Patent ID: 8642476

Claim:
A method for manufacturing a silicon carbide semiconductor device, comprising the steps of: preparing a silicon carbide semiconductor including a first surface having at least a portion into which an impurity is implanted; forming a second surface thereof by cleaning said first surface of said silicon carbide semiconductor; forming a silicon-containing film on said second surface; and forming a first oxide film constituting the silicon carbide semiconductor device, by oxidizing said silicon-containing film, wherein said first oxide film is a gate oxide film, said first surface being cleaned by means of at least one of a dry etching process employing a mixed gas of hydrogen gas and hydrogen chloride gas, which is contained in the mixed gas at a content (the hydrogen chloride gas/(the hydrogen chloride gas+the hydrogen gas)×100) of 10% or smaller, and a process for forming a second oxide film on said first surface using at least one of a solution containing oxygen, thermal oxidation in an atmosphere containing oxygen gas, and oxygen plasma, and then removing said second oxide film.