Patent ID: 7226805

Claim:
A method of fabricating an epitaxial silicon carbide layer comprising: forming a plurality of first features in a surface of a silicon carbide substrate having an off-axis orientation toward a predetermined crystallographic direction, the plurality of first features including at least one first sidewall that is oriented nonparallel to the predetermined crystallographic direction; growing a first epitaxial silicon carbide layer on the surface of the silicon carbide substrate that includes the plurality of first features therein, the first epitaxial silicon carbide layer being thicker than a depth of the at least one first sidewall; forming a plurality of second features in a surface of the first epitaxial layer, the plurality of second features including at least one second sidewall that is oriented nonparallel to the predetermined crystallographic direction; and growing a second epitaxial silicon carbide layer on the surface of the first epitaxial layer that includes the plurality of second features therein, the second epitaxial silicon carbide layer being thicker than a depth of the at least one second sidewall.