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US 3,935,582 AGranted
Selenium rectifier
AssigneeInternational Standard Electric Corporation
InventorsJohn Duckles Underwood, David George Watts
Life of this patent
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Abstract
This invention relates to selenium rectifiers and a method of making them. Using techniques of electrophoretic deposition of selenium, a selenium rectifier is manufactured having a barrier layer adjacent the base electrode. This results in a cheaper rectifier with improved heat dissipation.
Claims9
A selenium rectifier comprising:
- a metal plate base electrode;
- at least one metal layer deposited on one surface of said metal plate, said metal layer consisting of a metal different than that of said metal plate;
- a layer of cadmium on said metal layer;
- a layer of thallium on said cadmium layer;
- a first layer of amorphous selenium on said thallium layer;
- a second layer of selenium containing a halogen additive, said second layer deposited on said first layer;
- a third layer of selenium containing a halogen additive and a metallic dopant, said third layer deposited on said second layer;
- and
- a metal counter electrode layer deposited on said third layer.
6 more elements
Dependencies are inferred from the claim text.