US3083441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for fabricating transistors
Assignee: Texas Instruments Inc
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Filing: 1959-04-13
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Granted: 1963-04-02
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 William A Little
- 👤 Stacy B Watelski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:04
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/141; H10P32/17; H10P32/171; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/028
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
FIG-01
Claim 2
Dependent Claim
1 words
FIG-01
Claim 3
Independent Claim
88 words
THE METHOD OF FABICATING A SEMICONDUCTOR ELEMENT WHICH COMPRISES FORMING A PLATE OF SEMICONDUCTIVE MATERIAL OF ONE CONDUCTIVITY TYPE, DIFFUSING IMPURITIES OF OPPOSITE CONDUCTIVITY TYPES INTO OPPOSITE FACES OF SAID PLATE, FORMING A CHANNEL IN THAT FACE OF SAID PLATE HAVING A DIFFUSED LAYER OF THE SAME CONDUCTIVITY TYPE AS SAID PLATE, AND DIFFUSING AN IMPURITY OF THE OPPOSITE CONDUCTIVITY TYPE INTO THE FLOOR OF SAID CHANNEL TO FORM AN EMITTER LAYER OF THE SAME CONDUCTIVITY TYPE AS THE DIFFUSED REGION ON THE UNCHANNELED FACE OF SAID PLATE.
Claim 4
Independent Claim
88 words
THE METHOD OF FABICATING A SEMICONDUCTOR ELEMENT WHICH COMPRISES FORMING A PLATE OF SEMICONDUCTIVE MATERIAL OF ONE CONDUCTIVITY TYPE, DIFFUSING IMPURITIES OF OPPOSITE CONDUCTIVITY TYPES INTO OPPOSITE FACES OF SAID PLATE, FORMING A CHANNEL IN THAT FACE OF SAID PLATE HAVING A DIFFUSED LAYER OF THE SAME CONDUCTIVITY TYPE AS SAID PLATE, AND DIFFUSING AN IMPURITY OF THE OPPOSITE CONDUCTIVITY TYPE INTO THE FLOOR OF SAID CHANNEL TO FORM AN EMITTER LAYER OF THE SAME CONDUCTIVITY TYPE AS THE DIFFUSED REGION ON THE UNCHANNELED FACE OF SAID PLATE.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |