Patent ID: 9224645
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A silicon carbide semiconductor device comprising: a silicon carbide layer; a reaction layer and a conductive oxidation layer which is in contact with the reaction layer, the reaction layer and the conductive oxidation layer being formed by executing the steps in the following order: a conductive layer forming step where a conductive layer is formed on the silicon carbide layer; a heat treatment step where the silicon carbide layer and the conductive layer are made to react with each other thus forming the reaction layer which is in contact with the silicon carbide layer and a silicide layer which is present on the reaction layer; a first plasma ashing step where a carbon component which the silicide layer contains is removed; an etching step where at least a portion of the silicide layer is removed using an acid thus exposing at least a portion of a surface of the reaction layer; and a second plasma ashing step where a carbon component which remains on the reaction layer is removed and a conductive oxidation layer is formed on the reaction layer, and an electrode layer which is formed over the reaction layer with the conductive oxidation layer interposed therebetween.