US3231436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating semiconductor devices to stabilize current amplification factor characteristic
Assignee: NEC Corp
•
Filing: 1962-03-07
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Granted: 1966-01-25
•
Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Shiraishi Masamichi
- 👤 Takashima Masaki
- 👤 Kawaji Akira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:42
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A METHOD OF THERMALLY AGING INDIUM-GERMANIUM ALLOY TYPE SEMICONDUCTOR DEVICES COMPRISING THE STEPS OF ENCAPSULATING SAID ALLOY TYPE SEMICONDUCTOR DEVICE, SAID ALLOY BEING FORMED OF AN INDIUM STRIP ON A STRIP OF GERMANIUM, HEATING SAID ENCAPSULATED DEVICE TO A TEMPERATURE OF AP PROXIMATELY 450*C. FOR A LENGTH OF TIME SUFFICIENT TO STABILIZE THE CURRENT AMPLIFICATION FACTOR CHARACTERIC OF SAID DEVICE, AND COOLING SAID DEVICE BACK TO ITS NORMAL TEMPERATURE WHEREBY SUBSTANTIALLY IMPROVED THERMAL AGING OF SAID DEVICE IS ACHIEVED.
Claim 2
Independent Claim
79 words
A METHOD OF THERMALLY AGING INDIUM-GERMANIUM ALLOY TYPE SEMICONDUCTOR DEVICES COMPRISING THE STEPS OF ENCAPSULATING SAID ALLOY TYPE SEMICONDUCTOR DEVICE, SAID ALLOY BEING FORMED OF AN INDIUM STRIP ON A STRIP OF GERMANIUM, HEATING SAID ENCAPSULATED DEVICE TO A TEMPERATURE OF AP PROXIMATELY 450*C. FOR A LENGTH OF TIME SUFFICIENT TO STABILIZE THE CURRENT AMPLIFICATION FACTOR CHARACTERIC OF SAID DEVICE, AND COOLING SAID DEVICE BACK TO ITS NORMAL TEMPERATURE WHEREBY SUBSTANTIALLY IMPROVED THERMAL AGING OF SAID DEVICE IS ACHIEVED.
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |