Patent US3203840A successfully refreshed from Google Patents.
US3203840A
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Diffusion method
Assignee: Texas Instruments Inc
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Filing: 1961-12-14
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Granted: 1965-08-31
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Expires: 1981-12-14
Abstract
No abstract record available.
Inventors
- 👤 Harris Ronald Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6322; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/141; H10P32/17; H10P32/171; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/049; Y10S148/078; Y10S148/144; Y10S148/145; Y10S148/155; Y10S438/00; Y10S438/914; Y10S438/92; Y10S438/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE METHOD OF SELECTIVELY DIFUSSING GALLIUM INTO A SILICON BODY COMPRISING THE STEPS OF FORMING A LAYER OF SILICON DIOXIDE ON A SURFACE OF SAID BODY, DIFFUSING GALLIUM THROUGH SAID SILICON DIOXIDE AND INTO SAID BODY TO FORM A CONCENTRATION OF SAID GALLIUM WITHIN SAID SURFACE, REMOVING SAID SILICON DIOXIDE FROM A SELECTED PORTION OF SAID SURFACE, AND SUBSEQUENTLY OXIDIZING SAID SELECTED PORTION OF SAID SURFACE.
Claim 2
Independent Claim
66 words
THE METHOD OF SELECTIVELY DIFUSSING GALLIUM INTO A SILICON BODY COMPRISING THE STEPS OF FORMING A LAYER OF SILICON DIOXIDE ON A SURFACE OF SAID BODY, DIFFUSING GALLIUM THROUGH SAID SILICON DIOXIDE AND INTO SAID BODY TO FORM A CONCENTRATION OF SAID GALLIUM WITHIN SAID SURFACE, REMOVING SAID SILICON DIOXIDE FROM A SELECTED PORTION OF SAID SURFACE, AND SUBSEQUENTLY OXIDIZING SAID SELECTED PORTION OF SAID SURFACE.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |