US3796548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boat structure in an apparatus for making semiconductor compound single crystals
Assignee: International Business Machines Corp
•
Filing: 1971-09-13
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Granted: 1974-03-12
•
Expires: 1991-09-13
Abstract
Abstract An apparatus useful for growing single crystal semiconductor material comprising a liquid melt section coaxially integrated with a seed cavity and having an annularly disposed integral thermal reflector means and a radiant heat dissipating member horizontally disposed and in a post linear direction from the seed cavity.
Inventors
- 👤 D Boss
- 👤 E Hull
- 👤 S Scilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/14; C30B11/003; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
An apparatus in accordance with claim 1 wherein said apparatus is construCted of fused silica.
Claim 2
Dependent Claim
25 words
An apparatus in accordance with claim 1 wherein the apparatus is constructed of fused silica and having roughened surfaces except said radiant heat dissipating member.
References Cited (Backward Citations)
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US3156533A
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US3210165A
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US3198606A
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US3240568A
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US3401022A
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US3453352A
Cited
US3464812A
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US3520810A
Cited
US3617223A
Cited
US3607054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |