Patent US1943086A successfully refreshed from Google Patents.
US2986481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making semiconductor devices
Assignee: Raytheon Co
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Filing: 1958-08-04
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Granted: 1961-05-30
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Expires: 1978-08-04
Abstract
No abstract record available.
Inventors
- 👤 Richard A Gudmundsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:57
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/60; H10D10/00; H10D62/10; H10P; H10P95/00; H10P95/50; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF PRODUCING A LOW RESISTIVITY REGION WITHIN A SEMICONDUCTOR BODY COMPRISING THE STEPS OF: PREPARING AN ALLOY OF BORON AND AT LEAST ONE METAL HAVING A RELATIVELY HIGH NUMERICAL SEGREGATION COEFFICIENT WITH BORON, FORMING AT LEAST A PORTION OF SAID ALLOY TO DEFINE A WAFER HAVING AN OPENING THERETHROUGH, PLACING SAID WAFER OF SAID ALLOY UPON ONE SURFACE OF SAID SEMICONDUCTOR BODY, HEATING THE COMBINATION TO AT LEAST THE EUTECTIC TEMPERATURE OF A COMPOSITION COMPOSED OF THE
Claim 2
Independent Claim
79 words
THE METHOD OF PRODUCING A LOW RESISTIVITY REGION WITHIN A SEMICONDUCTOR BODY COMPRISING THE STEPS OF: PREPARING AN ALLOY OF BORON AND AT LEAST ONE METAL HAVING A RELATIVELY HIGH NUMERICAL SEGREGATION COEFFICIENT WITH BORON, FORMING AT LEAST A PORTION OF SAID ALLOY TO DEFINE A WAFER HAVING AN OPENING THERETHROUGH, PLACING SAID WAFER OF SAID ALLOY UPON ONE SURFACE OF SAID SEMICONDUCTOR BODY, HEATING THE COMBINATION TO AT LEAST THE EUTECTIC TEMPERATURE OF A COMPOSITION COMPOSED OF THE
References Cited (Backward Citations)
US2845374A
Cited
US2854366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |