SINGLE CRYSTAL MANUFACTURING DEVICE AND MANUFACTURING METHOD FOR SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To provide a single crystal manufacturing device capable of suppressing crack occurrence of a single crystal.SOLUTION: A single crystal manufacturing device 1 is configured to manufacture a single crystal 6 by a sublimation recrystallization method, and includes: a crucible 10 which stores a raw material 2 and also holds a seed crystal 5 opposite the raw material 2; a heat insulation material 20 which covers the crucible 10; and a thermometer 72 which measures a temperature of an upper part of the crucible 10 through a first opening 221 and a second opening 231 formed in an upper part of the heat insulation material 20, the second opening 231 having an inner diameter Dwhich is 2/3 or larger of an outer diameter Dof the seed crystal 5 (D≥2/3×D).