US3082126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing diffused junctions in silicon carbide
Assignee: Westinghouse Electric Corp
•
Filing: 1959-06-19
•
Granted: 1963-03-19
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Chang Hung Chi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:06
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/17; H10P32/171; H10P32/172; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S148/148; Y10S252/00; Y10S252/95; Y10S252/951; Y10S438/00; Y10S438/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF PROVIDING A SILICON CARBIDE SINGLE CRYSTAL WITH A CONDUCTIVITY IMPURITY DIFFUSED THEREIN THAT COMPRISES SUBJECTING THE SURFACE OF A SILICON CARBIDE SINGLE CRYSTAL OF PREDETERMINED SHAPE TO CONTACT WITH A CONDUCTIVITY IMPURITY UNDER CONDITIONS OF TEMPERATURE OF AT LEAST ABOUT 1400*C. AND A DOPING IMPURITY CONCENTRATION FOR A PERIOD OF TIME TO CAUSE DIFFUSION OF SAID IMPURITY INTO A SUBSTANTIAL DEPTH INTO SAID CRYSTAL WHILE MAINTAINING THE SURFACE OF SAID CRYSTAL OUT OF CONTACT WITH ANY MOLTEN MATERIAL BUT IN THE PRESENCE OF A MATERIAL CAPABLE OF SUPPRESSING DECOMPOSITION OF SAID CRYSTAL WHEREBY TO MAINTAIN SAID PREDETERMINED SHAPE.
Claim 2
Independent Claim
101 words
A METHOD OF PROVIDING A SILICON CARBIDE SINGLE CRYSTAL WITH A CONDUCTIVITY IMPURITY DIFFUSED THEREIN THAT COMPRISES SUBJECTING THE SURFACE OF A SILICON CARBIDE SINGLE CRYSTAL OF PREDETERMINED SHAPE TO CONTACT WITH A CONDUCTIVITY IMPURITY UNDER CONDITIONS OF TEMPERATURE OF AT LEAST ABOUT 1400*C. AND A DOPING IMPURITY CONCENTRATION FOR A PERIOD OF TIME TO CAUSE DIFFUSION OF SAID IMPURITY INTO A SUBSTANTIAL DEPTH INTO SAID CRYSTAL WHILE MAINTAINING THE SURFACE OF SAID CRYSTAL OUT OF CONTACT WITH ANY MOLTEN MATERIAL BUT IN THE PRESENCE OF A MATERIAL CAPABLE OF SUPPRESSING DECOMPOSITION OF SAID CRYSTAL WHEREBY TO MAINTAIN SAID PREDETERMINED SHAPE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |