Patent US3323957A successfully refreshed from Google Patents.
US3323957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of semiconductor devices
Assignee: Westinghouse Electric Corp
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Filing: 1964-11-05
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Granted: 1967-06-06
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Expires: 1984-11-05
Abstract
No abstract record available.
Inventors
- 👤 Gerald D Rose
- 👤 Paul F Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:44
CPC Classifications
H; H10; H10P; H10P95/00; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P14/6324; H10P14/66; H10P14/665; H10P50/00; Y; Y10; Y10S; Y10S148/00; Y10S148/117; Y10S148/118; Y10S438/00; Y10S438/964; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE METHOD FOR PRODUCING SEMICONDUCTOR DEVICES, THE STEPS COMPRISING: FORMING A RELATIVELY THIN, POROUS OXIDE COATING ON ONE SURFACE OF A SEMICONDUCTOR WAFER, THE SURFACE BEING SUBSTANTIALLY UNIFORMLY PITTED THEREFROM, REMOVING THE OXIDE COATING, THEREBY EXPOSING SAID PITTED SURFACE, AND DISPOSING A METALLIC CONTACT MEMBER ON THE PITTED SURFACE AND SUBJECTING THE WAFER AND CONTACT MEMBER TO A TEMPERATURE SUFFICIENT TO CAUSE ALLOYING BETWEEN A PORTION OF THE SEMICONDUCTOR WAFER AND THE CONTACT MEMBER WHEREBY A SUBSTANTIALLY UNIFORM REGION OF RECRYSTALLIZATION IS MAINTAINED BETWEEN THE ALLOYED PORTION AND THE WAFER PORTION.
Claim 2
Dependent Claim
92 words
IN THE METHOD FOR PRODUCING SEMICONDUCTOR DEVICES, THE STEPS COMPRISING: FORMING A RELATIVELY THIN, POROUS OXIDE COATING ON ONE SURFACE OF A SEMICONDUCTOR WAFER, THE SURFACE BEING SUBSTANTIALLY UNIFORMLY PITTED THEREFROM, REMOVING THE OXIDE COATING, THEREBY EXPOSING SAID PITTED SURFACE, AND DISPOSING A METALLIC CONTACT MEMBER ON THE PITTED SURFACE AND SUBJECTING THE WAFER AND CONTACT MEMBER TO A TEMPERATURE SUFFICIENT TO CAUSE ALLOYING BETWEEN A PORTION OF THE SEMICONDUCTOR WAFER AND THE CONTACT MEMBER WHEREBY A SUBSTANTIALLY UNIFORM REGION OF RECRYSTALLIZATION IS MAINTAINED BETWEEN THE ALLOYED PORTION AND THE WAFER 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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |