Patent ID: 9117681
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A silicon carbide semiconductor element comprising: an n-type silicon carbide substrate or a silicon carbide substrate having an n-type silicon carbide region in a surface region thereof; a nickel silicide film formed directly on a surface of the n-type silicon carbide substrate or directly on a surface of the n-type silicon carbide region of a silicon carbide substrate; a nickel aluminum film having a thickness in a range of 5 nm to 20 nm formed on the nickel silicide film and having a composition of 50% nickel and 50% aluminum in order to enhance adhesiveness between the nickel silicide film and the aluminum film and to prevent the resistance of the nickel aluminum film from rising; and an aluminum film having a thickness in a range of 2 μm to 4 μm formed on a surface of the nickel aluminum film the nickel silicide film being formed by heat treatment of a nickel film on the n-type silicon carbide substrate or the silicon carbide substrate having an n-type silicon carbide region, the nickel silicide film having a thickness in a range of 0.05 μm to 4 μm.