Patent ID: 8415671

Claim:
A semiconductor switching device, comprising: a first wide band-gap semiconductor layer having a first conductivity type; a first wide band-gap well region having a second conductivity type that is opposite the first conductivity type on the first wide band-gap semiconductor layer; a second wide band-gap well region having the second conductivity type on the first wide band-gap semiconductor layer; a non-wide band-gap semiconductor layer having the second conductivity type on the first wide band-gap semiconductor layer; a first wide band-gap source/drain region having the first conductivity type on the first wide band-gap well region; a second wide band-gap source/drain region having the first conductivity type on the second wide band-gap well region; a gate insulation layer on the non-wide band-gap semiconductor layer; and a gate electrode on the gate insulation layer, wherein the gate insulation layer directly contacts the first wide band-gap well region.