Patents by Inventor William Robert Caldwell

William Robert Caldwell 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).

  • Patent number: 10267845
    Abstract: A system for simultaneously burning in, testing and curing all the die on an uncut semiconductor wafer having top and bottom surfaces, the system having upper and lower platen assemblies with a flow section configured to receive and discharge a temperature-controlled, circulated liquid heat transfer medium to maintain the temperatures of the top and bottom surfaces of the uncut semiconductor wafer within desired limits during wafer burn-in and testing and a programmable CPU and service controller configurable to selectively energize, monitor, test, display and store a plurality of performance parameters for the electronic circuitry of each of the plurality of die of the uncut semiconductor wafer simultaneously throughout a desired burn-in and test period.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: April 23, 2019
    Assignee: Delta V Instruments, Inc.
    Inventors: Robert W. Storey, William Robert Caldwell, Clint D. Wilson, Glenn Lee Prince, Stephen Kyle Collins, Michael S. Walker, Kerry F. Cage
  • Publication number: 20180328978
    Abstract: A system for simultaneously burning in, testing and curing all the die on an uncut semiconductor wafer; for establishing electrical connectivity in one-to-one correspondence between each die and a specific current amplifier, for monitoring, displaying, evaluating and recording test parameters in relation to preset parametric limits during a requisite test period; and for shutting down any individual die that exceeds the preset parametric limits. Methods of use and subsystems for raising and lowering a semiconductor wafer in relation to a pin chuck and for controlling wafer temperature by circulating a liquid heat exchange medium through platen assemblies disposed above and below the wafer are also disclosed.
    Type: Application
    Filed: May 12, 2017
    Publication date: November 15, 2018
    Inventors: Robert W. Storey, William Robert Caldwell, Clint D. Wilson, Glenn Lee Prince, Stephen Kyle Collins, Michael S. Walker, Kerry F. Cage