US3290181A
Expired / Lapsed
US
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Method of producing pure semiconductor material by chemical transport reaction using h2s/h2 system
Assignee: Siemens and Halske AG
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Filing: 1964-07-30
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Granted: 1966-12-06
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Expires: 1984-07-30
Abstract
No abstract record available.
Inventors
- 👤 Sirtl Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:29
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01G; C01G1/00; C01G1/12; C22; C22C; C22C1/00; C22C1/007; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/052; Y10S148/135; Y10S438/00; Y10S438/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN THE METHOD FOR PRODUCING PURE SEMICONDUCTOR MATERIAL IN CRYSTALLINE FORM BY MEANS OF CHEMICAL TRANSPORT REACTIONS IN WHICH SOLID SEMICONDUCTOR MATERIAL IS CONVERTED BY HEATING INTO A GASEOUS COMPOUND THEREOF AND BY UTILIZATION OF A TEMPERATURE GRADIENT IS DISSOCIATED TO PRECIPITATE SEMICONDUCTOR MATERIAL AT A DIFFERENT LOCATION, THE IMPROVEMENT WHICH COMPRISES USING THE SYSTEM H2S/H2 AS THE TRANSPORTING MEDIUM AND ADJUSTING THE REACTION CONDITIONS SO THAT THE TRANSPORT TAKES PLACE VIA A VOLATILE SULFIDE, OF THE SEMICONDUCTOR MATERIAL.
Claim 2
Dependent Claim
79 words
IN THE METHOD FOR PRODUCING PURE SEMICONDUCTOR MATERIAL IN CRYSTALLINE FORM BY MEANS OF CHEMICAL TRANSPORT REACTIONS IN WHICH SOLID SEMICONDUCTOR MATERIAL IS CONVERTED BY HEATING INTO A GASEOUS COMPOUND THEREOF AND BY UTILIZATION OF A TEMPERATURE GRADIENT IS DISSOCIATED TO PRECIPITATE SEMICONDUCTOR MATERIAL AT A DIFFERENT LOCATION, THE IMPROVEMENT WHICH COMPRISES USING THE SYSTEM H2S/H2 AS THE TRANSPORTING MEDIUM AND ADJUSTING THE REACTION CONDITIONS SO THAT THE TRANSPORT TAKES PLACE VIA A VOLATILE SULFIDE, OF THE SEMICONDUCTOR MATERIAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |