DEVICE FOR CRYSTAL GROWTH AND METHOD

PURPOSE:To make it possible to dissolve a raw material in melt in response to an amount of crystal growth and to grow crystal with uniform composition, by setting a shaft for charging the raw material besides a shaft for pulling up crystal. CONSTITUTION:Growth weight of the growth crystal 3 per time is measured by the weight sensor 7, the shaft 2 for charging a raw material is dropped in response to the growth weight to dissolve the raw material 4. A dissolution amount per time is measured by the weight sensor 8, to control the transfer speed of the shaft 2. In this manner, the composition of the crystal 3 growing from the melt 5 is always kept constant and, since the composition of the crystal growing from the melt becomes constant, crystal uniform with respect to composition can be grown. In doping of impurities, doping can be carried out in a constant concentration based on the similar principle. Further by this device, since the raw material can be always charged in parallel with crystal growth, the device and process can be used for semicontinuous large-sized crystal growth.