US3356543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of decreasing the minority carrier lifetime by diffusion
Assignee: RCA Corp
•
Filing: 1964-12-07
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Granted: 1967-12-05
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Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Desmond
- 👤 Leon S Greenberg
- 👤 Weisberg Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:03
CPC Classifications
H; H10; H10P; H10P95/00; H10D; H10D99/00; H10P32/00; H10P32/10; H10P32/17; H10P32/171; H10P32/18; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S438/00; Y10S438/914; Y10S438/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
THE METHOD OF DECREASING THE MINORITY CARRIER LIFETIME OF A CRYSTALLINE SILICON BODY WITHOUT UNDULY INCREASING THE RESISTIVITY OF SAID BODY, COMPRISING THE STEPS OF: DEPOSITING A METALLIC COATING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, AND NICKEL-COBALT ALLOYS ON AT LEAST ONE MAJOR FACE OF SAID BODY; HEATING SAID BODY TO DIFFUSE A PORTION OF SAID COATING INTO SAID BODY TO FORM A METAL-DIFFUSED REGION ADJACENT SAID ONE MAJOR FACE; REMOVING SAID METALLIC COATING; THEN DEPOSITING A FILM OF GOLD ON SAID ONE MAJOR FACE; AND, HEATING SAID BODY IN A NON-OXIDIZING AMBIENT TO DIFFUSE SAID GOLD THROUGH SAID METAL-DIFFUSED REGION INTO SAID BODY.
Claim 2
Independent Claim
106 words
THE METHOD OF DECREASING THE MINORITY CARRIER LIFETIME OF A CRYSTALLINE SILICON BODY WITHOUT UNDULY INCREASING THE RESISTIVITY OF SAID BODY, COMPRISING THE STEPS OF: DEPOSITING A METALLIC COATING SELECTED FROM THE GROUP CONSISTING OF NICKEL, COBALT, AND NICKEL-COBALT ALLOYS ON AT LEAST ONE MAJOR FACE OF SAID BODY; HEATING SAID BODY TO DIFFUSE A PORTION OF SAID COATING INTO SAID BODY TO FORM A METAL-DIFFUSED REGION ADJACENT SAID ONE MAJOR FACE; REMOVING SAID METALLIC COATING; THEN DEPOSITING A FILM OF GOLD ON SAID ONE MAJOR FACE; AND, HEATING SAID BODY IN A NON-OXIDIZING AMBIENT TO DIFFUSE SAID GOLD THROUGH SAID METAL-DIFFUSED REGION INTO SAID BODY.
References Cited (Backward Citations)
US2827436A
Cited
US2964689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |