Patents by Inventor Howard Edwin Evans

Howard Edwin Evans 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: 5844168
    Abstract: A ball grid array (BGA) package is provided in which the stiffener of the BGA may also be utilized as a conductive layer. A TAB tape is adhered to the stiffener by an adhesive and both the TAB tape and the adhesive may have vias which open to the stiffener. Conductive plugs which may be formed of solder paste, conductive adhesives, or the like may then be filled in the vias to provide electrical connection from the TAB tape to the stiffener. The vias may be located adjacent to solder ball locations. The TAB tape may include multiple conductor layers or multiple layers of single conductive layer TAB tape may be stacked upon each other to provide additional circuit routing. Further, the TAB tape layers may also be combined with the use of metal foil layers.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: December 1, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Randolph Dennis Schueller, John David Geissinger, Anthony Raymond Plepys, Howard Edwin Evans