Patent ID: 9472635
Filing Date: 2016-10-18
CPC Classification: H01L

Claim Text:
1. A silicon carbide semiconductor device comprising: a silicon carbide substrate; a main electrode directly provided on said silicon carbide substrate; a first barrier layer provided on said main electrode, said first barrier layer being made of a conductive material containing no aluminum; an interconnection layer provided on said first barrier layer, said interconnection layer being separated from said main electrode by said first barrier layer, said interconnection layer being made of a material containing aluminum; a gate electrode provided on said silicon carbide substrate; an interlayer insulating film provided on said gate electrode to provide insulation between said gate electrode and said interconnection laver, said interlayer insulating film having a contact hole, said main electrode being in contact with said silicon carbide substrate in said contact hole; and a second barrier layer directly provided on said interlayer insulating film, said second barrier layer separating said interlayer insulating film and said main electrode from each other, said second barrier layer being made of a material different from a material containing aluminum, wherein said first barrier layer includes a portion located between said interconnection layer and said interlayer insulating film, and wherein said first barrier layer has a multilayer structure.