Patent US2714566A successfully refreshed from Google Patents.
US2714566A
Expired / Lapsed
US
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Method of treating a germanium junction rectifier
Assignee: RCA Corp
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Filing: 1952-05-28
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Granted: 1955-08-02
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Expires: 1972-05-28
Abstract
No abstract record available.
Inventors
- 👤 Loy E Barton
- 👤 Ralph L Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:08
CPC Classifications
H; H10; H10P; H10P50/00; H10P50/60; H10P50/61; H10P50/613; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/17; H10P32/171
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF TREATING A WAFER OF SEMI-CONDUCTIVE GERMANIUM OF ONE CONDUCTIVITY TYPE TO INTRODUCE A LAYER OF AN OPPOSITE CONDUCTIVITY TYPE THEREIN COMPRISING ELECTROLYTICALLY ETCHING THE SURFACE OF SAID WAFER IN A SOLUTION OF NOT MORE THAN 1/200 PERCENT ELECTROLYTE SOLUTE FREE FROM N-TYPE AND P-TYPE INPURITIES IN DISTILLED WATER, RINSING SAID SURFACE, PLACING A SELECTED IMPURITY UPON SAID SURFACE, SAID SELECTED IMPURITY BEING A MATERIAL WHICH WILL IMPART CONDUCTIVITY CHARACTERISTICS OF SAID OPPOSITE TYPE TO SAID BODY, AND HEATING SAID WAFER AND IMPURITY UNTIL SAID IMPURITY DIFFUSES INTO SAID WAFER THROUGH THE ELECTROLYTICALLY ETCHED SURFACE THEREOF.
Claim 2
Independent Claim
98 words
A METHOD OF TREATING A WAFER OF SEMI-CONDUCTIVE GERMANIUM OF ONE CONDUCTIVITY TYPE TO INTRODUCE A LAYER OF AN OPPOSITE CONDUCTIVITY TYPE THEREIN COMPRISING ELECTROLYTICALLY ETCHING THE SURFACE OF SAID WAFER IN A SOLUTION OF NOT MORE THAN 1/200 PERCENT ELECTROLYTE SOLUTE FREE FROM N-TYPE AND P-TYPE INPURITIES IN DISTILLED WATER, RINSING SAID SURFACE, PLACING A SELECTED IMPURITY UPON SAID SURFACE, SAID SELECTED IMPURITY BEING A MATERIAL WHICH WILL IMPART CONDUCTIVITY CHARACTERISTICS OF SAID OPPOSITE TYPE TO SAID BODY, AND HEATING SAID WAFER AND IMPURITY UNTIL SAID IMPURITY DIFFUSES INTO SAID WAFER THROUGH THE ELECTROLYTICALLY ETCHED SURFACE THEREOF.
References Cited (Backward Citations)
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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) | 1958-08-01 | 1959-01-31 | 1959-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-01 | 1963-01-31 | 1963-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-01 | 1967-01-31 | 1967-08-02 | $7700.00 | Window Closed / Lapsed |