Patents by Inventor Richard C. Krauchune

Richard C. Krauchune 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).

  • Melt depth control for semiconductor materials grown from a melt
    Patent number: 6200383
    Abstract: The invention features a method of controlling the depth of a melt for or crystal growth. According to the method, an input signal is applied through a crucible and a material disposed within the crucible. An output signal generated in response to the input signal is measured. The output signal relates to the depth of the melt. An amount of the source material introduced into the melt is adjusted to maintain the depth of the melt at a substantially constant level using the output signal.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: March 13, 2001
    Assignee: Evergreen Solar, Inc.
    Inventors: Richard L. Wallace, Jr., Richard C. Krauchune