US2965519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making improved contacts to semiconductors
Assignee: AT&T Inc
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Filing: 1958-11-06
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Granted: 1960-12-20
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Expires: 1978-11-06
Abstract
No abstract record available.
Inventors
- 👤 Christensen Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
H; H10; H10P; H10P95/00; H10P95/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF MAKING AN ELECTRICALLY CONDUCTING CONTACT ON A MATERIAL WHICH IS A MEMBER OF THE GROUP CONSISTING OF GERMANIUM AND SILICON, WHICH METHOD COMPRISES DEPOSITING A LAYOR OF GOLD BETWEEN 1500 ANGSTROM UNITS AND 10,000 ANGSTROM UNITS IN THICKNESS ON THE SURFACE OF SAID MATERIAL, DEPOSITING BISMUTH TRIOXIDE TO FORM A LAYER OF OXIDE BETWEEN 35 ANGSTROM UNITS AND 500 ANGSTROM UNITS THICK OVER SAID GOLD LAYER, AND THEN HEATING THE RESULTANT BODY AT A TEMPERATURE SUFFICIENTLY ABOVE THE EUTECTIC TEMPERATURE FOR GOLD AND SAID MATERIAL AND BELOW THE MELTING POINT OF SAID MATERIAL, WHEREBY GOLD IS ALLOYED WITH SAID MATERIAL.
Claim 2
Independent Claim
103 words
THE METHOD OF MAKING AN ELECTRICALLY CONDUCTING CONTACT ON A MATERIAL WHICH IS A MEMBER OF THE GROUP CONSISTING OF GERMANIUM AND SILICON, WHICH METHOD COMPRISES DEPOSITING A LAYOR OF GOLD BETWEEN 1500 ANGSTROM UNITS AND 10,000 ANGSTROM UNITS IN THICKNESS ON THE SURFACE OF SAID MATERIAL, DEPOSITING BISMUTH TRIOXIDE TO FORM A LAYER OF OXIDE BETWEEN 35 ANGSTROM UNITS AND 500 ANGSTROM UNITS THICK OVER SAID GOLD LAYER, AND THEN HEATING THE RESULTANT BODY AT A TEMPERATURE SUFFICIENTLY ABOVE THE EUTECTIC TEMPERATURE FOR GOLD AND SAID MATERIAL AND BELOW THE MELTING POINT OF SAID MATERIAL, WHEREBY GOLD IS ALLOYED WITH SAID MATERIAL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |