US2857296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of forming a junction in a semiconductor
Assignee: The General Electric Company PLC
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Filing: 1956-08-02
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Granted: 1958-10-21
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Expires: 1976-08-02
Abstract
No abstract record available.
Inventors
- 👤 Farris Victor Desmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:27
CPC Classifications
H; H10; H10P; H10P10/00; C; C30; C30B; C30B31/00; C30B31/04; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF FORMING A JUNCTION IN SILICON, IN WHICH A BODY OF MOLTEN TIN IS DROPPED ON TO A SOLID BODY OF SILICON THROUGH AN APERTURE IN A MASK IN CONTACT WITH THE BODY, THE TEMPERATURES OF THE SILICON BODY AND THE MOLTEN TIN BEING AT LEAST 1050*C. AND AN EFFECTIVE AMOUNT OF A SUBSTANCE CAPABLE OF ACTING IN SILICON AS A SIGNIFICANT IMPURITY BEING DISSOLVED AT SOME STAGE IN THE MOLTEN TIN, AND THE MOLTEN TIN IS SUBSEQUENTLY SOLIDIFIED, AFTER IT HAS DISSOLVED PART OF THE SILICON BODY, IN SUCH A MANNER THAT A LAYER OF SOLID SILICON CONTAINING SAID SUBSTANCE IS DEPOSITED CONTIGUOUS WITH THE REMAINDER OF THE BODY FROM THE MOLTEN TIN.
Claim 2
Independent Claim
116 words
A METHOD OF FORMING A JUNCTION IN SILICON, IN WHICH A BODY OF MOLTEN TIN IS DROPPED ON TO A SOLID BODY OF SILICON THROUGH AN APERTURE IN A MASK IN CONTACT WITH THE BODY, THE TEMPERATURES OF THE SILICON BODY AND THE MOLTEN TIN BEING AT LEAST 1050*C. AND AN EFFECTIVE AMOUNT OF A SUBSTANCE CAPABLE OF ACTING IN SILICON AS A SIGNIFICANT IMPURITY BEING DISSOLVED AT SOME STAGE IN THE MOLTEN TIN, AND THE MOLTEN TIN IS SUBSEQUENTLY SOLIDIFIED, AFTER IT HAS DISSOLVED PART OF THE SILICON BODY, IN SUCH A MANNER THAT A LAYER OF SOLID SILICON CONTAINING SAID SUBSTANCE IS DEPOSITED CONTIGUOUS WITH THE REMAINDER OF THE BODY FROM THE MOLTEN TIN.
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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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |