WERKWIJZE VOOR DE VERVAARDIGING VAN ZEER ZUIVERE MONOKRISTALLEN DOOR HET TREKKEN UIT EEN KROES VOLGENS CZOCHRALSKI.

摘要

In the crucible-pulling of crystalline rods by the Czochralski technique, pulling plants that operate with a radiation screen offer a number of advantages. This process is optimized according to the invention by the use of a radiation screen which is joined to a lifting and pivoting mechanism that can be operated throughout the entire pulling process, and which is brought into position above the melt only when the contents of the crucible have been melted.