Patents by Inventor Kevin S. Chang

Kevin S. Chang 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).

  • Probe card stiffener with decoupling
    Patent number: 8736294
    Abstract: A stiffener for a probe card assembly can include decoupling mechanisms disposed within radial arms of the stiffener. The decoupling mechanisms can be compliant in a direction along a radial direction of said radial arm and rigid in a direction perpendicular to said radial arm. The decoupling mechanisms can decouple the stiffener from thermally induced differential radial contraction and expansion of the stiffener relative to the cardholder to which the stiffener is mounted. This can reduce thermally-induced vertical translation of the probe card assembly.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: May 27, 2014
    Assignee: FormFactor, Inc.
    Inventors: Kevin S. Chang, Eric D. Hobbs
  • PROBE CARD STIFFENER WITH DECOUPLING
    Publication number: 20120146679
    Abstract: A stiffener for a probe card assembly can include decoupling mechanisms disposed within radial arms of the stiffener. The decoupling mechanisms can be compliant in a direction along a radial direction of said radial arm and rigid in a direction perpendicular to said radial arm. The decoupling mechanisms can decouple the stiffener from thermally induced differential radial contraction and expansion of the stiffener relative to the cardholder to which the stiffener is mounted. This can reduce thermally-induced vertical translation of the probe card assembly.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Inventors: Kevin S. Chang, Eric D. Hobbs