Patents by Inventor Erno H. Klaassen

Erno H. Klaassen 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).

  • Precision capacitor array
    Publication number: 20080122670
    Abstract: A digital capacitor array with individually shielded unit capacitors and combination binary—thermometer coded addressing is disclosed. Such a capacitor array may be part of a digitally controlled oscillator in a MEMS-based frequency reference.
    Type: Application
    Filed: November 29, 2006
    Publication date: May 29, 2008
    Inventor: Erno H. Klaassen
  • Suspended single crystal silicon structures and method of making same
    Patent number: 5600174
    Abstract: Temperature-sensitive transducers and other circuitry are manufactured by an electrochemical post-processing etch on an integrated circuit fabricated using a conventional CMOS process. Tetramethyl ammonium hydroxide or another anisotropic etchant having similar characterisics is used to selectively etch exposed front-side regions of a p-type silicon substrate, leaving n-type wells suspended from oxide beams. Circuits in the n-wells are thermally and electrically insulated from the substrate.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: February 4, 1997
    Assignee: The Board of Trustees of the Leeland Stanford Junior University
    Inventors: Richard J. Reay, Erno H. Klaassen