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MOS Power transistor with improved high-voltage capability

  • US 4,345,265 A
  • Filed: 04/14/1980
  • Issued: 08/17/1982
  • Est. Priority Date: 04/14/1980
  • Status: Expired due to Term
First Claim
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1. An MOS transistor having improved breakdown characteristics comprising:

  • a drain region of first conductivity type;

    a body region of a second conductivity type in said drain region and forming a P-N junction therewith;

    a source region of said first conductivity type in said body region;

    a gate for inducing a surface channel region in said body between said source and drain regions; and

    low impedance means for reducing the breakdown voltage of said P-N junction away from said channel region, said means including a second region of said second conductivity type merged with said body region and extending further into said drain region than does said body region.

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