Patent US3783049A successfully refreshed from Google Patents.
US3783049A
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US
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Method of platinum diffusion
Assignee: Optron Inc
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Filing: 1971-03-31
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Granted: 1974-01-01
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Expires: 1991-03-31
Abstract
Abstract A METHOD FOR PROVIDING A CONTROLLED DEGRADATION OF MINORITY CARRIER LIFETIME IN A SILICON SEMICONDUCTOR CRYSTAL BODY EMPLOYING H2PT (OH)6 AS A SOURCE OF PLATIUM. ONE GRAM OF H2PT (OH)6 IS DISSOLVED IN 130 CC. OF ANHYDROUS ACETONE. APPROXIMATELY 0.05 CC. OF THIS SOLUTION IS PLACED ON THE SURFACE OF A SILICON SEMICONDUCTOR CRYSTAL BODY. THE SOLUTION IS DRIED AND THEN THE BODY IS HEATED TO THE PLATINUM DIFFUSION TEMPERATURE FOR A TIME SUFFICIENT TO HAVE PLATINUM ATOMS UNIFORMLY DISTTIBUTED THROUGHOUT THE ACTIVE PORTION OF THE SILICON CRYSTAL.
Inventors
- 👤 J Sandera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:35
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/18; H10P32/17; H10P32/171; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |