Patents by Inventor William R. Usry

William R. Usry 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).

  • Calibration of non-vibrating contact potential difference measurements to detect surface variations that are perpendicular to the direction of sensor motion
    Patent number: 7752000
    Abstract: A method and system for determining the contact potential difference of a wafer surface using a non-vibrating contact potential difference probe and a vibrating contact potential difference probe. The method and system involves scanning the wafer surface with a non-vibrating contact potential difference sensor, integrating and scaling the resulting data, and applying offsets to individual tracks of data to match the integrated scaled data to measurements made using a vibrating contact potential difference sensor.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: July 6, 2010
    Assignee: QCept Technologies, Inc.
    Inventors: Mark A. Schulze, William R. Usry
  • Calibration of non-vibrating contact potential difference measurements to detect surface variations that are perpendicular to the direction of sensor motion
    Publication number: 20090276176
    Abstract: A method and system for determining the contact potential difference of a wafer surface using a non-vibrating contact potential difference probe and a vibrating contact potential difference probe. The method and system involves scanning the wafer surface with a non-vibrating contact potential difference sensor, integrating and scaling the resulting data, and applying offsets to individual tracks of data to match the integrated scaled data to measurements made using a vibrating contact potential difference sensor.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 5, 2009
    Inventors: Mark A. Schulze, William R. Usry