US3706015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor with multilayer contact
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1971-03-02
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Granted: 1972-12-12
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Expires: 1991-03-02
Abstract
Abstract A SEMICONDUCTOR HAVING A CONTACT COMPOSED OF A LAYER LOCATED IMMEDIATELY ON THE SEMICONDUCTOR AND MADE FO THE COMBINATION OF AN ADHERENT METAL AND A LOW CONTACTRESISTANCE METAL, A LAYER SITUATED ON THE COMBINATION LAYER AND BEING SUBSTANTIALLY SOLDER-INSOLUBLE AND WETTABLE, A SECOND WETTABLE LAYER SITUATED ON THE SOLDER-INSOLUBLE AND WETTABLE ALYER, AND AT LEAST ONE ETCHANT-RESISTANT LAYER SITUATED ON THE SECOND WETTABLE LAYER.
Inventors
- 👤 Rigobert Schimmer
- 👤 Horst Gesing
- 👤 Karl-Heinz Cordes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
H; H10; H10P; H10P95/00; H10P14/00; H10P14/40; H10P14/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |