US2957112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of tantalum semiconductor electrodes
Assignee: Westinghouse Electric Corp
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Filing: 1957-12-09
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Granted: 1960-10-18
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Sils Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/20; H10W70/24; B; B23; B23K; B23K35/00; B23K35/001; B23K35/005; C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; H10W99/00; B23K2035/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A JUNCTION TYPE SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTOR ELEMENT HAVING AT LEAST ONE ZONE OF A FIRST TYPE OF SEMICONDUCTIVITY AND AT LEAST ONE ZONE OF A SECOND TYPE SEMICONDUCTIVITY, METAL ELECTRODES, AND A SOLDER LAYER HAVING A LOWER MELTING POINT THAN THE METAL ELECTRODES JOINING THE METAL ELECTRODES TO THE ZONES OF THE SEMICONDUCTOR ELEMENT, AT LEAST ONE OF SAID METAL ELECTRODES BEING COMPRISED OF TANTALUM METAL COATED ONLY WITH A METAL SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF GOLD, SILVER, INDIUM AND TIN.
Claim 2
Dependent Claim
88 words
A JUNCTION TYPE SEMICONDUCTOR DEVICE COMPRISING A SEMICONDUCTOR ELEMENT HAVING AT LEAST ONE ZONE OF A FIRST TYPE OF SEMICONDUCTIVITY AND AT LEAST ONE ZONE OF A SECOND TYPE SEMICONDUCTIVITY, METAL ELECTRODES, AND A SOLDER LAYER HAVING A LOWER MELTING POINT THAN THE METAL ELECTRODES JOINING THE METAL ELECTRODES TO THE ZONES OF THE SEMICONDUCTOR ELEMENT, AT LEAST ONE OF SAID METAL ELECTRODES BEING COMPRISED OF TANTALUM METAL COATED ONLY WITH A METAL SELECTED FROM AT LEAST ONE OF THE GROUP CONSISTING OF GOLD, SILVER, INDIUM AND TIN.
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |