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Patent US2970896A successfully refreshed from Google Patents.
US2970896A
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Method for making semiconductor devices
Assignee: Texas Instruments Inc
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Filing: 1958-04-25
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Granted: 1961-02-07
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Expires: 1978-04-25
Abstract
No abstract record available.
Inventors
- 👤 Cornelison Boyd
- 👤 Milton K Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:44
CPC Classifications
H; H10; H10P; H10P52/00; C; C23; C23F; C23F1/00; C23F1/02; H10D; H10D10/00; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/085; Y10S438/00; Y10S438/942; Y10S438/945; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49117; Y10T29/49124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE METHOD OF TREATING A SAMPLE OF SEMICONDUCTOR MATERIAL COMPRISING THE STEPS OF PLACING A STENCIL OVER SAID SAMPLE, EVAPORATING SULPHUR THROUGH SAID STENCIL ONTO SAID SAMPLE, SUBJECTING SAID SAMPLE TO AN ETCHING TREATMENT, AND THEREAFTER REMOVING SAID SULPHUR.
Claim 2
Independent Claim
39 words
THE METHOD OF TREATING A SAMPLE OF SEMICONDUCTOR MATERIAL COMPRISING THE STEPS OF PLACING A STENCIL OVER SAID SAMPLE, EVAPORATING SULPHUR THROUGH SAID STENCIL ONTO SAID SAMPLE, SUBJECTING SAID SAMPLE TO AN ETCHING TREATMENT, AND THEREAFTER REMOVING SAID SULPHUR.
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |