US2922092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base contact members for semiconductor devices
Assignee: Westinghouse Electric Corp
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Filing: 1957-05-09
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Granted: 1960-01-19
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Expires: 1977-05-09
Abstract
No abstract record available.
Inventors
- 👤 Charles P Gazzara
- 👤 David L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:38
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K35/0222; B23K35/0244; B23K35/025; B23K35/0255; B23K35/22; B23K35/24; B23K35/28; B23K35/286; B23K35/30; B23K35/3006; H10D; H10D99/00; H10P; H10P95/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; H10W72/351; H10W72/352; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528; Y10T428/12674; Y10T428/12771; Y10T428/12806; Y10T428/12861; Y10T428/12875; Y10T428/12896
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A SEMICONDUCTOR DEVICE, A BASE CONTACT MEMBER ADAPTED TO BE SOLDERED TO A BASE MOUNT AND HAVING A WAFER OF SILICON BONDED TO A SURFACE OTHER THAN THE SURFACE TO BE SOLDERED TO THE BASE MOUNT, THE BASE CONTACT MEMBER COMPRISING A BODY OF A METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION APPROACHING THAT OF SILICON, AND A RELATIVELY THIN BONDED COATING OF A THICKNESS OF THE ORDER OF FROM 1 MIL TO 0.01 MIL OF A METAL SELECTED FROM THE GROUP CONSISTING OF GOLD, PLATINUM AND RHODIUM APPLIED TO AT LEAST THAT SURFACE OF SAID BASE CONTACT MEMBER TO BE APPLIED TO THE BASE MOUNT, SAID COATING BEING APPLIED TO THE BASE CONTACT MEMBER IN ORDER TO ENABLE SATISFACTORY SOLDERING TO BE EFFECTED THERETO.
Claim 2
Dependent Claim
138 words
IN A SEMICONDUCTOR DEVICE, A BASE CONTACT MEMBER ADAPTED TO BE SOLDERED TO A BASE MOUNT AND HAVING A WAFER OF SILICON BONDED TO A SURFACE OTHER THAN THE SURFACE TO BE SOLDERED TO THE BASE MOUNT, THE BASE CONTACT MEMBER COMPRISING A BODY OF A METAL SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN, TANTALUM AND BASE ALLOYS THEREOF HAVING A COEFFICIENT OF THERMAL EXPANSION APPROACHING THAT OF SILICON, AND A RELATIVELY THIN BONDED COATING OF A THICKNESS OF THE ORDER OF FROM 1 MIL TO 0.01 MIL OF A METAL SELECTED FROM THE GROUP CONSISTING OF GOLD, PLATINUM AND RHODIUM APPLIED TO AT LEAST THAT SURFACE OF SAID BASE CONTACT MEMBER TO BE APPLIED TO THE BASE MOUNT, SAID COATING BEING APPLIED TO THE BASE CONTACT MEMBER IN ORDER TO ENABLE SATISFACTORY SOLDERING TO BE EFFECTED THERETO.
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) | 1963-01-18 | 1963-07-20 | 1964-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-18 | 1967-07-20 | 1968-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-18 | 1971-07-20 | 1972-01-19 | $7700.00 | Window Closed / Lapsed |