Patent US3047437A successfully refreshed from Google Patents.
US3047437A
Expired / Lapsed
US
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Method of making a rectifier
Assignee: Infineon Technologies Americas Corp
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Filing: 1957-08-19
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Granted: 1962-07-31
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Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Lake D Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:28
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF ANNEALING A SILICONE JUCTION TYPE RECTIFER OF THE TYPE COMPRISING SILICON HAVING FUSED TO IT A MATERRIAL WHICH FORMS THE JUNCTION WHICH COMPRISES HEATING SAID RECTIFER FOR ABOUT FIVE TO TEN MINUTES DURING WHICH TIME THE TEMPERATURE OF SAID RECTIFER IS RAISED FROM AMBIENT TEMPERATURE TO ABOUT 600 DEGREES C., THEN MAINTAINING THE TEMPERATURE OF SAID RECTIFER AT ABOUT 600 DEGREES C. FOR ABOUT TEN MINUTES, THEN COOLING SAID RECTIFER FROM SAID 600 DEGREES C. TEMPERATURE TO AMBIENT TEMPERPERATURE IN ABOUT FIVE TO TEN MINUTES.
Claim 2
Independent Claim
88 words
THE METHOD OF ANNEALING A SILICONE JUCTION TYPE RECTIFER OF THE TYPE COMPRISING SILICON HAVING FUSED TO IT A MATERRIAL WHICH FORMS THE JUNCTION WHICH COMPRISES HEATING SAID RECTIFER FOR ABOUT FIVE TO TEN MINUTES DURING WHICH TIME THE TEMPERATURE OF SAID RECTIFER IS RAISED FROM AMBIENT TEMPERATURE TO ABOUT 600 DEGREES C., THEN MAINTAINING THE TEMPERATURE OF SAID RECTIFER AT ABOUT 600 DEGREES C. FOR ABOUT TEN MINUTES, THEN COOLING SAID RECTIFER FROM SAID 600 DEGREES C. TEMPERATURE TO AMBIENT TEMPERPERATURE IN ABOUT FIVE TO TEN MINUTES.
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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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |