Patent ID: 7329614
Filing Date: 2008-02-12
Classification: H01L

Abstract:
1. A method of manufacturing an ohmic electrode, comprising: forming a high-concentration impurity region in an area at a surface of an SiC substrate by implanting conductive impurities into the area; forming an insulating film over the surface of the SiC substrate including the high-concentration impurity region; opening a contact hole through the insulating film, to expose a surface of the high-concentration impurity region; arranging a conductive thermal reaction raw material in the contact hole over the surface of the high-concentration impurity region; forming a thermally-reacted layer from the thermal reaction raw material by heat-treating the SiC substrate in a non-oxidizing atmosphere, the thermally-reacted layer being conductive and interposed between the thermal reaction raw material and the high-concentration impurity region; forming a plug by filling the contact hole with a conductive material up to the surface of the insulating film, the plug preventing the diffusion of metal atoms of a metal wiring; and forming the metal wiring to cover the plug.