US2873221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating semi-conductive bodies
Assignee: US Philips Corp
•
Filing: 1956-10-29
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Granted: 1959-02-10
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Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Nijland Louis Marius
- 👤 Haaijman Pieter Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
H; H10; H10P; H10P32/00; C; C01; C01B; C01B33/00; C01B33/02; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C30; C30B; C30B31/00; C30B31/02; H10D; H10D62/00; H10D62/80; H10D62/83; H10D62/834; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF EFFECTING A CHANGE IN THE CHARACTER OF A PORTION OF A SEMI-CONDUCTIVE MONOCRYSTALLINE BODY SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM, COMPRISING BRING INTO CONTACT WITH SAID BODY PORTION A POWDERY MIXTURE COMPRISING AS A MAJOR CON STITUENT A REFRACTORY, INERT SUBSTANCE WHOSE MELTING POINT SUBSTANTIALLY EXCEEDS THAT OF THE SEMI-CONDUCTIVE BODY AND AS A MINOR CONSTITUENT AN ACTIVE IMPURITY SUBSTANCE CAPABLE OF EFFECTING THE CHANGE DESIRED WHEN INCORPORATED IN THE BODY PORTION, AND HEATING SAID CONTACTING BODY PORTION AND POWDERY MIXTURE IN AN INERT ATMOSPHERE AND AT A TEMPERATURE BELOW THE FUSION TEMPERATURE OF THE IN ERT SUBSTANCE AND AT WHICH ACTIVE SUBSTANCE IS FREED FROM THE MIXTURE AND CAUSED TO DIFFUSE INTO THE BODY PORION AND THEREBY EFFECT THE CHANGE DESIRED
Claim 2
Independent Claim
128 words
A METHOD OF EFFECTING A CHANGE IN THE CHARACTER OF A PORTION OF A SEMI-CONDUCTIVE MONOCRYSTALLINE BODY SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM, COMPRISING BRING INTO CONTACT WITH SAID BODY PORTION A POWDERY MIXTURE COMPRISING AS A MAJOR CON STITUENT A REFRACTORY, INERT SUBSTANCE WHOSE MELTING POINT SUBSTANTIALLY EXCEEDS THAT OF THE SEMI-CONDUCTIVE BODY AND AS A MINOR CONSTITUENT AN ACTIVE IMPURITY SUBSTANCE CAPABLE OF EFFECTING THE CHANGE DESIRED WHEN INCORPORATED IN THE BODY PORTION, AND HEATING SAID CONTACTING BODY PORTION AND POWDERY MIXTURE IN AN INERT ATMOSPHERE AND AT A TEMPERATURE BELOW THE FUSION TEMPERATURE OF THE IN ERT SUBSTANCE AND AT WHICH ACTIVE SUBSTANCE IS FREED FROM THE MIXTURE AND CAUSED TO DIFFUSE INTO THE BODY PORION AND THEREBY EFFECT THE CHANGE DESIRED
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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |