Patent ID: 6890600

Claim:
An SiC wafer having an epitaxial film obtained by a method including N steps of growth, wherein N is a natural number equal to two or greater, wherein each growth step is expressed in an n growth step, wherein n is an ordinal number corresponding to a natural number from one to N, wherein the method comprises steps of: forming a first seed crystal from a crude SiC single crystal such that a plane having an inclination of 20 degrees or smaller from a {1-100} plane of the crude SiC single crystal or an inclination of 20 degrees or smaller from a {11-20} plane of the crude SiC single crystal is exposed as a first growth surface at a first growth step, at which n=1; forming a first grown crystal by growing an SiC single crystal on the first growth surface at the first growth step; forming an n seed crystal from an (n−1) grown crystal such that an n growth surface has an inclination of 45 to 90 degrees from an (n−1) growth surface and an inclination of 60 to 90 degrees from a {0001} plane of the (n−1) grown crystal at a sequential growth step, at which n=2, 3, . . . , or N; forming an n grown crystal by growing an SiC single crystal on the n growth surface at the sequential growth step; forming an SiC single crystal wafer from an N grown crystal such that a film deposition surface is exposed at a film deposition step; and forming an epitaxial film on the film deposition surface at the film deposition step.