Patent ID: 7569496

Claim:
A method for manufacturing a SiC semiconductor device comprising: forming an impurity layer in a SiC semiconductor layer; and forming an oxide film on the SiC semiconductor layer, wherein the forming the impurity layer includes: implanting an impurity ion in the SiC semiconductor layer; forming a carbon layer on the SiC semiconductor layer; heating the SiC semiconductor layer for activating the implanted impurity in the SiC semiconductor layer, wherein the SiC semiconductor layer including the impurity layer is covered with the carbon layer; and removing the carbon layer from the SiC semiconductor layer, the forming the carbon layer includes: coating an organic solvent resist on a surface of the SiC semiconductor layer including the impurity layer; reducing atmospheric pressure around the SiC semiconductor layer to be equal to or lower than 1×10 −4 Pa; and heating the organic solvent resist for evaporating organic matter in the organic solvent resist so that the organic solvent resist is carbonized, the heating the organic solvent resist is performed in a temperature range between 200° C. and 850° C., and the forming the oxide film is performed after the removing the carbon layer.