Patent ID: 9732438
Date: 2017-08-15
CPC Classifications: C30B,H01B

Claim:
1. A method for the production of at least one SiC volume monocrystal with a specific electrical resistance of at least 10 5 Ωcm, the method comprising: a) producing an SiC growth gas phase in at least one crystal growing area of a growth crucible and growing the SiC volume monocrystal by deposition from the SiC growth gas phase; b) supplying the SiC growth gas phase from an SiC source material that is located in an SiC supply area inside the growth crucible, wherein material is transported from the SiC supply area to a growth boundary surface of the growing SiC volume monocrystal; c) supplying vanadium as a doping agent of the growing SiC volume monocrystal to the crystal growing area; d) setting a growing temperature of at least 2250° C. at the growth boundary surface of the growing SiC volume monocrystal, to grow the SiC volume monocrystal doped with a vanadium doping agent concentration of more than 5·10 e) setting the transport of material from the SiC supply area to the growth boundary surface in addition to the temperature conditions in the growth crucible by way of an additional transport influencing measure, so that the growing temperature at the growth boundary surface and the transport of material to the growth boundary surface is influenced substantially independently of one another, the additional transport influencing measure including providing the SiC source material in the SiC supply area in the form of a powdered SiC material with a specific density in a range between 0.8 g/cm