Patent ID: 9580837
Date: 2017-02-28
CPC Classifications: C30B

Claim:
1. A method for SiC crystal growth by chemical vapor transport with silicon comprising: (a) providing a SiC growth system that includes a silicon carbide seed crystal and solid carbon source material positioned in spaced relation; (b) heating the SiC growth system and introducing into the SiC growth system a gaseous halosilane and a reducing gas, wherein the gaseous halosilane and the reducing gas react in the SiC growth system yielding elemental silicon vapor; (c) reacting the elemental silicon vapor of step (b) with the solid carbon source material of step (a) yielding silicon-bearing and carbon-bearing vapors; (d) transporting the silicon-bearing and carbon-bearing vapors of step (c) to the SiC seed of step (a); and (e) precipitating the silicon-bearing and carbon-bearing vapors of step (c) on the SiC seed of step (a) to grow the silicon carbide single crystal, wherein: the solid carbon source material is comprised of porous carbon in a form of one or more of pellets, spheres, and granules having at least one of the following: a mean grain size of between 0.5 mm and 6 mm; a density between 0.4 g/cm a surface area between 200 m