Patents by Inventor Craig Alan Roderick

Craig Alan Roderick 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).

  • Apparatus for directly measuring component values within an RF circuit
    Patent number: 5872456
    Abstract: Apparatus for directly measuring the value of a component within an RF circuit (e.g., an RF matching network within a semiconductor wafer processing system). Specifically, the apparatus applies a low frequency signal (e.g., a 1 KHz) across one or more of the components within an RF circuit using a bridge circuit that is sufficiently isolated from the RF signal to accomplish accurate measurements of the component. The apparatus monitors the amplitude of the low frequency signal across the component. The amplitude of the low frequency signal is indicative of the value of the component.
    Type: Grant
    Filed: May 23, 1997
    Date of Patent: February 16, 1999
    Assignee: Applied Materials, Inc.
    Inventors: Craig Alan Roderick, Viktor Shel