US3305486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor material and method of making the same
Assignee: General Electric Co
•
Filing: 1964-01-31
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Granted: 1967-02-21
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Jerome S Prener
- 👤 Jack D Kingsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:52
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; C; C30; C30B; C30B11/00; C30B29/00; C30B29/10; C30B29/12; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A SEMICONDUCTOR MATERIAL COMPRISING A SINGLE CRYSTAL OF CADMIUM FLUORIDE CONTAINING YTTRIUM AS A CONDUCTIVITY-PROVIDING ELEMENT, SAID YTTRIUM BEING PRESENT IN AN AMOUNT RANGING FORM A SMALL BUT FINITE QUANTITY UP TO A MAXIMUM OF APPROXIMATELY 10 MOLE PERCENT.
Claim 2
Dependent Claim
39 words
A SEMICONDUCTOR MATERIAL COMPRISING A SINGLE CRYSTAL OF CADMIUM FLUORIDE CONTAINING YTTRIUM AS A CONDUCTIVITY-PROVIDING ELEMENT, SAID YTTRIUM BEING PRESENT IN AN AMOUNT RANGING FORM A SMALL BUT FINITE QUANTITY UP TO A MAXIMUM OF APPROXIMATELY 10 MOLE PERCENT.
Claim 3
Independent Claim
69 words
A METHOD OF PREPARING A CRYSTALL OF CADMIUM FLUORIDE IMPREGNATED WITH YTTRIUM AHD HAVING SEMICONDUCTIVE PROPERTIES COMPRISNG: MELTING AND RECRYSTALLIZING A MIXTURE OF CADMIUM FLUROIDE AND YTTRIUM FLURODE; PROVIDING A QUANTITY OF CADMIUM SUFFICIENT TO GENERATE A SATURATED ATMOSPHERE OF CADMIUM METAL VAPOR; AND HEATING SAID CRYSTAL AND SAID METAL TO A TEMPERATURE APPROXIMATELY IN THE RANGE OF 300*C. TO 1000*C. UNTIL SAID CRYSTAL IS EQUILIBRATED WITH SAID VAPOR.
Claim 4
Independent Claim
69 words
A METHOD OF PREPARING A CRYSTALL OF CADMIUM FLUORIDE IMPREGNATED WITH YTTRIUM AHD HAVING SEMICONDUCTIVE PROPERTIES COMPRISNG: MELTING AND RECRYSTALLIZING A MIXTURE OF CADMIUM FLUROIDE AND YTTRIUM FLURODE; PROVIDING A QUANTITY OF CADMIUM SUFFICIENT TO GENERATE A SATURATED ATMOSPHERE OF CADMIUM METAL VAPOR; AND HEATING SAID CRYSTAL AND SAID METAL TO A TEMPERATURE APPROXIMATELY IN THE RANGE OF 300*C. TO 1000*C. UNTIL SAID CRYSTAL IS EQUILIBRATED WITH SAID VAPOR.
References Cited (Backward Citations)
US3033791A
Cited
US3250722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |