Patent ID: 6573144
Filing Date: 2003-06-03
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device, comprising:forming a first conductive type region on a surface layer part of a semiconductor layer; forming a oxide film on a part of said first conductive type region and a part of said semiconductor layer containing said first conductive type region; forming a gate insulating film on said semiconductor layer; forming a gate electrode on said gate insulating film; forming a second conductive type base region on a surface layer part of said semiconductor layer by using said gate electrode as a mask; forming a second conductive type contact region whose concentration is higher than that of said base region within said base region; forming a first conductive type source region within said base region and forming a first conductive type drain region whose concentration is higher than that of said first conductive type region within said first conductive type region; forming an interlayer insulating film on said substrate that covers the gate electrode; forming a source electrode electrically connected with said source region and said contact region; and forming a drain electrode electrically connected with said drain region.