Patents Assigned to Wacker-Chemitronic Gesellschaft fuer Eletronik-Grundstoffe mbH
  • Method for pulling a silicon single crystal
    Patent number: 5487354
    Abstract: A method for pulling a silicon single crystal has the single crystal being pulled at a speed defined as maximum pulling speed in the vertical direction with respect to a silicon melt held in a crucible. The value of the maximum pulling speed is approximately proportional to the axial temperature gradient in the growing single crystal.
    Type: Grant
    Filed: December 5, 1994
    Date of Patent: January 30, 1996
    Assignee: Wacker-Chemitronic Gesellschaft fuer Eletronik-Grundstoffe mbH
    Inventors: Wilfried von Ammon, Erich Dornberger, Hans Oelkrug, Peter Gerlach, Franz Segieth