Patent ID: 6552390
Filing Date: 2003-04-22
Classification: H01L

Abstract:
A semiconductor device comprising:a first conductivity type semiconductor substrate having a first and a second main plane; a first conductivity type semiconductor layer formed on said first main plane of said semiconductor substrate; a MISFET formed in a first surface area of said semiconductor layer, said MISFET having a drain region and a source region selectively formed on said semiconductor layer, and a gate electrode formed on said semiconductor layer between said drain region and said source region through a gate insulator; an internal source electrode formed so as to contact said source region on a top of said semiconductor layer and whose surface is covered with an insulating layer; a diode formed in a second surface area of said semiconductor layer, said diode having a cathode region provided in said semiconductor layer and an anode region provided on said cathode region; an anode electrode formed above said semiconductor layer and contacts said anode region of said diode; a conductive portion which pierces said semiconductor layer so as to electrically connect said internal source electrode of said MISFET and said cathode region of said diode; and a source/cathode electrode formed on said second main plane of said semiconductor substrate and commonly provided as a source electrode of said MISFET and a cathode electrode of said diode.