US2861017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing semi-conductor devices
Assignee: Honeywell Inc
•
Filing: 1954-12-29
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Granted: 1958-11-18
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Expires: 1974-12-29
Abstract
No abstract record available.
Inventors
- 👤 Van W Bearinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:27
CPC Classifications
H; H10; H10P; H10P95/00; C; C30; C30B; C30B31/00; C30B31/04; H10P95/50; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF PREPARING A RELATIVELY HIGH-POWER ELECTRICAL CURRENT TRANSLATING DEVICE INCLUDING AN N-TYPE BODY OF GERMANIUM HAVING A SINGLE CRYSTAL ORIENTATION AND HAVING AN ALLOYED P-N JUNCTION ADJACENT A SURFACE THEREOF, WHICH METHOD COMPRISES MAKING A PRE-ALLOY OF GERMANIUM AND INDIUM CONTAINING UP TO 12% OF GERMANIUM, AND ALLOYING AND DIFFUSING A QUANTITY OF SAID PREPARED ALLOY TO A CONTROLLED DEPTH BELOW ONE SURFACE OF SAID BODY TO FORM SAID ALLOYED P-N JUNCTION IN SAID BODY, SAID ALLOYING AND DIFUSING OPERATION BEING CONDUCTED IN A TREATING ZONE PASSING THROUGH A HEATING CYCLE WHEREIN AN INTIAL ELEVATED TEMPERATURE OF ABOUT 925*F. IS ESTABLISHED, THIS TEMPERTURE BEING REDUCED RAPIDLY TO ABOUT 850*F. AND THENCE BEING COOLED SLOWLY TO ROOM TEMPERATURE AT A RATE OF ABOUT 80*F. PER MINUTE.
Claim 2
Independent Claim
127 words
THE METHOD OF PREPARING A RELATIVELY HIGH-POWER ELECTRICAL CURRENT TRANSLATING DEVICE INCLUDING AN N-TYPE BODY OF GERMANIUM HAVING A SINGLE CRYSTAL ORIENTATION AND HAVING AN ALLOYED P-N JUNCTION ADJACENT A SURFACE THEREOF, WHICH METHOD COMPRISES MAKING A PRE-ALLOY OF GERMANIUM AND INDIUM CONTAINING UP TO 12% OF GERMANIUM, AND ALLOYING AND DIFFUSING A QUANTITY OF SAID PREPARED ALLOY TO A CONTROLLED DEPTH BELOW ONE SURFACE OF SAID BODY TO FORM SAID ALLOYED P-N JUNCTION IN SAID BODY, SAID ALLOYING AND DIFUSING OPERATION BEING CONDUCTED IN A TREATING ZONE PASSING THROUGH A HEATING CYCLE WHEREIN AN INTIAL ELEVATED TEMPERATURE OF ABOUT 925*F. IS ESTABLISHED, THIS TEMPERTURE BEING REDUCED RAPIDLY TO ABOUT 850*F. AND THENCE BEING COOLED SLOWLY TO ROOM TEMPERATURE AT A RATE OF ABOUT 80*F. PER MINUTE.
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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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |