Patents by Inventor Douglas A. Asbury

Douglas A. Asbury 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).

  • System and method for accelerated degradation testing of semiconductor devices
    Patent number: 5381103
    Abstract: A method of testing a semiconductor device, having the steps of pulsing the semiconductor device with a predetermined level of current for a duration of time so as to cause inadequate parts to degrade and to cause adequate parts to stabilize, and measuring predetermined electrical or optical performance characteristics for the semiconductor device after the current pulse. A system for testing a semiconductor device on a wafer is also provided having a contact probe for applying current pulses to the semiconductor device on the wafer, measuring means electrically connected to the probe for measuring predetermined electrical or optical performance characteristics of the semiconductor device on the wafer, and optical detection means electrically connected to the measuring means for detecting radiation emitted from the semiconductor device on the wafer.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: January 10, 1995
    Assignee: Cree Research, Inc.
    Inventors: John A. Edmond, Douglas A. Asbury, Calvin H. Carter, Jr., Douglas G. Waltz