Patent ID: 9224860
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a first conductive type semiconductor layer; a second conductive type base region disposed in an upper part of said semiconductor layer; a gate electrode penetrating said base region and disposed into a lattice shape in a planar view, said gate electrode dividing said semiconductor layer into a plurality of blocks disposed into a matrix shape; a gate insulating film disposed on a side surface and a bottom surface of said gate electrode; a first conductive type source region disposed in an upper part of said base region and contacting with said gate electrode via said gate insulating film; a source electrode connected to said source region and said base region; and a first protective diffusion layer of the second conductivity type disposed between said semiconductor layer and said gate insulating film at a position lower than said gate insulation film, and a second protective diffusion layer of the second conductivity type disposed in a protective contact region located in at least one block of said plurality of said blocks; wherein said first and second protective diffusion layers are in direct physical contact with each other via a second conductivity type region; and said source electrode penetrates, in said protective contact region, said base region to be directly physically connected to said second protective diffusion layer.