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Solid state radiation detector and process

  • US 4,000,502 A
  • Filed: 11/05/1973
  • Issued: 12/28/1976
  • Est. Priority Date: 11/05/1973
  • Status: Expired due to Term
First Claim
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1. A solid state radiation detector utilizing a Schottky barrier in a photovoltaic detector configuration wherein the improvement comprises:

  • a wafer of crystalline cadmium sulfide having first and second surfaces;

    a layer of platinum on said first surface of said wafer, said platinum layer being sufficiently thin to be substantially transparent to ultraviolet radiation, said platinum layer being additionally substantially transparent to infrared radiation;

    an insulating layer on said first surface of said wafer, said insulating layer disposed to define an active area of said platinum layer;

    a first metallic member superimposed on said insulating layer making contact with said active area of said platinum layer, said first metallic member substantially shielding said wafer from infrared radiation in that area of said wafer outside said active area of said platinum layer;

    said second surface of said wafer having an area defining a window substantially directly opposite said active area of platinum layer, said area on said second surface allowing the passage therethrough of infrared radiation; and

    a second metallic member making contact with said second surface of said wafer.

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