Single-crystal rod and process for its production

摘要

A single-crystal rod, obtained using CZ crucible pulling, has a crystal cone and a cylindrical single-crystal rod, and the crystal cone has an apex angle of 30° to 90°. There is also a process for producing dislocation-free single-crystal rods using CZ crucible pulling in which a seed crystal is immersed in a melt and is pulled out again, and a cone with an apex angle of from 30° to 90° is pulled.