US3002824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the manufacture of crystalline semiconductors
Assignee: US Philips Corp
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Filing: 1957-11-18
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Granted: 1961-10-03
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Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Francois Marcel Pieter Alfons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/14; C30B13/00; C30B13/16; C30B13/20; C30B15/10; C30B15/12; C30B15/20; C30B15/22; C30B15/24; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1036; Y10T117/1068; Y10T117/1076; Y10T117/108; Y10T117/1084; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD FOR GROWING A SINGLE CRYSTAL IN THE FORM OF A SUBSTANTIALLY CYLINDRICAL ROD FROM A SEMICONDUCTIVE MELT, COMPRISING PROVIDING IN CONTACT WITH THE MELT AN APERTURED ANNULAR MEMBER WHOSE INNER DIAMETER IS ONLY SLIGHTLY GREATER THAN THE ROD DIAMETER TO BE GROWN AND WHOSE OUTER DIAMETER IS AT LEAST TWICE AND SAID ROD DIAMETER AND HAVING A HIGH RADIATION COEFFICIENT, CONTACTING THE MELT THROUGH THE APERTURE IN THE ANNULAR MEMBER WITH A SINGLE CRYSTAL, DRAWING THE SINGLE CRYSTAL UPWARDS THROUGH THE APERTURED ANNULAR MEMBER SO THAT THE GROWN ROD JUST FILLS THE APERTURE, AND MAINTAINING SAID ANNULAR MEMBER AT A TEMPERATURE AT LEAST EQUAL TO THAT OF THE MELT THEREBY RADIATING HEAT TO THE JUST-GROWN ROD PORTION CONTIGUOUS WITH THE MOLTEN ZONE, THEREBY TO IMPROVE THE QUALITY OF THE RESULTANT SINGLE CRYSTAL.
Claim 2
Independent Claim
134 words
A METHOD FOR GROWING A SINGLE CRYSTAL IN THE FORM OF A SUBSTANTIALLY CYLINDRICAL ROD FROM A SEMICONDUCTIVE MELT, COMPRISING PROVIDING IN CONTACT WITH THE MELT AN APERTURED ANNULAR MEMBER WHOSE INNER DIAMETER IS ONLY SLIGHTLY GREATER THAN THE ROD DIAMETER TO BE GROWN AND WHOSE OUTER DIAMETER IS AT LEAST TWICE AND SAID ROD DIAMETER AND HAVING A HIGH RADIATION COEFFICIENT, CONTACTING THE MELT THROUGH THE APERTURE IN THE ANNULAR MEMBER WITH A SINGLE CRYSTAL, DRAWING THE SINGLE CRYSTAL UPWARDS THROUGH THE APERTURED ANNULAR MEMBER SO THAT THE GROWN ROD JUST FILLS THE APERTURE, AND MAINTAINING SAID ANNULAR MEMBER AT A TEMPERATURE AT LEAST EQUAL TO THAT OF THE MELT THEREBY RADIATING HEAT TO THE JUST-GROWN ROD PORTION CONTIGUOUS WITH THE MOLTEN ZONE, THEREBY TO IMPROVE THE QUALITY OF THE RESULTANT SINGLE CRYSTAL.
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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) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |