US3694166A
Expired / Lapsed
US
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Crystal growth tube
Assignee: Raytheon Co
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Filing: 1969-11-20
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Granted: 1972-09-26
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Expires: 1989-11-20
Abstract
Abstract A METHOD OF SIMULTANEOUS PURIFICATION AND GROWTH OF SEMICONDUCTOR MATERIAL INTO A SINGLE STOICHIOMETRICALLY PURE CRYSTAL BY SUBLIMATION AND CONDENSATION OF THE MATERIAL. THE TUBE, WHICH IS USEFUL FOR CRYSTAL GROWTH FOR EXAMPLE BY EITHER A BRIDGMAN PROCESS OR BY A VAPOR GROWTH PROCESS, COMPRISES A SINGLE BODY HAVING A SMALL CONTAINER IS SECURED IN THE UPPER PART TO CONTAIN THE CHARGE AND A NUCLEATION POINT IN THE LOWER TUBE PART FOR GROWTH OF A SINGLE CRYSTAL.
Inventors
- 👤 Nanse R Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:49
CPC Classifications
C; C30; C30B; C30B23/00; C30B11/00; C30B11/002; C30B23/02; C30B29/00; C30B29/10; C30B29/46; C30B29/48; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/902; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1092
Claims Analysis
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |