Patent ID: 7759696
Filing Date: 2010-07-20
Classification: H01L

Abstract:
1. A high-breakdown voltage semiconductor switching device comprising: a resurf region of a second conductivity type formed in a surface portion of a semiconductor substrate of a first conductivity type; a base region of the first conductivity type formed in said semiconductor substrate to be adjacent to said resurf region; an emitter/source region of the second conductivity type formed in said base region to be spaced from said resurf region; a gate insulating film formed over said base region to cover a portion of said emitter/source region and a portion of said resurf region; a gate electrode formed on said gate insulating film; a drain region of the second conductivity type formed in said resurf region to be spaced from said base region; a collector region of the first conductivity type formed in said resurf region to be spaced from said base region; a collector/drain electrode formed on said semiconductor substrate and electrically connected to said collector region and said drain region; and an emitter/source electrode formed on said semiconductor substrate and electrically connected to said base region and said emitter/source region, wherein each of said collector region and said drain region includes a plurality of sections separated from one another, said sections of said collector region and said sections of said drain region are alternately arranged to be in contact with one another along a vertical direction to a direction extending from said collector region toward said emitter/source region, said drain region is in direct contact with said resurf region, and said base region is in direct contact with said semiconductor substrate of the first conductivity type.