Patent ID: 6236084
Filing Date: 2001-05-22
Classification: H01L

Abstract:
A semiconductor integrated circuit device, comprising:a first double diffusion insulated gate field effect transistor comprising a semiconductor substrate of a first conductivity type; an epitaxial layer of a second conductivity type formed on the semiconductor substrate of the first conductivity type; a source region and a drain region of the second conductivity type, each having a high impurity concentration, formed on the epitaxial layer of the second conductivity type, the source and drain regions being separated from each other by a given distance; a body region of the first conductivity type formed in the epitaxial layer in a region surrounding the high impurity concentration source region, and including the high impurity concentration source region; and a diffusion region of the second conductivity type formed in a region of the epitaxial layer surrounding the high impurity concentration drain region, and including the high impurity concentration drain region; anda second double diffusion insulated gate field effect transistor comprising in the epitaxial layer of the second conductivity type formed on the semiconductor substrate of the first conductivity type, an impurity well region of the first conductivity type formed in a main surface of the epitaxial layer of the second conductivity type; a source region and a drain region of the first conductivity type, each having a high impurity concentration, formed in the well region, the source and drain regions being separated from each other by a given distance; a body region of the second conductivity type formed in the well region and in a region surrounding the high impurity concentration source region, and including the high concentration source region; and a diffusion region of the first conductivity type formed in the well region and in a region surrounding the high impurity concentration drain region, and including the high impurity concentration drain region.