PRODUCTION OF SINGLE CRYSTAL

摘要

PURPOSE:To provide a method for producing a high quality single crystal by the Bridgman method by which the occurrence of crystal defects such as bubbles, cell growth and striae can be prevented. CONSTITUTION:When a single crystal is grown by the Bridgman method while transferring a crucible contg. a melt and a crystal to be grown from a high temp. part to a low temp. part, the rate of transfer of the crucible is varied from the beginning of crystal growth to the end so that the rate of growth of the crystal in the crucible is made always constant.