Patent ID: 8674402
Filing Date: 2014-03-18
Classification: H01L

Abstract:
1. A power semiconductor device comprising: a drain region of a first conductive type; a drift region of the first conductive type formed on the drain region; a first body region of a second conductive type formed below an upper surface of the drift region; a second body region of the second conductive type formed below the upper surface of the drift region and in the first body region, and formed to have a depth shallower than a depth of the first body region; a third body region of the second conductive type formed by protruding downwards from a lower end of the first body region to a position shallower than that of an upper surface of the drain region; a source region of the first conductive type formed below the upper surface of the drift region and in the first body region, and formed to have a depth shallower than a depth of the second body region; a gate insulating layer formed on channel regions of the first body region and on the drift region between first body regions; a gate electrode formed on the gate insulating layer; a source electrode electrically connected to the source region; and a drain electrode electrically connected to the drain region.