US3743538A
Expired / Lapsed
US
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Method of attaching an electrode to a semiconductor element
Assignee: Danfoss AS
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Filing: 1970-09-16
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Granted: 1973-07-03
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Expires: 1990-09-16
Abstract
Abstract A METHOD OF ATTACHING AN ELECTRODE TO A SEMICONDUCTOR ELEMENT COMPRISING THE STEPS OF APPLYING A CONTACT MIXTURE TO THE SEMICONDUCTOR ELEMENT AND FUSING THE MIXTURE TO THE ELEMENT. THE CONTACT MATERIAL COMPRISES SILVER, TITANIUM HYDRIDE AND A READILY OXIDIZABLE METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, ALUMINUM, LEAD, TIN AND INDIUM. THE FUSION TEMPERATURE IS ABOVE THE TEMPERATURE AT WHICH THE HYDRIDE REDUCES THE OXIDE OF THE OXIDIZABLE METAL.
Inventors
- 👤 H Mungaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/28; H01B; H01B1/00; H01B1/06; H01B1/08
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |