US2836523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of semiconductive devices
Assignee: AT&T Inc
•
Filing: 1956-08-02
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Granted: 1958-05-27
•
Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Calvin S Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:24
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/18; H10P32/17; H10P32/171; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S438/00; Y10S438/914; Y10S438/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD FOR FORMING A RECTIFYING JUNCTION IN A CRYSTALLINE SEMICONDUCTIVE BODY COMPRISING THE STEPS OF INCLUDING IN SAID BODY A RAPIDLY DIFFUSING SIGNIFICANT IMPURITY CHARACTERISTIC OF ONE CONDUCTIVITY TYPE AND A RELATIVELY LOWER CONCENTRATION OF A SLOWLY DIFFUSING SIGNIFICANT IMPURITY CHARACTERISTIC OF THE OPPOSITE CONDUCTIVITY TYPE, CONTACTING WITH ONE SURFACE OF SAID BODY A LAYER OF A METAL CAPABLE OF GETTERING THE RAPIDLY DIFFUSING IMPURITY FROM THE BODY, AND HEATING THE BODY FOR A TIME AND TO A TEMPERATURE FOR GETTERING ENOUGH OF THE RAPIDLY DIFFUSINGG IMPURITY TO CONVERT A PORTION OF THE BODY CONTIGUOUS TO THE SAID LAYER TO THE OPPOSITE CONDUCTIVITY TYPE FOR FORMING A RECTIFYING JUNCTION WITHIN SAID BODY.
Claim 2
Independent Claim
113 words
A METHOD FOR FORMING A RECTIFYING JUNCTION IN A CRYSTALLINE SEMICONDUCTIVE BODY COMPRISING THE STEPS OF INCLUDING IN SAID BODY A RAPIDLY DIFFUSING SIGNIFICANT IMPURITY CHARACTERISTIC OF ONE CONDUCTIVITY TYPE AND A RELATIVELY LOWER CONCENTRATION OF A SLOWLY DIFFUSING SIGNIFICANT IMPURITY CHARACTERISTIC OF THE OPPOSITE CONDUCTIVITY TYPE, CONTACTING WITH ONE SURFACE OF SAID BODY A LAYER OF A METAL CAPABLE OF GETTERING THE RAPIDLY DIFFUSING IMPURITY FROM THE BODY, AND HEATING THE BODY FOR A TIME AND TO A TEMPERATURE FOR GETTERING ENOUGH OF THE RAPIDLY DIFFUSINGG IMPURITY TO CONVERT A PORTION OF THE BODY CONTIGUOUS TO THE SAID LAYER TO THE OPPOSITE CONDUCTIVITY TYPE FOR FORMING A RECTIFYING JUNCTION WITHIN SAID BODY.
References Cited (Backward Citations)
US2701326A
Cited
US2725315A
Cited
US2705767A
Cited
US2689930A
Cited
GB751408A
Cited
FR1114367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |