Patent ID: 7538388
Filing Date: 2009-05-26
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; a first-conductivity-type drift region formed in said semiconductor substrate; a plurality of second conductivity type base regions formed in an upper part of said first-conductivity-type drift region; and a plurality of second-conductivity-type partition regions formed beneath said second-conductivity-type base region and arranged in said first-conductivity-type drift region, said second-conductivity-type partition regions being periodically formed in said first-conductivity-type drift region at a specified distance, and S wherein each of said second-conductivity-type partition regions has a columnar form, aligned in the thickness-wise direction of said semiconductor substrate, and two-dimensionally arranged in a plan view, and wherein said second-conductivity-type partition regions are provided as being arranged according to a rhombic lattice pattern in a plan view.