US3151008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a p-nu junction
Assignee: Sprague Electric Co
•
Filing: 1960-09-23
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Granted: 1964-09-29
•
Expires: 1980-09-23
Abstract
No abstract record available.
Inventors
- 👤 John L Sprague
- 👤 Alvarez-Tostado Claudio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:30
CPC Classifications
C; C30; C30B; C30B33/00; C30B33/08; C30B33/12; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S438/00; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR DIFFUSION INTO A SILICON SEMICONDUCTOR BODY OF A DOPING AGENT INCAPABLE OF REDUCING THE OXIDE ON THE SILICON, SAID PROCESS COMPRISING ETCHING THE SILICON BODY TO A SMOOTH SURFACE, ATTACKING THE ETCHED SILICON SURFACE WITH DILUTE CHLORINE GAS IN THE PRESENCE OF CARBON, REMOVING SURFACE OXIDES FROM A DOPING AGENT INCAPABLE OF REDUCING THE OXIDE ON THE SILICON BODY PRIOR TO MELTING THE DOPING AGENT, SUBSTANTIALLY REMOVING THE CHLORINE FROM THE SILICON SURFACE WITH AN INERT GASS, AND APPLYING THE DOPING AGENT IN MOLTEN CONDITION TO THE CHLORINE ATTACKED SURFACE.
Claim 2
Dependent Claim
93 words
A PROCESS FOR DIFFUSION INTO A SILICON SEMICONDUCTOR BODY OF A DOPING AGENT INCAPABLE OF REDUCING THE OXIDE ON THE SILICON, SAID PROCESS COMPRISING ETCHING THE SILICON BODY TO A SMOOTH SURFACE, ATTACKING THE ETCHED SILICON SURFACE WITH DILUTE CHLORINE GAS IN THE PRESENCE OF CARBON, REMOVING SURFACE OXIDES FROM A DOPING AGENT INCAPABLE OF REDUCING THE OXIDE ON THE SILICON BODY PRIOR TO MELTING THE DOPING AGENT, SUBSTANTIALLY REMOVING THE CHLORINE FROM THE SILICON SURFACE WITH AN INERT GASS, AND APPLYING THE DOPING AGENT IN MOLTEN CONDITION TO THE CHLORINE ATTACKED SURFACE.
References Cited (Backward Citations)
US2744000A
Cited
US2807561A
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US2888782A
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US2887416A
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US2857296A
Cited
US2943005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |