Patents by Inventor Cornelia Kumann

Cornelia Kumann 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 and device for cutting single crystals, in addition to an adjusting device and a test method for determining a crystal orientation
    Patent number: 7137865
    Abstract: A method for the division of single crystals, in particular of GaAs, is provided in which a single crystal (1) to be cut into at least two parts and a cutting tool (2, 3; 8, 8a, 8b, 8c) are moved relative to one another in a direction of advancement (V) and wherein the single crystal (1) is oriented in such a way that a specified crystallographic orientation (K) lies in the cutting plane (T), characterized in that an angle (?) between the specified crystallographic direction (K) and the direction of advancement (V) is chosen in such a way that forces which act on the cutting tool during cutting in a direction at right angles to the cutting plane compensate one another.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: November 21, 2006
    Assignee: Freiberger Compound Materials GmbH
    Inventors: Ralf Hammer, André Kleinwechter, Tilo Flade, Cornelia Kumann, Ralf Gruszynsky
  • Method and device for cutting single crystals, in addition to an adjusting device and a test method for determining a crystal orientation
    Publication number: 20040118338
    Abstract: A method for the division of single crystals, in particular of GaAs, is provided in which a single crystal (1) to be cut into at least two parts and a cutting tool (2, 3; 8, 8a, 8b, 8c) are moved relative to one another in a direction of advancement (V) and wherein the single crystal (1) is oriented in such a way that a specified crystallographic orientation (K) lies in the cutting plane (T), characterised in that an angle (&rgr;) between the specified crystallographic direction (K) and the direction of advancement (V) is chosen in such a way that forces which act on the cutting tool during cutting in a direction at right angles to the cutting plane compensate one another.
    Type: Application
    Filed: April 18, 2003
    Publication date: June 24, 2004
    Inventors: Ralf Hammer, Andre Kleinwechter, Tilo Flade, Cornelia Kumann, Ralf Gruszynsky