US2870050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices and methods of making same
Assignee: RCA Corp
•
Filing: 1957-06-25
•
Granted: 1959-01-20
•
Expires: 1977-06-25
Abstract
No abstract record available.
Inventors
- 👤 Charles W Mueller
- 👤 Jane M Printon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:41
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/10; C; C30; C30B; C30B31/00; C30B31/02; H10D62/80; H10D62/83; H10D62/834; H10D99/00; H10P; H10P32/00; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN THE FABRICATION OF RECTIFYING JUNCTIONS BY THE INTRODUCTION OF A VAPORIZED CONDUCTIVITY TYPE-DETERMINING SUBSTANCE INTO SEMICONDUCTOR WAFERS, THE IMPROVEMENT COMPRISING EXPOSING SAID WAFERS TO THE VAPORS EMITTED BY POWDERED SEMICONDUCTIVE MATERIAL WHICH HAS BEEN ALLOYED WITH UP TO 10 PERCENT BY WEIGHT OF SAID TYPE-DETERMINING SUBSTANCE, AND HEATING SAID WAFERS AND SAID POWDERED ALLOY MATERIAL SO THAT SAID VAPORIZED TYPE-DETERMINING SUBSTANCE DIFFUSES INTO SAID WAFERS AND FORMS A RECTIFYING JUNCTION AT A PREDETERMINED DEPTH.
Claim 2
Dependent Claim
75 words
IN THE FABRICATION OF RECTIFYING JUNCTIONS BY THE INTRODUCTION OF A VAPORIZED CONDUCTIVITY TYPE-DETERMINING SUBSTANCE INTO SEMICONDUCTOR WAFERS, THE IMPROVEMENT COMPRISING EXPOSING SAID WAFERS TO THE VAPORS EMITTED BY POWDERED SEMICONDUCTIVE MATERIAL WHICH HAS BEEN ALLOYED WITH UP TO 10 PERCENT BY WEIGHT OF SAID TYPE-DETERMINING SUBSTANCE, AND HEATING SAID WAFERS AND SAID POWDERED ALLOY MATERIAL SO THAT SAID VAPORIZED TYPE-DETERMINING SUBSTANCE DIFFUSES INTO SAID WAFERS AND FORMS A RECTIFYING JUNCTION AT A PREDETERMINED DEPTH.
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |