Patent ID: 6534026
Filing Date: 2003-03-18
Classification: C01B,C30B,Y10S,Y10T

Abstract:
A silicon carbide material, comprising:a single crystal silicon carbide seed crystal, said single crystal silicon carbide seed crystal having a first density of defects, said defects comprised of micropipes and dislocations; an axial region of re-crystallized silicon carbide, said axial region grown off of said single crystal silicon carbide seed crystal, said axial region having a second density of defects, said defects comprised of micropipes and dislocations; and a lateral region of re-crystallized silicon carbide, said lateral region grown off of said single crystal silicon carbide seed crystal, said lateral region having a third density of defects, said defects comprised of micropipes and dislocations, wherein said third defect density is less than said first defect density and less than said second defect density, and wherein said third defect density is less than 104 per square centimeter.