Patent ID: 7692241
Filing Date: 2010-04-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first conductive type substrate; a super junction layer disposed on the substrate and including a plurality of first conductive type first regions and a plurality of second conductive type second regions, the first and second regions being alternately arranged in a plane direction of the substrate; a second conductive type channel layer formed to a surface portion of the super junction layer; a plurality of trench gate structures, each of which includes a trench, a gate insulating layer, and a gate electrode, the trench penetrating through the channel layer and reaching a corresponding one of the plurality of first regions of the super junction layer, the gate insulating layer being disposed on an inner wall of the trench, the gate electrode being disposed in the trench through the gate insulating layer; a first conductive type source region formed to a surface portion of the channel layer and located near an outer side wall of the trench; a second conductive type third region formed to the surface portion of the channel layer and located between adjacent source regions, the third region having an impurity concentration greater than an impurity concentration of the channel layer; and a second conductive type body region formed to the channel layer between adjacent trench gate structures and being in contact with the third region.