Patent ID: 8491719

Claim:
A method of production of a silicon carbide single crystal, comprising: sublimation recrystallization of a sublimating material onto a seed crystal comprising silicon carbide in a graphite crucible, thereby growing a single crystal containing an uncompensated impurity in a concentration of at least 1×10 15 /cm 3 and not more than 1×10 17 /cm 3 and containing vanadium in a concentration of less than the concentration of said uncompensated impurity; wherein the difference in concentrations of said uncompensated impurity and said vanadium is such that said single crystal has an electrical resistivity at room temperature of at least 1.19×10 10 Ωcm, wherein the graphite crucible has a nitrogen concentration of not more than 50 ppm as measured by an inert gas fusion thermal conductivity method, and the sublimating material comprises a mixture of silicon carbide and vanadium or a mixture of silicon carbide and a vanadium compound.