Patents by Inventor G. A. Horst Siewert

G. A. Horst Siewert 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).

  • Process and apparatus for sputter coating a gold alloy onto a substrate
    Patent number: 4882022
    Abstract: A process using a multiple-substance alloy having a gold content most preferably in the range of 94 to 98 percent by weight as a target in a cathode sputtering apparatus is disclosed. The alloy further contains non-gold elements of aluminum, copper and preferably an element of the group of Co, Ni, G, Ti, In, Cd, Sn, Fe and Pd.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: November 21, 1989
    Assignees: Leybold Aktiengesellschaft, Demetron Gesellschaft Fuer Elektronik-Werkstoffe mbH
    Inventors: Dieter Hoffman, Wolf-Dieter Munz, G. A. Horst Siewert, Horst Dietrich
  • Multicomponent alloy for sputtering targets
    Patent number: 4466940
    Abstract: A multicomponent alloy for targets employed in the sputter coating of gold layers, said alloy having 35% to 55%, preferably either 50% or 42%, non-aurous alloy components.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: August 21, 1984
    Assignees: Demetron Gesellschaftfur Electronik-Werstoffe mbh, Leybold-Heraeus GmbH
    Inventors: G. A. Horst Siewert, Horst Dietrich, Wolf-Dieter Munz, Jorg Goebel