Patent ID: 9587327
Date: 2017-03-07
CPC Classifications: C30B

Claim:
1. A method of producing a SiC single crystal by causing a SiC seed crystal to touch a melt containing Si having a temperature gradient inside the melt in a graphite crucible wherein the temperature of the melt decreases from the inside toward the melt surface to thereby cause growth of the SiC single crystal on the SiC seed crystal, the method comprising: (a) making said SiC seed crystal touch the melt while continuously increasing the temperature of the melt to a peak temperature higher than the temperature at the time of touch and also higher than the temperature for causing growth, without holding the temperature at the time of touch, and (b) lowering the temperature of the melt previously risen during (a) to the temperature for causing growth and holding the lowered temperature of the melt so as to grow the SiC single crystal, wherein a shaft which holds the SiC seed crystal is heated to reduce or reverse the temperature gradient from the inside of the melt toward the melt surface while the temperature of the melt is raised after the seed touch.