Patent ID: 8716129

Claim:
A method for manufacturing a silicon carbide semiconductor device, comprising the steps of: preparing a silicon carbide substrate; forming a silicon dioxide film on said silicon carbide substrate; and forming an electrode containing Al and Ti to make contact with said silicon carbide substrate and said silicon dioxide film, the step of forming said electrode including the steps of forming a metal film containing Al and Ti on said silicon carbide substrate, and heating said metal film, the step of heating said metal film having the steps of increasing temperature of said metal film from a temperature of less than 300° C. to a temperature of not less than 300° C. and not more than 450° C. with a first temperature gradient, holding said metal film within a temperature range of not less than 300° C. and not more than 450° C. with a second temperature gradient, after the step of increasing the temperature of said metal film, and increasing the temperature of said metal film to a temperature of not less than 500° C. with a third temperature gradient, after the step of holding said metal film, said second temperature gradient being smaller than said first temperature gradient and said third temperature gradient.