Patents by Inventor Kenneth James Varker

Kenneth James Varker 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).

  • Method for forming a multilayer printed circuit board
    Patent number: 4030190
    Abstract: Multilayer printed circuit boards are formed by providing a plurality of board assemblies having appropriate ground, signal and voltage planes. Each assembly is built around a dimensionally stable core to enhance registration between levels and is processed in such a manner that there exists a relative dimensionally stable configuration when performing method steps important to maintain good registration. The assemblies may constitute a completed multilayer board or may be subsequently combined to provide a more complex multilayer printed circuit board.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: June 21, 1977
    Assignee: International Business Machines Corporation
    Inventor: Kenneth James Varker