US2870049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices and method of making same
Assignee: RCA Corp
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Filing: 1956-07-16
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Granted: 1959-01-20
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Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Charles W Mueller
- 👤 Ralph L Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:10
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE FARICATION OF RECTIFYING JUNCTIONS BY THE INTRODUCTION OF VAPORIZED CONDUCTIVITY TYPE-DETERMINING IMPURITIES INTO MONOCRYSTALLINE SEMICONDUCTOR WAFERS, THE IMPROVEMENT COMPRISING STACKING SAID WAFERS IN A WELL IN A JIG, SAID WAFERS SUBSTANTIALLY FILLING SAID WELL, INSERTING WITHIN SAID STACK IN SAID WELL AT LEAST ONE SOURCE WAFER HEAVILY DOPED WITH A CONDUCTIVITY TYPE-DETERMINING IMPURITY MATERIAL, AND HEATING SAID JIG IN A NON-OXIDIZING ATMOSPHERE SO THAT SAID CONDUCTIVITY TYPE-DETERMINING IMPURITY IS EMITTED BY SAID SOURCE WAFER AND DIFFUSES INTO THE SURFACES OF SAID MONOCRYSTALLINE WAFERS TO FORM A RECTIFYING JUNCTION AT A PRE-DETERMINED DEPTH.
Claim 2
Dependent Claim
94 words
IN THE FARICATION OF RECTIFYING JUNCTIONS BY THE INTRODUCTION OF VAPORIZED CONDUCTIVITY TYPE-DETERMINING IMPURITIES INTO MONOCRYSTALLINE SEMICONDUCTOR WAFERS, THE IMPROVEMENT COMPRISING STACKING SAID WAFERS IN A WELL IN A JIG, SAID WAFERS SUBSTANTIALLY FILLING SAID WELL, INSERTING WITHIN SAID STACK IN SAID WELL AT LEAST ONE SOURCE WAFER HEAVILY DOPED WITH A CONDUCTIVITY TYPE-DETERMINING IMPURITY MATERIAL, AND HEATING SAID JIG IN A NON-OXIDIZING ATMOSPHERE SO THAT SAID CONDUCTIVITY TYPE-DETERMINING IMPURITY IS EMITTED BY SAID SOURCE WAFER AND DIFFUSES INTO THE SURFACES OF SAID MONOCRYSTALLINE WAFERS TO FORM A RECTIFYING JUNCTION AT A PRE-DETERMINED DEPTH.
References Cited (Backward Citations)
US2695852A
Cited
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 |