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  • Patent number: 7500392
    Abstract: The invention is a solid state microanemometer and a method of making thereof. Specifically, the invention relates to a microanemometer including an electrically conductive resistor in the form of a semiconductor wafer doped with an impurity having an upper surface, a lower surface having a peripheral edge; a substrate bonded to the semiconductor wafer having an upper surface, a cavity having a peripheral edge and a peripheral margin defined on the upper surface and bounded by the peripheral edge of the cavity wherein the lower surface of the semiconductor wafer rests on and is supported by at least part of the peripheral edge of the cavity such that the semiconductor wafer is over the cavity; and a means for electrically connecting the resistor to a current source. The microanemometer also includes a plurality of metal conductors in contact with the resistor.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: March 10, 2009
    Assignee: Memsys, Inc.
    Inventors: Thomas E. Plowman, Warren R. Jewett