Patent ID: 7122875
Filing Date: 2006-10-17
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first semiconductor region of a first conductivity type; a second semiconductor region of a second conductivity type and a third semiconductor region of said first conductivity type having impurity concentration higher than that of said first semiconductor region which are so formed as to sandwich said first semiconductor region; a first insulating film formed on said first semiconductor region; a plurality of first floating field plates formed on said first insulating film, being arranged above said first semiconductor region along a first direction which is a direction from said third semiconductor region towards said second semiconductor region; a second insulating film formed on said first floating field plates; a plurality of second floating field plates formed on said second insulating film, being arranged above said first semiconductor region along said first direction; a third insulating film formed on said second floating field plates; and a plurality of third floating field plates formed on said third insulating film, being arranged above said first semiconductor region along said first direction.