Patent ID: 9647072
Date: 2017-05-09
CPC Classifications: H01L

Claim:
1. A silicon carbide semiconductor device, comprising: a silicon carbide substrate including a first impurity region having a first conductivity type, a well region being in contact with said first impurity region and having a second conductivity type which is different from said first conductivity type, and a second impurity region being separated from said first impurity region by said well region and having said first conductivity type; a gate insulating film being in contact with said first impurity region and said well region; and a gate electrode being in contact with said gate insulating film and being arranged opposite said to said well region with respect to said gate insulating film, a specific on-rsistance at a voltage which is half a gate driving voltage applied to said gate electrode being smaller than twice said specific on-resistance at said gate driving voltage, wherein a surface of said well region in contact with said gate insulating film includes a first plane having a plane orientation of {0-33-8} microscopically and a second plane having a plane orientation of {0-11-1} microscopically, said first plane and said second plane of said surface constituting a complex plane having a plane orientation of {0-11-2}.