US3331997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon diode with solder composition attaching ohmic contacts
Assignee: Studebaker Worthington Inc
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Filing: 1964-12-31
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Granted: 1967-07-18
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Harry C Kling
- 👤 Koslosky Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:28
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50; H10D; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, AN END CONTACT MEMBER OF COPPER, A WAFER OF SILICON HAVING ONE SURFACE CONFORMING TO A SURFACE OF THE END CONTACT MEMBER, THE TWO SURFACES BEING ADJACENT TO EACH OTHER, AND A SOLDER DISPOSED BETWEEN AND BONDING THE SILICON WAFER TO THE END CONTACT MEMBER, THE SOLDER COMPRISING A LEAD ALLOY COMPOSED OF 97 TO 98 PARTS BY WEIGHT OF LEAD, 1 TO 2 PARTS OF SILVER, AND FROM 0.5 TO 1.5 PART OF TIN.
Claim 2
Dependent Claim
81 words
IN A SEMICONDUCTOR DEVICE, IN COMBINATION, AN END CONTACT MEMBER OF COPPER, A WAFER OF SILICON HAVING ONE SURFACE CONFORMING TO A SURFACE OF THE END CONTACT MEMBER, THE TWO SURFACES BEING ADJACENT TO EACH OTHER, AND A SOLDER DISPOSED BETWEEN AND BONDING THE SILICON WAFER TO THE END CONTACT MEMBER, THE SOLDER COMPRISING A LEAD ALLOY COMPOSED OF 97 TO 98 PARTS BY WEIGHT OF LEAD, 1 TO 2 PARTS OF SILVER, AND FROM 0.5 TO 1.5 PART OF TIN.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |