USRE31473E
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for fabrication of semiconductor bodies
Assignee: Texas Instruments Inc
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Filing: 1982-03-02
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Granted: 1983-12-27
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Expires: 2002-03-02
Abstract
Abstract A system and method is provided for forming semiconductor tear-drop shaped bodies having minimal grain boundaries. Semiconductor material is melted in a capillary tube at the top of a tower, and forced under gas pressure through a nozzle. Separate semiconductor bodies are formed. They are passed through a free fall path over which a predetermined temperature gradient controls solidification of the bodies. The resultant bodies are tear-drop semiconductor bodies of near uniform size with minimal grain boundaries.
Inventors
- 👤 Jack S. Kilby
- 👤 William R. McKee
- 👤 Wilbur A. Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:09
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/02; C30B29/06; B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; C30B11/00; C30B29/08; C30B29/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
the top and hour-glass shape therebelow. 8. The combination set forth in claim 7, wherein said free fall path is of a length and the temperature is at levels therealong to slowly solidify said bodies. .[.9. The combination set forth in claim 6 said capillary tube has a gas port and the upper end of said tube has a gas conduit leading thereto for selective flow of inert gas into said capillary tube and said elongated tube..].
References Cited (Backward Citations)
US2038251A
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US2595780A
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FR1029940A
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US2911672A
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US2935386A
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US3123855A
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US3160686A
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US3666850A
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US3715418A
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US3753661A
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US3708560A
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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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |