US2937323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused junctions in silicon carbide
Assignee: Westinghouse Electric Corp
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Filing: 1958-05-29
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Granted: 1960-05-17
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Kroko
- 👤 Chang Hung Chi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:30
CPC Classifications
H; H10; H10D; H10D8/00; H10D8/01; H10D8/051; H10D62/00; H10D62/80; H10D62/83; H10D62/832; H10D62/8325; H10D64/00; H10D64/01; H10D64/011; H10D64/0111; H10D64/0115; H10P; H10P32/00; H10P32/10; H10P32/17; H10P32/171; H10P32/172; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S148/148; Y10S438/00; Y10S438/931
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
A SEMICONDUCTOR DEVICE COMPRISING A SINGLE CRYSTAL OF SILICON CARBIDE HAVING P-TYPE CONDUCTIVITY WITHIN A PORTION THEREOF, A SURFACE AREA OF THE SILICON CARBIDE CRYSTAL ADJACENT TO AND IN CONTACT WITH THE P-TYPE PORTION BEING DOPED WITH IRON TO PROVIDE N-TYPE CONDUCTIVITY AT THE SAID SURFACE AREA WHEREBY TO PROVIDE A P-N JUNCTION, AND AN OHMIC CONTACT WITH THE IRON DOPED N-TYPE SURFACE AREA COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TANTALUM, TUNGSTEN, NICKEL AND SILICON.
References Cited (Backward Citations)
US2831787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |