Patent ID: 7109521
Filing Date: 2006-09-19
Classification: H01L,Y10S

Abstract:
1. A silicon carbide semiconductor structure comprising: a silicon carbide substrate having an off-axis orientation toward a predetermined crystallographic direction and including a plurality of first features in a surface thereof, the plurality of first features including at least one first sidewall that is oriented nonparallel to the predetermined crystallographic direction; 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 and including a plurality of second features in a surface thereof that is remote from the silicon carbide substrate, the plurality of second features including at least one second sidewall that is oriented nonparallel to the predetermined crystallographic direction; and a second epitaxial silicon carbide layer on the surface of the first epitaxial silicon carbide layer that includes the plurality of second features therein and that is thicker than a depth of the at least one second sidewall.