Patents by Inventor Junichi Horie

Junichi Horie 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).

  • Patent number: 6377056
    Abstract: Dynamic quantitative displacement is converted stably and straight into voltage (D.C. output) by using a high speed detection driving frequency without restricting a response of an operational amplifier. When a dynamic quantity detection electrostatic capacitance changes according to a dynamic quantity, electric charges stored in this element and in a reference electrostatic capacitance become unbalanced to produce a difference value, and an output of an operational amplifier changes according to the difference in electric charge quantity. However, the output becomes finally stable when the electric charges in the dynamic quantity detection electrostatic capacitance and in the reference electrostatic capacitance become equal. The output is proportional to a reciprocal of the dynamic quantity detection electrostatic capacitance and it is a D.C. voltage. Further, output without depending on integration feedback capacitance (feedback condenser) CF can be obtained.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: April 23, 2002
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Keiji Hanzawa, Masahiro Matsumoto, Satoshi Shimada, Akihiko Saito, Yasuo Onose, Norio Ichikawa, Junichi Horie, Seiji Kuryu
  • Patent number: 6167761
    Abstract: In a capacitance type pressure sensor, a diaphragm is formed of a fragile material using an impurity-diffused monocrystal silicon and constitutes a stable pressure-responsive structure which does not undergo a plastic deformation. Between the diaphragm and a movable electrode is formed an oxide film to diminish stray capacitance between the movable electrode and a substrate and also between the movable electrode and a impurity-diffused layer. The oxide film and the movable electrode are each divided into plural regions so that the divided regions of the movable electrode are formed on the divided regions of the oxide film, thereby diminishing stress strain induced by a difference in therm expansion coefficient among the diaphragm, oxide film and movable electrode.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: January 2, 2001
    Assignee: Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.
    Inventors: Keiji Hanzawa, Akio Yasukawa, Satoshi Shimada, Seikou Suzuki, Akihiko Saito, Masahiro Matsumoto, Atsushi Miyazaki, Norio Ichikawa, Junichi Horie, Seiji Kuryu
  • Patent number: 5676851
    Abstract: A capacitance acceleration sensor and method of making same are disclosed. A capacitance acceleration sensor includes a movable electrode etched from a silicon plate which is clamped between two solid dielectric plate members of glass, silicon oxides, or oxygen oxides. Static electrodes are secured to surfaces of the dielectric members facing opposite the movable electrode, thereby providing easy manufacturing assessibility for leadout wires from these electrodes. In certain embodiments, the movable electrode is formed integrally with a monocrystalline silicon plate member which also contains an integrated circuit for generating an output acceleration signal in response to movement of the movable electrode when the assembly experiences acceleration forces.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: October 14, 1997
    Assignees: Hitachi Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Masayoshi Suzuki, Takao Sasayama, Keizi Hanzawa, Norio Ichikawa, Junichi Horie, Yukiko Sugisawa, Yuuji Ogasawara
  • Patent number: 5616844
    Abstract: A capacitance acceleration sensor includes a movable electrode etched from a silicon plate which is clamped between two solid dielectric plate members of glass, silicon oxides, or oxygen oxides. Static electrodes are secured to surfaces of the dielectric members facing opposite the movable electrode, thereby providing easy manufacturing assessibility for leadout wires from these electrodes. In certain embodiments, the movable electrode is formed integrally with a monocrystalline silicon plate member which also contains an integrated circuit for generating an output acceleration signal in response to movement of the movable electrode when the assembly experiences acceleration forces.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: April 1, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Masayoshi Suzuki, Takao Sasayama, Keizi Hanzawa, Norio Ichikawa, Junichi Horie, Yukiko Sugisawa, Yuuji Ogasawara