US3111433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for increasing the doping level of semiconductor materials
Assignee: AT&T Inc
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Filing: 1961-01-23
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Granted: 1963-11-19
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Logan
- 👤 William G Spitzer
- 👤 Forrest A Trumbore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:13
CPC Classifications
H; H10; H10P; H10P95/00; C; C30; C30B; C30B17/00; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD FOR PREPARING A HIGHLY DOPED ARSENICGERMANIUM CRYSTAL FROM A CRYSTAL HAVING A MAXIMUM CARRIER CONCENTRATION WITHIN THE RANGE OF 3-5X10**19 ATOMS CM.-3 WHICH COMPRISES THE STEPS OF HEATING THE SAID CRYSTAL AT A TEMPERATURE WITHIN THE RANGE OF 800900*C. FOR A TIME KPERIOD WITHIN THE RANGE OF 1-60 MINUTES AND QUENCHING THE SAID CRYSTAL TO A TEMPERATURE OF THE ORDER OF 500*C. IN A TIME PERIOD WITHIN THE RANGE OF 1-5 SECONDS, AND PERMITTING THE CRYSTAL TO COOL TO ROOM TEMPERATURE.
Claim 2
Independent Claim
83 words
A METHOD FOR PREPARING A HIGHLY DOPED ARSENICGERMANIUM CRYSTAL FROM A CRYSTAL HAVING A MAXIMUM CARRIER CONCENTRATION WITHIN THE RANGE OF 3-5X10**19 ATOMS CM.-3 WHICH COMPRISES THE STEPS OF HEATING THE SAID CRYSTAL AT A TEMPERATURE WITHIN THE RANGE OF 800900*C. FOR A TIME KPERIOD WITHIN THE RANGE OF 1-60 MINUTES AND QUENCHING THE SAID CRYSTAL TO A TEMPERATURE OF THE ORDER OF 500*C. IN A TIME PERIOD WITHIN THE RANGE OF 1-5 SECONDS, AND PERMITTING THE CRYSTAL TO COOL TO ROOM TEMPERATURE.
References Cited (Backward Citations)
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Cited
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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) | 1966-11-18 | 1967-05-20 | 1967-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-18 | 1971-05-20 | 1971-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-18 | 1975-05-20 | 1975-11-19 | $7700.00 | Window Closed / Lapsed |