Patent US2177217A successfully refreshed from Google Patents.
US2763822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon semiconductor devices
Assignee: Westinghouse Electric Corp
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Filing: 1955-05-10
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Granted: 1956-09-18
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Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Frank V Frola
- 👤 Milo W Slye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:01
CPC Classifications
H; H10; H10W; H10W99/00; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/262; B23K35/30; B23K35/3006; C; C25; C25D; C25D7/00; C25D7/12; C25D7/123; H10D; H10D99/00; H10P; H10P95/00; H10W40/00; H10W40/20; H10W40/22; Y; Y10; Y10S; Y10S165/00; Y10S165/905; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12493; Y10T428/12528; Y10T428/12674
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, A SEMICONDUCTING MEMBER COMPRISING SILICON, CONTACT MEMBER HAVING A SURFACE CLOSELY CONFORMING TO AND DISPOSED ADJACENT TO A SURFACE OF THE SEMICONDUCTING MEMBER, THE CONTACT MEMBER COMPOSED OF A METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION CORRESPONDING CLOSELY TO THAT OF SILICON, AND A FUSED LAYER DISPOSED BETWEEN AND BONDED TO SAID ADJACENT CONFORMING SURFACES, THE FUSED LAYER CONSISTING OF AN ALLOY OF SILVER AND AT LEAST ONE ELEMENT OF GROUP IV-B OF THE PERIODIC TABLE SELECTED FROM THE GROUP CONSISTING OF TIN, SILICON, GERMANIUM AND LEAD, THE ALLOY COMPOSED OF AT LEAST 5% SILVER, THE BALANCE NOT EXCEEDING 90% BY WEIGHT OF TIN, NOT EXCEEDING 20% BY WEIGHT OF SILICON, NOT EXCEEDING 50% BY WEIGHT OF GERMANIUM, NOT EXCEEDING 95% BY WEIGHT OF LEAD.
Claim 2
Dependent Claim
143 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, A SEMICONDUCTING MEMBER COMPRISING SILICON, CONTACT MEMBER HAVING A SURFACE CLOSELY CONFORMING TO AND DISPOSED ADJACENT TO A SURFACE OF THE SEMICONDUCTING MEMBER, THE CONTACT MEMBER COMPOSED OF A METAL SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION CORRESPONDING CLOSELY TO THAT OF SILICON, AND A FUSED LAYER DISPOSED BETWEEN AND BONDED TO SAID ADJACENT CONFORMING SURFACES, THE FUSED LAYER CONSISTING OF AN ALLOY OF SILVER AND AT LEAST ONE ELEMENT OF GROUP IV-B OF THE PERIODIC TABLE SELECTED FROM THE GROUP CONSISTING OF TIN, SILICON, GERMANIUM AND LEAD, THE ALLOY COMPOSED OF AT LEAST 5% SILVER, THE BALANCE NOT EXCEEDING 90% BY WEIGHT OF TIN, NOT EXCEEDING 20% BY WEIGHT OF SILICON, NOT EXCEEDING 50% BY WEIGHT OF GERMANIUM, NOT EXCEEDING 95% BY WEIGHT OF LEAD.
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |