wherein the material to be sublimed is a p-type material and the epitaxial film is made less p-type by lowering the temperature of the material being sublimed.
Claim 13
Dependent Claim
32 words
The process of claim 2 wherein the material to be sublimed is a p-type material and the epitaxial film is made less p-type by lowering the temperature of the material being sublimed.
Claim 14
Dependent Claim
32 words
The process of claim 3 wherein the material to be sublimed is a p-type material and the epitaxial film is made less p-type by lowering the temperature of the material being sublimed.
References Cited (Backward Citations)
US3520741A
Cited
US3642529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |