Patent ID: 6995036

Claim:
A production method of an α-SiC wafer in a method of growing an α-SiC crystal on a substrate by an SiC powder sublimation and recrystallization method, comprising the steps of: setting a β-SiC crystal produced by a CVD method as the substrate and setting a crucible, in which the substrate and an SiC powder raw material are placed to be close to each other, as one unit; stacking a plurality of the units vertically in layers and placing them inside a radiation tube of a dimension higher than height of the multilayer unit; heating the radiation tube by an induction heating coil to uniformly heat-treat the multilayer unit inside the tube, and thereby growing α-SiC phases on a plurality of substrates up to thickness close to product thickness; and thereafter, removing part or an entire of the aforementioned substrates to thereby produce the α-SiC wafers.