Patents by Inventor Hans-Gerhard Dederichs

Hans-Gerhard Dederichs 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).

  • Patent number: 5203980
    Abstract: A large surface cathode arrangement with a consumable cathode plate that is connected via an intermediate plate with high electrical and thermal conductivity to a base plate is provided. The arrangement is provided with cooling channels. Current supply conduits and current supply locations for uniformly distributing the electrical current density and the electrical potential within the cathode plate are furthermore provided which allow the consumption of the cathode plate to become more uniform. Preferably, three or more current supply conduits are connected to a plurality of current supply locations that are uniformly distributed over the base plate. The cooling channels are provided at the face of the intermediate plate which is facing the base plate so that a continuous wall of the intermediate plate is in contact with the cathode plate, thus contributing to the improvement of the current distribution. The cathode arrangement is especially suitable for coating apparatus according to the PVD principle.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: April 20, 1993
    Assignee: Multi-Arc Oberflachentechnik GmbH
    Inventors: Dieter Cremer, Hans-Gerhard Dederichs