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: 6870365Abstract: 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: GrantFiled: April 9, 2004Date of Patent: March 22, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Izuru Shinjo, Naoki Hiraoka
-
Publication number: 20040095130Abstract: 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: ApplicationFiled: November 13, 2003Publication date: May 20, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiro Yokotani, Izuru Shinjo, Naohiro Mishiro, Naoki Hiraoka
-
Publication number: 20040080314Abstract: 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: ApplicationFiled: April 18, 2003Publication date: April 29, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Shigeki Tsujii, Takuji Nada, Naoki Hiraoka
-
Publication number: 20040052154Abstract: 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: ApplicationFiled: September 16, 2003Publication date: March 18, 2004Applicant: FUJITSU VLSI LIMITEDInventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
-
Publication number: 20040017188Abstract: 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: ApplicationFiled: December 3, 2002Publication date: January 29, 2004Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Masahiro Yokotani, Izuru Shinjo, Naohiro Mishiro, Naoki Hiraoka
-
Patent number: 6661221Abstract: 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: GrantFiled: June 5, 2002Date of Patent: December 9, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
-
Patent number: 6659634Abstract: 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: GrantFiled: October 29, 2002Date of Patent: December 9, 2003Assignee: Fujitsu VLSI LimitedInventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
-
Patent number: 6630821Abstract: 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: GrantFiled: March 8, 2001Date of Patent: October 7, 2003Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
-
Publication number: 20030104959Abstract: 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: ApplicationFiled: October 29, 2002Publication date: June 5, 2003Applicant: FUJITSU VLSI LIMITEDInventors: Naoki Hiraoka, Hiroshi Osuda, Hotaka Yamamoto
-
Publication number: 20020186613Abstract: 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: ApplicationFiled: August 12, 2002Publication date: December 12, 2002Applicant: FUJITSU LIMITEDInventors: Naoki Hiraoka, Takeshi Hiraide
-
Publication number: 20020153881Abstract: 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: ApplicationFiled: June 5, 2002Publication date: October 24, 2002Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
-
Patent number: 6457852Abstract: 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: GrantFiled: March 31, 1998Date of Patent: October 1, 2002Assignee: Fujitsu LimitedInventors: Naoki Hiraoka, Takeshi Hiraide
-
Patent number: 6427316Abstract: 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: GrantFiled: November 2, 1999Date of Patent: August 6, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Noriaki Hayashi, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
-
Patent number: 6426620Abstract: 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: GrantFiled: May 10, 1999Date of Patent: July 30, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Motohisa Taguchi, Izuru Shinjo, Yuji Kawano, Tatsuya Fukami, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka, Yasuyoshi Hatazawa
-
Publication number: 20020030487Abstract: A magnetic detection device capable of detecting moving direction of a toothed magnetic movement body is provided.Type: ApplicationFiled: March 8, 2001Publication date: March 14, 2002Inventors: Izuru Shinjo, Hiroshi Sakanoue, Naoki Hiraoka
-
Patent number: 6339324Abstract: 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: GrantFiled: September 11, 2000Date of Patent: January 15, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Sakanoue, Noriaki Hayashi, Izuru Shinjo, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi
-
Patent number: 6326779Abstract: 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: GrantFiled: October 14, 1998Date of Patent: December 4, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Takuji Nada, Yasuyoshi Hatazawa, Naoki Hiraoka
-
Patent number: 6239595Abstract: 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: GrantFiled: November 19, 1998Date of Patent: May 29, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Izuru Shinjo, Yasuyoshi Hatazawa, Tatsuya Fukami, Motohisa Taguchi, Kazuhiko Tsutsumi, Yuuichi Sakai, Naoki Hiraoka
-
Patent number: 6211669Abstract: 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: GrantFiled: October 20, 1998Date of Patent: April 3, 2001Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masahiro Yokotani, Izuru Shinjo, Yasuyoshi Hatazawa, Naoki Hiraoka
-
Patent number: 6140813Abstract: 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: GrantFiled: November 1, 1996Date of Patent: October 31, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Sakanoue, Noriaki Hayashi, Izuru Shinjo, Naoki Hiraoka, Wataru Fukui, Yutaka Ohashi