US3248681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacts for semiconductor devices
Assignee: Westinghouse Electric Corp
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Filing: 1962-03-30
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Granted: 1966-04-26
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Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 Robert J Reintgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:28
CPC Classifications
H; H10; H10P; H10P95/00; H01; H01C; H01C7/00; H10W; H10W40/00; H10W40/60; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12528; Y10T428/12674; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12951; Y10T428/23; Y10T428/239
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A SEMICONDUCTOR DEVICE COMPRISING, IN COMBINATION, A SEMICONDUCTOR ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM AND AT LEAST ONE RELATIVELY FLAT COMPOSITE METALLIC BASE MEMBER COMPRISING AT LEAST THREE METAL LAYERS OF AT LEAST TWO DIFFERENT METALS, THE COMPOSITE BASE MEMBER BONDED TO THE ELEMENT AT ONE FLAT FACE AND THE BASE MEMBER HAVING A PORTION EXTENDING LATERALLY BEYOND THE SEMICONDUCTOR ELEMENT, THE OUTER METAL LAYERS OF THE MEMBER HAVING A THERMAL COEFFICIENT OF EXPANSION OF ABOUT THE SAME VALUE AS THAT OF THE ELEMENT, THE INNER METAL LAYER HAVING A RELATIVELY HIGH THERMAL CONDUCTIVITY SO THAT HEAT IS READILY DISSIPATED LONGITUDINALLY THROUGH THE MEMBER TO THE LATERALLY EXTENDING PORTION.
Claim 2
Dependent Claim
113 words
A SEMICONDUCTOR DEVICE COMPRISING, IN COMBINATION, A SEMICONDUCTOR ELEMENT SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM AND AT LEAST ONE RELATIVELY FLAT COMPOSITE METALLIC BASE MEMBER COMPRISING AT LEAST THREE METAL LAYERS OF AT LEAST TWO DIFFERENT METALS, THE COMPOSITE BASE MEMBER BONDED TO THE ELEMENT AT ONE FLAT FACE AND THE BASE MEMBER HAVING A PORTION EXTENDING LATERALLY BEYOND THE SEMICONDUCTOR ELEMENT, THE OUTER METAL LAYERS OF THE MEMBER HAVING A THERMAL COEFFICIENT OF EXPANSION OF ABOUT THE SAME VALUE AS THAT OF THE ELEMENT, THE INNER METAL LAYER HAVING A RELATIVELY HIGH THERMAL CONDUCTIVITY SO THAT HEAT IS READILY DISSIPATED LONGITUDINALLY THROUGH THE MEMBER TO THE LATERALLY EXTENDING PORTION.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |