PATENT COVER GRAPHIC

United States Patent 4,202,006
May 6, 1980

Semiconductor Integrated Circuit Device
Heshmat Khajezadeh

Filed May 21, 1979
Image of US PATENT 4,202,006

Abstract of the Disclosure

A semiconductor integrated circuit device includes circuit elements having relatively different performance characteristics in which buried regions having different chemical elements are used to autodope an epitaxial layer to different degrees.
Figure descriptions: cover graphic

  • a partial diagrammatic cross section of an example of an integrated circuit device illustrating the principles of the present invention. 

 Citations [54]:
  
3,759,760  09/1973  Encinas
3,846,192  11/1974  Murrmann
3,961,340  06/1976  Encinas
4,087,900  05/1978  Yiannonlos
National Museum of American History
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