Patents by Inventor Stephen W. Schmidt

Stephen W. Schmidt 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 maintaining accurate positioning between a probe and a DUT
    Patent number: 7043848
    Abstract: A method and apparatus for keeping a probe accurately positioned relative to a device to be tested. The apparatus having a probe and movable probe station element for positioning the probe at a predetermined test position on the device to be tested. The probe station element being driven by a drive to position the probe at the test position, and having a controller connected thereto for substantially keeping the probe at the test position and inhibiting the probe shifting therefrom. In one form the controller is capable of determining the variance between the current probe position and the desired or predetermined test position, and actuating the drive after the variance has reached a predetermined value.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 16, 2006
    Assignee: The Micromanipulator Company
    Inventors: Kenneth F. Hollman, Stephen W. Schmidt