Patents by Inventor Marc A. Even

Marc A. Even 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 controlling common mode impedance in disk drive head suspensions
    Patent number: 6762913
    Abstract: A method of adjusting the common mode impedance while enabling maintenance of the differential mode impedance of a pair of traces located with respect to a ground plane formed by a load beam or trace assembly of a disk drive head suspension. The method includes forming a ground plane having apertures with isolated conductive islands in the apertures for setting a desired common mode impedance. The method includes a cut and try approach using sample coupons to adjust the ratio of backed area to island area to adjust the common mode impedance while maintaining the differential mode impedance by maintaining the ratio of unbacked area to the sum of the backed and island areas.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: July 13, 2004
    Assignee: Hutchinson Technology Inc.
    Inventors: Marc A. Even, Larry C. Webb, Jr.
  • Apparatus and method for controlling common mode impedance in disk drive head suspensions
    Patent number: 6714385
    Abstract: Apparatus and method of adjusting the common mode impedance while enabling maintenance of the differential mode impedance of a pair of traces located with respect to a ground plane formed by a load beam or trace assembly of a disk drive head suspension. The ground plane has apertures with isolated conductive islands in the apertures for setting a desired common mode impedance. The method includes a cut and try approach using sample coupons to adjust the ratio of backed area to island area to adjust the common mode impedance while maintaining the differential mode impedance by maintaining the ratio of unbacked area to the sum of the backed and island areas.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: March 30, 2004
    Assignee: Hutchinson Technology Inc.
    Inventors: Marc A. Even, Larry C. Webb, Jr.