Patents by Inventor Günther Hraschan

Günther Hraschan 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: 6767170
    Abstract: A wafer holder has a set of minimum contact wafer support members predefining support member contacting portions on a planar wafer surface of a wafer. The wafer chuck has a wafer support region for contacting the planar wafer surface. The wafer support region of the chuck includes recesses configured at predefined positions corresponding to support member contacting portions of the lower wafer surface. The wafer handling system further includes a wafer transport device including a rotational position adjusting device for adjusting the rotational position of a wafer that is transported between the wafer holder and the wafer chuck. Thereby, elevations on the lower wafer surface, like scratches or deposited material which are produced by the contact between the support members and the wafer, are encapsulated by the recesses of the wafer chuck. A method for moving a wafer between a wafer holder and a wafer chuck is also provided.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: July 27, 2004
    Assignee: Infineon Technologies SC300 GmbH & Co. KG
    Inventors: Wolfram Köstler, Günther Hraschan