Patents by Inventor David Erdmann

David Erdmann 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).

  • Publication number: 20050075049
    Abstract: By applying heat and pressure to a backing film with an adhesive layer while mounting it to a polish head used for chemical mechanical polishing, inhomogeneities inside the adhesive layer, e.g. thickness and compressibility variations or air bubbles can easily be removed. A corresponding configuration includes a device for exerting a uniform pressure force, which can be a roller made of silicone or rubber, or a plate. The configuration also includes a device for heating and a control unit for controlling the heat and the pressure force. After the backing film is installed using this configuration and method, the polish head can be used to uniformly remove material from a semiconductor wafer surface and therefore the wafer yield is advantageously increased.
    Type: Application
    Filed: June 16, 2003
    Publication date: April 7, 2005
    Inventors: Katrin Ebner, David Erdmann, Walter Glashauser, Lutz Teichgraber