United States Patent 3,462,298
August 19, 1969

Oxide Coating For Semiconductor Surfaces
Koichi Ikeda
Katsuji Minagawa
Toru Nakagawa

Filed September 8, 1965
Image of US PATENT 3,462,298

Abstract of the Disclosure

Contamination of the surfaces of semiconductor devices such as diodes, rectifiers, and transistors, is obviated by vapor depositing particularly over the junction area, a substance including a major percentage of lead oxide and a minor percentage of at least one metal oxide selected from among tungsten oxide, molybdenum oxide, chromium oxide, and germanium oxide
Figure descriptions: cover graphic

  • Figure 1 and 2 illustrate alternative methods for introducing the peripheral coating according to the invention; and
  • Figure 3 shows, in cross-section, a germanium diode incorporating the invention.

 Citations [54]:
2,937,110 05/1960 John 2,989,424 06/1961 Angello 3,222,219 12/1965 Saunders 3,303,399 02/1967 Hoodgendorn
National Museum of American History
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