Patents by Inventor David Krus, Jr.

David Krus, Jr. 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).

  • Manufacture of fine-grained electroplating anodes
    Patent number: 6627055
    Abstract: A continuously cast copper ingot is made by a procedure in which turbulence is imparted to the metal/solid interface during the casting operation. The ingot is then hot worked to form a billet having a smaller average grain size and a larger diameter than possible in the past. The billet is especially useful for making electroplating anodes used in the damascene process for making copper interconnects in silicon wafers.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: September 30, 2003
    Assignee: Brush Wellman, Inc.
    Inventors: William J. Bishop, David Krus, Jr.