Power semiconductor device

摘要

In a semiconductor device having a first terminal 101 (source terminal) and a second terminal 102 (drain terminal), the substrate main surface of a semiconductor chip is on the (110) face, the main contact face of an n-type region 2 and a p-type region 4 is the {111} face perpendicular to the (110) face, elongated n-type regions 2 and elongated p-type regions 4 which are arranged alternately and adjacently form a voltage holding area, said first terminal 101 is connected to said p-type regions through wiring, and said second terminal 102 is connected to said n-type regions 2. Also, said p-type region is formed to cover the bottom corners of a gate polycrystalline silicon layer 8.