US2840495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing semiconductive materials
Assignee: AT&T Inc
•
Filing: 1953-08-21
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Granted: 1958-06-24
•
Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Robert G Treuting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:03
CPC Classifications
H; H10; H10P; H10P36/00; C; C22; C22F; C22F1/00; C22F1/16; C30; C30B; C30B31/00; C30B31/02; H10D; H10D62/00; H10D62/60; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF PRODUCING A P-N JUNCTION IN A SOLID BODY OF AN SEMICONDUCTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SAID BODY MANIFESTING N-TYPE CONDUCTIVITY AND HAVING A RESISTIVITY OF AT LEAST ONE OHM-CENTIMETER, COMPRISING HEATING AT LEAST A PORTION OF THE SAID BODY TO A TEMPERATURE OF ABOVE 60 PERCENT OF THE MELTING TEMPERATURE OF THE SAID SEMICONDUCTIVE MATERIAL ON AN ABSOLUTE TEMPERATURE SCALE, APPLYING STRESS TO THE SAID BODY SO AS TO STRAIN ONLY THE SAID PORTION BEYOND ITS ELASTIC LIMIT WHEREBY THE STRAINED PORTION IS CONVERTED TO P-TYPE SO THAT A P-N JUNCTION RESULTS BETWEEN THE SAID STRAINED PORTION AND THE REMAINDER OF THE BODY AND COOLING THE SAID BODY.
Claim 2
Independent Claim
117 words
THE METHOD OF PRODUCING A P-N JUNCTION IN A SOLID BODY OF AN SEMICONDUCTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF GERMANIUM AND SILICON, SAID BODY MANIFESTING N-TYPE CONDUCTIVITY AND HAVING A RESISTIVITY OF AT LEAST ONE OHM-CENTIMETER, COMPRISING HEATING AT LEAST A PORTION OF THE SAID BODY TO A TEMPERATURE OF ABOVE 60 PERCENT OF THE MELTING TEMPERATURE OF THE SAID SEMICONDUCTIVE MATERIAL ON AN ABSOLUTE TEMPERATURE SCALE, APPLYING STRESS TO THE SAID BODY SO AS TO STRAIN ONLY THE SAID PORTION BEYOND ITS ELASTIC LIMIT WHEREBY THE STRAINED PORTION IS CONVERTED TO P-TYPE SO THAT A P-N JUNCTION RESULTS BETWEEN THE SAID STRAINED PORTION AND THE REMAINDER OF THE BODY AND COOLING THE SAID BODY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |