US2807561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of fusing materials to silicon
Assignee: RCA Corp
•
Filing: 1953-11-02
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Granted: 1957-09-24
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Expires: 1973-11-02
Abstract
No abstract record available.
Inventors
- 👤 Nelson Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
H; H10; H10P; H10P95/00; C; C30; C30B; C30B31/00; C30B31/04; H10P95/50; Y; Y10; Y10S; Y10S148/00; Y10S148/107; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF FUSING A CONDUCTIVITY TYPE-DETERMINING MATERIAL TO A SILICON SURFACE BEARING A FILM OF SILICON OXIDE, SAID METHOD COMPRISING PLACING A BODY OF SAID MATERIAL IN CONTACT WITH SAID FILM, INTRODUCING A FLUORIDE SALT TO SAID CONTACTED FILM, AND HEATING SAID MATERIAL, SAID FLUORIDE SALT AND SAID SILICON SURFACE TOGETHER TO A TEMPERATURE BELOW THE MELTING POINT OF SILICON AND AT LEAST AS HIGH AS THE MELTING POINT OF AN ALLOY OF SAID MATERIAL AND SILICON.
Claim 2
Independent Claim
78 words
A METHOD OF FUSING A CONDUCTIVITY TYPE-DETERMINING MATERIAL TO A SILICON SURFACE BEARING A FILM OF SILICON OXIDE, SAID METHOD COMPRISING PLACING A BODY OF SAID MATERIAL IN CONTACT WITH SAID FILM, INTRODUCING A FLUORIDE SALT TO SAID CONTACTED FILM, AND HEATING SAID MATERIAL, SAID FLUORIDE SALT AND SAID SILICON SURFACE TOGETHER TO A TEMPERATURE BELOW THE MELTING POINT OF SILICON AND AT LEAST AS HIGH AS THE MELTING POINT OF AN ALLOY OF SAID MATERIAL AND SILICON.
References Cited (Backward Citations)
US2194200A
Cited
US2583681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |