Patents by Inventor Naoki Hiraoka

Naoki Hiraoka 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: 6870365
    Abstract: Six magneto-resistance segments are formed by film-forming on a signal processing circuit part consisting of an IC chip and are disposed in a predetermined rotation direction of a magnetic moving body, symmetrically about the centerline of a magnet perpendicular to that rotation direction. Two pairs of magneto-resistance segments, whose pitch centers are positioned symmetrically with respect to the centerline of the magnet, form first and second bridge circuits, and the remaining pair of magneto-resistance segments, which has its pitch center on the centerline of the magnet, forms a third bridge circuit.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: March 22, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Yokotani, Izuru Shinjo, Naoki Hiraoka
  • Publication number: 20040095130
    Abstract: A magnetic detection apparatus can accurately detect the rotational position of a magnetic moving member even when intervals between adjacent teeth formed thereon and the circumferential width of each tooth itself are both small and when an opposing distance between the magnetic moving member and first and second magnetoresistive segments is large. A processing circuit is arranged apart from the magnetic moving member on a plane thereof, which is formed on its periphery with the teeth. The processing circuit has a bridge circuit including the first magnetoresistive segment and the second magnetoresistive segment. A magnet applies a magnetic field to the first and second magnetoresistive segments, and to the magnetic moving member in a direction of an axis of rotation thereof.
    Type: Application
    Filed: November 13, 2003
    Publication date: May 20, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Masahiro Yokotani, Izuru Shinjo, Naohiro Mishiro, Naoki Hiraoka
  • Publication number: 20040080314
    Abstract: A magnetic detection apparatus includes a first block, a second block, and an exterior resin covering the first block and the second block. The first block includes a magnetoresistive element for detecting a change in a magnetic field that varies in accordance with movement of a rotating member, electronic components forming a protection circuit against external noise, a first lead frame electrically connected with the electronic components, and a first base in which the electronic components, the first lead frame and the magnetoresistive element are sealed with a resin. The second block includes a magnet arranged in opposition to an object to be detected for generating a magnetic field, a second lead frame electrically connected with the first lead frame and having a connector terminal for outputting an output signal of the magnetoresistive element to an external member, and a second base in which the second lead frame is sealed with a resin.
    Type: Application
    Filed: April 18, 2003
    Publication date: April 29, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Shigeki Tsujii, Takuji Nada, Naoki Hiraoka
  • Publication number: 20040052154
    Abstract: An apparatus for feeding slurry to an external device. The apparatus includes a preparation tank for preparing the slurry. A circulation pipe is connected to the preparation tank to circulate the slurry. A feeding pipe is connected between the preparation tank and the external device to feed the external device with the slurry. A pump sends the chemical solution in the preparation tank to the circulation pipe and the feeding pipe. A concentration detector is arranged downstream to the pump to detect the concentration of the slurry. A controller controls the concentration of the chemical solution in the preparation tank in accordance with the detection value of the concentration detector and controls the feeding of the chemical solution.
    Type: Application
    Filed: September 16, 2003
    Publication date: March 18, 2004
    Applicant: FUJITSU VLSI LIMITED
    Inventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
  • Publication number: 20040017188
    Abstract: A magnetic detection apparatus can accurately detect the rotational position of a magnetic moving member even when intervals between adjacent teeth formed thereon and the circumferential width of each tooth itself are both small and when an opposing distance between the magnetic moving member and first and second magnetoresistive segments is large. A processing circuit is arranged apart from the magnetic moving member on a plane thereof, which is formed on its periphery with the teeth. The processing circuit has a bridge circuit including the first magnetoresistive segment and the second magnetoresistive segment. A magnet applies a magnetic field to the first and second magnetoresistive segments, and to the magnetic moving member in a direction of an axis of rotation thereof. The first magnetoresistive segment is arranged substantially on a center line passing through the center of the circumferential width of the magnet, when viewed along the axis of rotation of the magnetic moving member.
    Type: Application
    Filed: December 3, 2002
    Publication date: January 29, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Masahiro Yokotani, Izuru Shinjo, Naohiro Mishiro, Naoki Hiraoka
  • Patent number: 6661221
    Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetoresistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetoresistance element, wherein the giant magnetoresistance element and the integrated circuit are formed on the same surface.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: December 9, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
  • Patent number: 6659634
    Abstract: An apparatus for feeding slurry to an external device. The apparatus includes a preparation tank for preparing the slurry. A circulation pipe is connected to the preparation tank to circulate the slurry. A feeding pipe is connected between the preparation tank and the external device to feed the external device with the slurry. A pump sends the chemical solution in the preparation tank to the circulation pipe and the feeding pipe. A concentration detector is arranged downstream to the pump to detect the concentration of the slurry. A controller controls the concentration of the chemical solution in the preparation tank in accordance with the detection value of the concentration detector and controls the feeding of the chemical solution.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: December 9, 2003
    Assignee: Fujitsu VLSI Limited
    Inventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
  • Patent number: 6630821
    Abstract: A magnetic detection device capable of detecting moving direction of a toothed magnetic movement body is provided. The magnetic detection device comprises a circuit for converting output signals of plural magneto-resistance effect elements 21 and 22 located in moving direction of toothed magnetic movable body to a ternary signal of a high level, a low level 1 and a low level 2, and in which a binary signal of the high level and the low level 1 is output when the toothed magnetic movement body is rotated in forward direction and a binary signal of the high level and the low level 2 is output when the toothed magnetic movement body is rotated in reverse direction.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: October 7, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
  • Publication number: 20030104959
    Abstract: An apparatus for feeding slurry to an external device. The apparatus includes a preparation tank for preparing the slurry. A circulation pipe is connected to the preparation tank to circulate the slurry. A feeding pipe is connected between the preparation tank and the external device to feed the external device with the slurry. A pump sends the chemical solution in the preparation tank to the circulation pipe and the feeding pipe. A concentration detector is arranged downstream to the pump to detect the concentration of the slurry. A controller controls the concentration of the chemical solution in the preparation tank in accordance with the detection value of the concentration detector and controls the feeding of the chemical solution.
    Type: Application
    Filed: October 29, 2002
    Publication date: June 5, 2003
    Applicant: FUJITSU VLSI LIMITED
    Inventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
  • Publication number: 20020186613
    Abstract: A chemical supplying apparatus includes first and second mixing tanks for mixing and supplying chemical slurries used in a semiconductor fabrication process. The slurries are alternately provided from the first and second mixing tanks such that the slurry is continuously available to a processing apparatus for maximum efficiency. While one of the tanks is supplying the slurry, the other tank is cleaned and then used to prepare a new batch of the slurry.
    Type: Application
    Filed: August 12, 2002
    Publication date: December 12, 2002
    Applicant: FUJITSU LIMITED
    Inventors: Naoki Hiraoka, Takeshi Hiraide
  • Publication number: 20020153881
    Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetoresistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetoresistance element, wherein the giant magnetoresistance element and the integrated circuit are formed on the same surface.
    Type: Application
    Filed: June 5, 2002
    Publication date: October 24, 2002
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
  • Patent number: 6457852
    Abstract: A chemical supplying apparatus includes first and second mixing tanks for mixing and supplying chemical slurries used in a semiconductor fabrication process. The slurries are alternately provided from the first and second mixing tanks such that the slurry is continuously available to a processing apparatus for maximum efficiency. While one of the tanks is supplying the slurry, the other tank is cleaned and then used to prepare a new batch of the slurry.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: October 1, 2002
    Assignee: Fujitsu Limited
    Inventors: Naoki Hiraoka, Takeshi Hiraide
  • Patent number: 6427316
    Abstract: A method of manufacturing a rotation sensor is provided. In the method, an insert conductor having a predetermined shape and having at least a connector terminal and a conversion device terminal is provided. The insert conductor is insert-molded in a resin base such that at least the connector terminal and the conversion device terminal of the insert conductor remain exposed from the resin base. A resin connector part is molded such that the resin connector part encircles the connector terminal. Also, a magnetoelectric conversion device is connected to the conversion device terminal of the insert conductor, and positioning parts are provided at a tip of the resin base. In addition, the magnetoelectric conversion device is sandwiched between the positioning parts to securely hold the magnetoelectric conversion device, and a press fit part is formed at the tip of the resin base.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: August 6, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Izuru Shinjo, Noriaki Hayashi, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
  • Patent number: 6426620
    Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetoresistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetoresistance element, wherein the giant magnetoresistance element and the integrated circuit are formed on the same surface.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: July 30, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
  • Publication number: 20020030487
    Abstract: A magnetic detection device capable of detecting moving direction of a toothed magnetic movement body is provided.
    Type: Application
    Filed: March 8, 2001
    Publication date: March 14, 2002
    Inventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
  • Patent number: 6339324
    Abstract: The invention provides a magnetic object motion sensor which can operate with high accuracy not only when a magnetic object moves at high speeds but also even when it moves at low speeds, which can be produced with a greater production tolerance and a greater dimensional tolerance.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: January 15, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Sakanoue, Noriaki Hayashi, Izuru Shinjo, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
  • Patent number: 6326779
    Abstract: A magnetic detector having high productivity is provided by producing a connector and a base as separate units, electrically interconnecting them, forming a cut-out portion in a press-in portion of the base, and injecting a thermosetting resin adhesive into a whole case. The case also has a recess portion that prevents excess injected resin from leaking to the outside of the case. The structure of the base also allows for easier injection of resin and simplified connection of the magnetic resistance element to the base.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: December 4, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Izuru Shinjo, Takuji Nada, Yasuyoshi Hatazawa, Naoki Hiraoka
  • Patent number: 6239595
    Abstract: A magnetic field sensing element comprises an underlayer formed on a substrate, a giant magnetic resistance element formed on the underlayer for detecting a change in a magnetic field, and an integrated circuit formed on the substrate for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by the giant magnetic resistance element, wherein the giant magnetic resistance element and the integrated circuit are formed on the same surface.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: May 29, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Izuru Shinjo, Yasuyoshi Hatazawa, Tatsuya Fukami, Motohisa Taguchi, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka
  • Patent number: 6211669
    Abstract: Disclosed is a magnetic detector in which a GMR device is operated within the limited range of a magnetic field so as to optimize changes in resistance value of the GMR device and to improve noise resistance. The magnetic detector comprises a magnet (4) for generating a magnetic field, a rotary member (2) of magnetic material arranged with a predetermined gap left relative to the magnet and provided with projections capable of changing the magnetic field generated by the magnet, and a giant magnetoresistance device (3) of which resistance value is changed depending on the magnetic field changed by the rotary member of magnetic material. The giant magnetoresistance device is arranged in such a position with a predetermined gap relative to the magnetic field generating means that the giant magnetoresistance device is subject to a bias magnetic field applied with the intensity of magnetic field in a predetermined range, e.g.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: April 3, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Yokotani, Izuru Shinjo, Yasuyoshi Hatazawa, Naoki Hiraoka
  • Patent number: 6140813
    Abstract: A magnetic object motion sensor which can operate with high accuracy not only when a magnetic object moves at high speeds but also even when it moves at low speeds, which can be produced with a greater production tolerance and a greater dimensional tolerance.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: October 31, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Sakanoue, Noriaki Hayashi, Izuru Shinjo, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi