Patents by Inventor Christopher W. Cline

Christopher W. Cline 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).

  • Ionization test for electrical verification
    Patent number: 7808257
    Abstract: A method and apparatus for the non-contact electrical test of both opens and shorts in electronic substrates. Top surface electrical test features are exposed to an ionization source under ambient conditions and the subsequent charge build up is measured as a drain current by probes contacting corresponding bottom surface features. Opens are detected by an absence of a drain current and shorts are detected by turning off the ionization source and re-measuring the bottom surface probes with a varying bias applied to each probe in the array.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: October 5, 2010
    Assignee: International Business Machines Corporation
    Inventors: Christopher W. Cline, Edward J. Yarmchuk, Vincent A. Arena, Donald A. Merte, Thomas Picunko, Brian J. Wojszynski, Charles J. Hendricks, Michael E. Scaman, Robert S. Olyha, Jr., Arnold Halperin