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US2876147A
Expired / Lapsed
US
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Method of and apparatus for producing semiconductor material
Assignee: Siemens and Halske AG
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Filing: 1956-05-21
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Granted: 1959-03-03
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Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 Kniepkamp Heinrich
- 👤 Ziegler Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/28; C30B13/16; C30B13/26; C30B13/32; C30B15/00; C30B15/002; C30B15/02; C30B15/30; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/91; Y10S117/917; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1036; Y10T117/1076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PRODUCING ELONGATED GENERALLY RODSHAPED SEMI-CONDUCTOR CRYSTAL BODIES, COMPRISING DRAWING A CRYSTAL BODY FROM A MELT CONTAINED IN A CRUCIBLE WHILE SUPPORTING SAID DRAWN CRYSTAL BODY AT ITS ENDS, ONE END OF SAID CRYSTAL BODY BEING IN OPERATIVE CONTACT RELATION WITH THE MELT WHILE SUBJECTING SAID ONE END TO HEATING, SUBJECTING AN INTERMEDIATE AREA OF SAID CRYSTAL BODY IMMEDIATELY UPON CONCLUSION OF THE DRAWING THEREOF TO ZONE MELTING, AND MOVING RELATIVE TO SAID CRUCIBLE THE CONSEQUENTLY PRODUCED MELTING ZONE ALONG THE SOLIDFIED PORTION OF THE DRAWN CRYSTAL, EFFECTING PURIFICATION AND CAUSING DEPOSIT OF CONTAMINATIONS AT THE END OF SAID CRYSTAL BODY IN CONTACT WITH THE MELT.
Claim 2
Independent Claim
108 words
A METHOD OF PRODUCING ELONGATED GENERALLY RODSHAPED SEMI-CONDUCTOR CRYSTAL BODIES, COMPRISING DRAWING A CRYSTAL BODY FROM A MELT CONTAINED IN A CRUCIBLE WHILE SUPPORTING SAID DRAWN CRYSTAL BODY AT ITS ENDS, ONE END OF SAID CRYSTAL BODY BEING IN OPERATIVE CONTACT RELATION WITH THE MELT WHILE SUBJECTING SAID ONE END TO HEATING, SUBJECTING AN INTERMEDIATE AREA OF SAID CRYSTAL BODY IMMEDIATELY UPON CONCLUSION OF THE DRAWING THEREOF TO ZONE MELTING, AND MOVING RELATIVE TO SAID CRUCIBLE THE CONSEQUENTLY PRODUCED MELTING ZONE ALONG THE SOLIDFIED PORTION OF THE DRAWN CRYSTAL, EFFECTING PURIFICATION AND CAUSING DEPOSIT OF CONTAMINATIONS AT THE END OF SAID CRYSTAL BODY IN CONTACT WITH THE MELT.
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |