US3260633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing semiconductor junction areas
Assignee: Siemens and Halske AG
•
Filing: 1962-12-19
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Granted: 1966-07-12
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Expires: 1982-12-19
Abstract
No abstract record available.
Inventors
- 👤 Seiter Hartmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:57
CPC Classifications
H; H10; H10P; H10P95/00; C; C23; C23F; C23F1/00; C23F1/02; H10D; H10D99/00; H10P50/00; H10P50/60; H10P50/64; H10P50/642; H10P50/646
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE PRODUCTION OF SEMICONDUCTOR MEMBERS HAVING A CRYSTALLINE SEMICONDUCTOR BODY OF GALLIUM ARSENIDE WITH AN ALLOY-BONDED ELECTRODE PELLET TO TIM, THE METHOD OR REDUCING THE JUNCTION AREA BETWEEN DIFFERENT CONDUCTANCE REGIONS IN THE BODY NEAR THE PELLET, WHICH COMPRISES SUBJECTING THE SEMICONDUCTOR MEMBER TO AN ETCHING AGENT CONSISTING OF AQUA REGIA AND PREPONDERANT SHARE OF PHOSPHORIC ACID REACTIVE WITH THE TIN PELLET TO FORM A SUBSTANTIALLY INSOLUBLE COATING ON THE PELLET, SAID ETCHING AGENT BEING A SOLVENT RELATIVE TO THE GALLIUM ARSENIDE SEMICONDUCTOR MATERIAL, SO THAT SAID SEMICONDUCTOR BODY IS ETCHED AWAY NEAR THE PELLET TO THEREBY REDUCE THE SIZE OF THE JUNCTION AREA.
Claim 2
Dependent Claim
105 words
IN THE PRODUCTION OF SEMICONDUCTOR MEMBERS HAVING A CRYSTALLINE SEMICONDUCTOR BODY OF GALLIUM ARSENIDE WITH AN ALLOY-BONDED ELECTRODE PELLET TO TIM, THE METHOD OR REDUCING THE JUNCTION AREA BETWEEN DIFFERENT CONDUCTANCE REGIONS IN THE BODY NEAR THE PELLET, WHICH COMPRISES SUBJECTING THE SEMICONDUCTOR MEMBER TO AN ETCHING AGENT CONSISTING OF AQUA REGIA AND PREPONDERANT SHARE OF PHOSPHORIC ACID REACTIVE WITH THE TIN PELLET TO FORM A SUBSTANTIALLY INSOLUBLE COATING ON THE PELLET, SAID ETCHING AGENT BEING A SOLVENT RELATIVE TO THE GALLIUM ARSENIDE SEMICONDUCTOR MATERIAL, SO THAT SAID SEMICONDUCTOR BODY IS ETCHED AWAY NEAR THE PELLET TO THEREBY REDUCE THE SIZE OF THE JUNCTION AREA.
References Cited (Backward Citations)
US3081211A
Cited
US3110849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |