Patents by Inventor Christian W. Sturm

Christian W. Sturm 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).

  • Resistive laminate for printed circuit boards, method and apparatus for forming the same
    Patent number: 5039570
    Abstract: A relatively large dimensioned sputter coated resistive laminate providing uniform laminate dimensions and resistance tolerances over the surface area thereof and a method for making the laminate from a foil, including a platten support step and a sputter etching or cleaning step. The laminate comprises a sputter coated metal foil which is isostatically bonded to an insulative, epoxy resin substrate. In a preferred construction a nickel-chrome-aluminum-silicon resistive layer is applied to a copper foil.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 13, 1991
    Assignee: Planar Circuit Technologies, Inc.
    Inventor: Christian W. Sturm