US3097069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrolytic production of hyperpure silicon
Assignee: Siemens Schuckertwerke AG
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Filing: 1961-06-09
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Granted: 1963-07-09
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Expires: 1981-06-09
Abstract
No abstract record available.
Inventors
- 👤 Reuschel Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
C; C30; C30B; C30B13/00; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/035; C01B33/04; C01B33/08; C01B33/107; C30B29/00; C30B29/02; C30B29/06; H; H10; H10P; H10P14/00; H10P14/20; H10P14/24; H10P14/34; H10P14/3402; H10P14/3404; H10P14/3411; H10P14/3438; H10P14/3441; H10P14/3442; H10P14/3444; Y; Y10; Y10S; Y10S252/00; Y10S252/95; Y10S252/951; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE METHOD OF PRODUCING HYPERPURE SILICON BY PYROLYTIC PRECIPITATION FROM A GASEOUS SILICON-HALOGEN COMPOUND ONTO A SOLID, CARRIER BODY OF SILICON HEATED TO INCANDESCENT TEMPERATURE, WHICH COMPRISES EMPOLYING A LIQUID SILICON-HALOGEN COMPOUND CONTAINING A TRACE OF A PHOSPHORUS COMPOUND AS AN IMPURITY AND ADDING THERETO TO LEAST ONE BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORON CHLORIDE, BORON BROMIDE AND BORON IODIDE TO FORM AN ADMIXTURE, EVAPORATING THE SILICON COMPOUND VIRTUALLY FREE FROM PHOSPHORUS OFF THE ADMIXTURE AND PYROLYTICALLY PRECIPITATING SILICON FROM THE EVAPORATED SILICON COMPOUND ONTO THE HEATED SILICON BODY.
Claim 2
Independent Claim
92 words
THE METHOD OF PRODUCING HYPERPURE SILICON BY PYROLYTIC PRECIPITATION FROM A GASEOUS SILICON-HALOGEN COMPOUND ONTO A SOLID, CARRIER BODY OF SILICON HEATED TO INCANDESCENT TEMPERATURE, WHICH COMPRISES EMPOLYING A LIQUID SILICON-HALOGEN COMPOUND CONTAINING A TRACE OF A PHOSPHORUS COMPOUND AS AN IMPURITY AND ADDING THERETO TO LEAST ONE BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORON CHLORIDE, BORON BROMIDE AND BORON IODIDE TO FORM AN ADMIXTURE, EVAPORATING THE SILICON COMPOUND VIRTUALLY FREE FROM PHOSPHORUS OFF THE ADMIXTURE AND PYROLYTICALLY PRECIPITATING SILICON FROM THE EVAPORATED SILICON COMPOUND ONTO THE HEATED SILICON BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-08 | 1967-01-07 | 1967-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-08 | 1971-01-07 | 1971-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-08 | 1975-01-07 | 1975-07-09 | $7700.00 | Window Closed / Lapsed |