Patents by Inventor Combronde Jacques

Combronde Jacques has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for controlling the oxygen level of silicon rods pulled according to the Czochralski technique
    Patent number: 4417943
    Abstract: A method for controlling the oxygen concentration profile of a rod of crystalline material such as silicon being pulled from a melt in a crucible includes varying the crucible rotation speed during the pulling process. In a preferred embodiment, the average oxygen concentration profile of a rod pulled at a constant crucible rotation speed is measured and then this information is used in growing another rod by controlling the crucible rotation speed during the pulling process so that its slope is opposite to the slope of the measured average oxygen concentration profile.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: November 29, 1983
    Assignee: International Business Machines Corporation
    Inventors: Combronde Jacques, Jean-Claude Felix