Patent US2916806A successfully refreshed from Google Patents.
US2916806A
Expired / Lapsed
US
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Plating method
Assignee: AT&T Inc
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Filing: 1957-01-02
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Granted: 1959-12-15
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Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 John F Pudvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/40; H10P14/46; C; C23; C23C; C23C18/00; C23C18/54; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
IN THE FABRICATION OF A SEMICONDUCTOR DEVICE THE METHOD OF PRODUCING AN OHMIC ELECTRODE TO A BODY OF A-TYPE CONDUCTIVITY MATERIAL WHICH COMPRISES IMMERSING SAID BODY IN AN ALKALINE SOLUTION OF A GOLD COMPOUND THEREBY TO PROVIDE, A GOLD COATING ON SAID PORTION AND REMOVING SAID BODY, THEN IMMERSING SAID BODY IN AN ACID SOLUTION OF A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY, ARSENIC AND BISMUTH WHILE CONTACTING SAID BODY WITH A METALS SELECTED FROM THE GROUP CONSISTING OF THOSE METALS HAVING A PLACE IN THE ELECTROMOTIVE FORCE SERRIES ABOVE THE REDUCTION POTENTIAL OF SAID COMPOUND OF ANTIMONY, ARSENIC, OR BISMUTH, THEREBY TO DEPOSIT A COATING OF THE METAL OF SAID COMPOUND OF SAID GOLD COATING AND REMOVING SAID BODY, THEN HEATING SAID BODY AT A TEMPERATURE FROM 400 TO 450 DEGREES CENTIGRADE FOR ABOUT 15 MINUTES, THEN HEATING SAID BODY AT FROM 700 TO 900 DEGREES CENTIGRADE FOR ABOUT 5 MINUTES, AND APPLYING AN EXTERNAL LEAD TO SAID COATING ON SAID BODY.
Claim 2
Dependent Claim
168 words
IN THE FABRICATION OF A SEMICONDUCTOR DEVICE THE METHOD OF PRODUCING AN OHMIC ELECTRODE TO A BODY OF A-TYPE CONDUCTIVITY MATERIAL WHICH COMPRISES IMMERSING SAID BODY IN AN ALKALINE SOLUTION OF A GOLD COMPOUND THEREBY TO PROVIDE, A GOLD COATING ON SAID PORTION AND REMOVING SAID BODY, THEN IMMERSING SAID BODY IN AN ACID SOLUTION OF A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF ANTIMONY, ARSENIC AND BISMUTH WHILE CONTACTING SAID BODY WITH A METALS SELECTED FROM THE GROUP CONSISTING OF THOSE METALS HAVING A PLACE IN THE ELECTROMOTIVE FORCE SERRIES ABOVE THE REDUCTION POTENTIAL OF SAID COMPOUND OF ANTIMONY, ARSENIC, OR BISMUTH, THEREBY TO DEPOSIT A COATING OF THE METAL OF SAID COMPOUND OF SAID GOLD COATING AND REMOVING SAID BODY, THEN HEATING SAID BODY AT A TEMPERATURE FROM 400 TO 450 DEGREES CENTIGRADE FOR ABOUT 15 MINUTES, THEN HEATING SAID BODY AT FROM 700 TO 900 DEGREES CENTIGRADE FOR ABOUT 5 MINUTES, AND APPLYING AN EXTERNAL LEAD TO SAID COATING ON SAID BODY.
References Cited (Backward Citations)
US2701326A
Cited
US2603693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |