Patents by Inventor Makoto Morii

Makoto Morii 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).

  • Semiconductor acceleration sensor and method of manufacturing the same
    Patent number: 7107847
    Abstract: A semiconductor acceleration sensor comprises: a frame having an opening inside thereof; flexible beams extending from the frame to the inside of the opening of the frame; a weight suspended from and supported by the beams so that the weight can freely move; piezoresistors to be mounted on the beams and to vary the resistance values in response to accelerations which work on the piezoresistors. The frame comprises damper plate portions, each of which covers a part of the opening spanning from a corner portion of two neighboring sides of the frame on the side of the opening to the inside of the opening, and each of which serves serve as a stopper to limit movement of the weight. The weight has corner portions which face the corner portions, respectively, and each of which is chamfered to have a shape of arc or a polygonal line consisting of at least three sides as seen in plan view.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: September 19, 2006
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Hitoshi Yoshida, Kazushi Kataoka, Hisakazu Miyajima, Sumio Akai, Daisuke Wakabayashi, Koji Goto, Makoto Morii
  • Semiconductor acceleration sensor and method of manufacturing the same
    Publication number: 20040261529
    Abstract: A semiconductor acceleration sensor comprises: a frame having an opening inside thereof; flexible beams extending from the frame to the inside of the opening of the frame; a weight suspended from and supported by the beams so that the weight can freely move; piezoresistors to be mounted on the beams and to vary the resistance values in response to accelerations which work on the piezoresistors. The frame comprises damper plate portions, each of which covers a part of the opening spanning from a corner portion of two neighboring sides of the frame on the side of the opening to the inside of the opening, and each of which serves serve as a stopper to limit movement of the weight. The weight has corner portions which face the corner portions, respectively, and each of which is chamfered to have a shape of arc or a polygonal line consisting of at least three sides as seen in plan view.
    Type: Application
    Filed: June 16, 2004
    Publication date: December 30, 2004
    Applicant: Matsushita Electric Works, Ltd.
    Inventors: Hitoshi Yoshida, Kazushi Kataoka, Hisakazu Miyajima, Sumio Akai, Daisuke Wakabayashi, Koji Goto, Makoto Morii