Patents by Inventor Anthony R. T. Lefkow

Anthony R. T. Lefkow 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 and apparatus for evaporation arc stabilization for non-permeable targets utilizing permeable stop ring
    Patent number: 4600489
    Abstract: Apparatus and method for evaporation arc stabilization including a target having a surface of material of non-permeable material to be evaporated; circuitry for establishing an arc on the target surface for evaporating the target material, the arc being characterized by the presence of charged particles and a cathode spot which randomly migrates over the target surface; and a confinement ring surrounding the target surface, the ring being composed of a magnetically permeable material to thereby confine the cathode spot to the target surface.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: July 15, 1986
    Assignee: VAC-TEC Systems, Inc.
    Inventor: Anthony R. T. Lefkow