Patent ID: 6524894
Filing Date: 2003-02-25
Classification: H01L

Abstract:
A semiconductor device comprising:a first diffusion region of a second conductivity type formed on a surface of a semiconductor substrate of a first conductivity type; a second diffusion region of the first conductivity type selectively formed on a surface of the first diffusion region; a gate electrode formed in or on the semiconductor substrate with a gate insulation film interposed therebetween; an emitter electrode electrically insulated from the gate electrode and selectively formed on the semiconductor substrate; an inactive region of the first conductivity type formed on an underside of the semiconductor substrate, the inactive region having incompletely activated ions; an active region of the first conductivity type formed on an underside of the inactive region, the active region having highly activated ions; an anode layer of the second conductivity type formed on an underside of the active region; and a collector electrode formed on an underside of the anode layer.