Patents by Inventor Michael T. Harnischfeger

Michael T. Harnischfeger 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).

  • Apparatus and method of device stripe height control
    Patent number: 6193584
    Abstract: A lapping guide for use in fabrication of a device includes a first resistive element and a second resistive element. The two resistive elements can provide different changing resistances throughout the lapping of the device. These two resistances can be used throughout the lapping of the device to facilitate determination of when a predetermined desired height of the device has been achieved, and therefore stop the lapping of the device. The resistive elements can be physically adjacent to each other or separate from each other. Further, a common lead can be electrically connected to both resistive elements for measuring their respective resistances. In addition, the resistive elements can be separated from each other by the device.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: February 27, 2001
    Assignee: Read-Rite Corporation
    Inventors: Steven C. Rudy, Curtis V. Macchioni, Yong Shen, Billy W. Crue, Jr., Michael T. Harnischfeger, Steven J. Plewes