Patent ID: 6278155
Filing Date: 2001-08-21
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate;a semiconductor layer of a first conductivity type disposed on the semiconductor substrate;a channel well region of a second conductivity type selectively disposed in a surface region of the semiconductor layer;a first source region of the first conductivity type selectively disposed within the channel well region;a gate insulation layer formed on a surface portion of the channel well region;a gate electrode disposed over the surface portion of the channel well region with the gate insulation layer interposed therebetween;a second source region of the first conductivity type disposed within the channel well region to be connected to the first source region, having an impurity concentration higher than that of the first source region;a source electrode contacting the second source region to be insulated from the gate electrode; anda drain electrode which current is conducted between with the source electrode through the second source region, the first source region, the channel well region and the semiconductor layer.