Patent US3036898A successfully refreshed from Google Patents.
US3036898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor zone refining and crystal growth
Assignee: International Business Machines Corp
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Filing: 1959-04-30
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Granted: 1962-05-29
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Expires: 1979-04-30
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey E Brock
- 👤 Edward S Wajda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:49
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/16; C30B13/22; C30B13/24; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1076; Y10T117/108; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A ZONE REFINING PROCESS FOR PRODUCING SINGLE CRYSTAL MATERIAL WHICH COMPRISES DISPOSING A QUANTITY OF SEMICONDUCTOR MATERIAL INCLUDING A SEED CRYSTAL IN A CONTAINER, MOVING SAID CONTAINER PAST A PLURALITY OF INDUCTIVE HEATING STAGES SO AS TO CREATE IN SAID QUANTITY OF SEMICONDUCTOR MATERIAL A SUCCESSION OF DISCRETELY SPACED MOLTEN ZONES SEPARATED BY SOLIDIFIED PORTIONS OF THE MATERIAL, SAID CONTAINER COMPRISING TWO SECTIONS, AN INNER NON-INDUCTIVE SECTION IN WHICH SAID QUANTITY OF SEMICONDUCTOR MATERIAL IS DISPOSED AND AN OUTER INDUCTIVE SECTION ENGAGABLE WITH SAID INNER SECTION AND SURROUNDING ALL OF SAID QUANTITY OF SEMICONDUCTOR MATERIAL EXCEPT SAID SEED CRYSTAL WHEREBY WHEN SAID CONTAINER IS MOVED PAST SAID PLURALITY OF INDUCTIVE HEATING STAGES HEAT IS COUPLED ONLY TO THE QUANTITY OF SEMICONDUCTOR MATERIAL OTHER THAN SAID SEED CRYSTAL.
Claim 2
Dependent Claim
127 words
A ZONE REFINING PROCESS FOR PRODUCING SINGLE CRYSTAL MATERIAL WHICH COMPRISES DISPOSING A QUANTITY OF SEMICONDUCTOR MATERIAL INCLUDING A SEED CRYSTAL IN A CONTAINER, MOVING SAID CONTAINER PAST A PLURALITY OF INDUCTIVE HEATING STAGES SO AS TO CREATE IN SAID QUANTITY OF SEMICONDUCTOR MATERIAL A SUCCESSION OF DISCRETELY SPACED MOLTEN ZONES SEPARATED BY SOLIDIFIED PORTIONS OF THE MATERIAL, SAID CONTAINER COMPRISING TWO SECTIONS, AN INNER NON-INDUCTIVE SECTION IN WHICH SAID QUANTITY OF SEMICONDUCTOR MATERIAL IS DISPOSED AND AN OUTER INDUCTIVE SECTION ENGAGABLE WITH SAID INNER SECTION AND SURROUNDING ALL OF SAID QUANTITY OF SEMICONDUCTOR MATERIAL EXCEPT SAID SEED CRYSTAL WHEREBY WHEN SAID CONTAINER IS MOVED PAST SAID PLURALITY OF INDUCTIVE HEATING STAGES HEAT IS COUPLED ONLY TO THE QUANTITY OF SEMICONDUCTOR MATERIAL OTHER THAN SAID SEED CRYSTAL.
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) | 1965-05-28 | 1965-11-27 | 1966-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-28 | 1969-11-27 | 1970-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-28 | 1973-11-27 | 1974-05-29 | $7700.00 | Window Closed / Lapsed |