US3076732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uniform n-type silicon
Assignee: AT&T Inc
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Filing: 1959-12-15
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Granted: 1963-02-05
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Expires: 1979-12-15
Abstract
No abstract record available.
Inventors
- 👤 Tanenbaum Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:21
CPC Classifications
C; C22; C22F; C22F3/00; C01; C01B; C01B33/00; C01B33/02; C01B33/037; H; H10; H10P; H10P34/00; H10P34/20; Y; Y10; Y10S; Y10S148/00; Y10S148/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
METHOD FOR PRODUCING UNIFORM RESISTIVITY N-TYPE SILICON OF A DESIRED EXCESS SIGNIFICANT IMPURITY CONCENTRATION COMPRISING BOMBARDNG A BODY OF SILICON HAVING AN EXCESS SIGNIFICANT IMPURITY CONCENTRATION LEVEL AT LEAST ONE ORDER OF MAGNITUDE LESS THAN THE DESIRED CONCENTRA TION WITH PREDOMINANTLY THERMAL NEUTRONS SO AS TO CONVER A FRACTION OF SILICON 30 TO PHOSPHOROUS 31, AND SUBSEQUENTLY ANNEALING THE BOMBARDED BODY TO SUBSTANTIALLY REMOVE RADIATION DAMAGE.
Claim 2
Dependent Claim
66 words
METHOD FOR PRODUCING UNIFORM RESISTIVITY N-TYPE SILICON OF A DESIRED EXCESS SIGNIFICANT IMPURITY CONCENTRATION COMPRISING BOMBARDNG A BODY OF SILICON HAVING AN EXCESS SIGNIFICANT IMPURITY CONCENTRATION LEVEL AT LEAST ONE ORDER OF MAGNITUDE LESS THAN THE DESIRED CONCENTRA TION WITH PREDOMINANTLY THERMAL NEUTRONS SO AS TO CONVER A FRACTION OF SILICON 30 TO PHOSPHOROUS 31, AND SUBSEQUENTLY ANNEALING THE BOMBARDED BODY TO SUBSTANTIALLY REMOVE RADIATION DAMAGE.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |