Manufacture of electrical rectifiers

Manufacture of electrical rectifiers

521,455. Asymetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Nov. 18, 1938, No. 33566. Convention date, Dec. 27, 1937. [Class 37] Previous to the normal oxidizing treatment, copper blanks for rectifiers are heated to about 1000‹C. in an oxidizing atmosphere and the oxide...

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Bibliographische Detailangaben
1. Verfasser: DOWLING PHILIP H
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Zusammenfassung:521,455. Asymetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd. Nov. 18, 1938, No. 33566. Convention date, Dec. 27, 1937. [Class 37] Previous to the normal oxidizing treatment, copper blanks for rectifiers are heated to about 1000‹C. in an oxidizing atmosphere and the oxide layer thus produced removed, for example by nitric acid, and the blanks washed to free them from traces of acid &c.