Patents by Inventor Ikuya Kawakita

Ikuya Kawakita 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).

  • Magnetoresistive sensor device
    Patent number: 6891368
    Abstract: A magnetoresistive sensor device including a substrate, and a sensing portion and a signal processing circuit formed above the substrate with a resin film being disposed between the sensing portion and the signal processing circuit. The sensing portion detects changes in a magnetic field induced by a moving body, is located at a position for effectively detecting changes in a magnetic field induced by the moving body, and is constituted by a magnetoresistive sensor element.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: May 10, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuji Kawano, Naoki Yasuda, Motohisa Taguchi, Ikuya Kawakita, Shinichi Hosomi, Tatsuya Fukami
  • Magnetoresistive sensor device
    Publication number: 20030197503
    Abstract: The present invention provides a magnetoresistive sensor device including a substrate, and a sensing portion and a signal processing circuit formed above the substrate with a resin film being disposed between the sensing portion and the signal processing circuit,
    Type: Application
    Filed: November 5, 2002
    Publication date: October 23, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuji Kawano, Naoki Yasuda, Motohisa Taguchi, Ikuya Kawakita, Shinichi Hosomi, Tatsuya Fukami
  • Vehicle-mounted magnetoresistive sensor element
    Publication number: 20020175803
    Abstract: A vehicle-mounted magnetoresistive sensor element includes plural plies of a magnetic layer and plural plies of a nonmagnetic layer, the magnetic layer and the nonmagnetic layer are alternately laminated with each other, the magnetic layer mainly contains Ni, Fe and Co, and the nonmagnetic layer mainly contains Cu, in which the magnetic layer has a composition represented by the following formula: Ni(1−x−y)FeyCox, where x and y satisfy the following conditions: x≧0.7, y≦0.3 and (1−x−y)≦0.15, the nonmagnetic layer has a composition represented by the following formula: CuzAl(1−z), where A is an additional element other than Cu, and z≧0.9; the thickness tm (angstrom) of the magnetic layer and the thickness tn (angstrom) of the nonmagnetic layer satisfy the following conditions: 10<tm<25; and 18<tn<25; and, when a guaranteed storage temperature of the magnetoresistive sensor element is T° C.
    Type: Application
    Filed: November 30, 2001
    Publication date: November 28, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuji Kawano, Motohisa Taguchi, Ikuya Kawakita, Tatsuya Fukami
  • Rotation sensor
    Patent number: 6323644
    Abstract: The present invention improves the sensitivity and expands the temperature range of operation of a magnetic detection device used in conjunction with rotary shafts such as those found in automobiles. A magnetic detection element consists of a giant magnetoresistance element and an integrated circuit for performing a predetermined operational processing based on the variation of magnetic field detected by the giant magnetoresistance element, and the magnetic detection element is operated in the magnetic field in the range of exceeding the magnetic field for maximizing the resistance value of the giant magnetoresistance element and below the field obtained by multiplying the saturation magnetic field of the giant magnetoresistance element by 0.8.
    Type: Grant
    Filed: October 22, 1999
    Date of Patent: November 27, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Ikuya Kawakita