Patent ID: 6600192
Filing Date: 2003-07-29
Classification: H01L

Abstract:
A field effect semiconductor device comprising:a drift region of a first conductive type of a low impurity density formed on a drain region of the first conductive type of a high impurity density, a drain electrode formed on the face of said drain region opposite to a face contacting to said drift region, a buried gate region of a second conductive type formed in a central region adjacent to the opposite face to a face contacting to said drain region, in said drift region; a buried gate contact region of a second conductive type formed in an end part region adjacent to said opposite face of a face contacting to said drain region, in said drift region; a gate contact region of a second conductive type formed on a part of said buried gate contact region; a channel region of a first conductive type formed in a region surrounded by said opposite face of said drift region and said gate contact region; a source region of a first conductive type formed in a central region adjacent to the surface of said channel region; an insulating film formed on a part of the surface of said gate contact region, on the surface of said channel region and on a part of the surface of said source region; a gate electrode provided on the surface of said insulating film and the surface of the gate contact region; and a source electrode provided on said source region.