Patents by Inventor Kiyoshi Sato

Kiyoshi Sato 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).

  • Thin film magnetic head having toroidal coil
    Patent number: 7212378
    Abstract: A thin-film magnetic has a coil toroidally wound around a magnetic layer. The coil includes a plurality of first coil segments that cross over the magnetic layer; a coil insulating layer covering the first coil segments, the magnetic layer being formed on the coil insulating layer; a plurality of second coil segments that cross over the magnetic layer, the second coil segments being formed on the coil insulating layer; and a plurality of bank layers disposed at two sides of the magnetic layer in the track width direction, the bank layers being electrically connected with ends of the first coil segments. Each second coil segment in the track width direction are electrically connected with upper faces of the bank layers to connect ends of the adjacent first coil layers with each other via the second coil segments. According to this structure, the second coil segments can be accurately formed by patterning.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: May 1, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventors: Kiyoshi Sato, Sumihito Morita
  • Thin film magnetic head having toroidally wound coil
    Patent number: 7209322
    Abstract: A first insulating sub-layer made of an inorganic insulating material is formed on a laminate, and second insulating sub-layers made of an organic insulating layer are formed on both sides of the first insulating sub-layer in the track width direction to extend beyond both end surfaces of the laminate in the track width direction. Also, second coil pieces are formed on the first and second insulating sub-layers. Therefore, the magnetization efficiency can be improved, and insulation can be effectively secured between the laminate and the second coil pieces.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: April 24, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Thin film magnetic head equipped with toroidal coil layer
    Patent number: 7206168
    Abstract: By forming a rearmost second coil piece so as to have a larger width in the track-width direction and a larger area than those of coil pieces, heat generated in a thin-film magnetic head can be effectively released to the rearmost coil piece. Thus, a temperature rise in the thin-film magnetic recording head can be further reduced than is possible today, thereby preventing the thin-film magnetic head from protrusion due to its thermal expansion.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: April 17, 2007
    Inventors: Kiyoshi Sato, Toru Takahashi, Hisayuki Yazawa
  • Method of manufacturing a perpendicular magnetic recording head
    Patent number: 7181829
    Abstract: A main magnetic pole layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed under the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily introduce a recording magnetic field to a fore end of the main magnetic pole layer.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: February 27, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventors: Toru Takahashi, Hisayuki Yazawa, Hideki Gochou, Kiyoshi Kobayashi, Minoru Yamada, Kiyoshi Sato, Toshinori Watanabe
  • Method of forming a thin film magnetic head
    Patent number: 7178221
    Abstract: In a thin-film magnetic head having a multilayered film developing a magnetoresistive effect, which is present between an upper shielding layer and a lower shielding layer both formed above an AlTiC substrate, a recess for defining the lower shielding layer is formed in an underlayer present on a surface of the AlTiC substrate, and a lower shielding layer made of NiFe is provided in the recess. A SiO2 film is interposed between the underlayer and the lower shielding layer.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 20, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Method of manufacturing a thin film magnetic head
    Patent number: 7174621
    Abstract: A thin film magnetic head has coil layer formed in a space surrounded by a lower core layer, a protruding layer and a back gap layer. The top of these layers are planarized to a continuous flat surface. A lower magnetic pole layer, a gap layer, an upper magnetic pole layer and an upper core layer are formed on the flat surface and are precisely formed in a predetermined shape. The track width Tw can also be set to a predetermined dimension by the width of the upper magnetic pole layer at a surface facing the recording medium. Also, the magnetic path can be shortened to improve magnetic properties.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: February 13, 2007
    Assignee: Alps Electronic Co., Ltd.
    Inventors: Kiyoshi Sato, Toshinori Watanabe, Toshihiro Kuriyama
  • Magnetic head including a gap-depth defining layer on protruding layer and method for manufacturing the same
    Patent number: 7170712
    Abstract: A recording thin-film magnetic head includes a gap-depth defining layer, lower magnetic pole layers and gap layers on the front and rear sides of the gap-depth defining layer, and an upper magnetic pole layer. The entire top surface of the gap-depth defining layer is covered with a first seed layer. The rear end surfaces of the lower magnetic pole layer and the gap layer on the front side are in contact with the front end surface of the gap-depth defining layer. The upper magnetic pole layer is formed on the gap layers by plating.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: January 30, 2007
    Assignee: ALPS Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Thin-film magnetic head appropriately suppressing side fringing and method for fabricating the same
    Patent number: 7167340
    Abstract: A thin-film magnetic head includes a lower core layer; a recording core formed on the lower core layer and exposed at a face surface facing a recording medium, the recording core including a gap layer, an upper pole layer, and optionally, a lower pole layer; an upper core layer magnetically coupled to the upper pole layer; and a coil. A tip surface of the upper core layer at the face surface is set back from the face surface in the height direction, and the tip surface is an inclined surface or a curved surface in which the depth gradually increases from the track width direction. A method for fabricating a thin-film magnetic head is also disclosed.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: January 23, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventors: Kiyoshi Sato, Toshinori Watanabe, Hideki Gochou, Kiyoshi Kobayashi, Toru Takahashi, Hisayuki Yazawa, Hiromi Ikegami, by Chiaki Ikegami, legal represenative, Masaki Ikegami
  • Thin-film magnetic head appropriately suppressing side fringing and method for fabricating the same
    Patent number: 7158345
    Abstract: A thin-film magnetic head includes a lower core layer; a recording core formed on the lower core layer and exposed at a face surface facing a recording medium, the recording core including a gap layer, an upper pole layer, and optionally, a lower pole layer; an upper core layer magnetically coupled to the upper pole layer; and a coil. A tip surface of the upper core layer at the face surface is set back from the face surface in the height direction, and the tip surface is an inclined surface or a curved surface in which the depth gradually increases from the track width direction. A method for fabricating a thin-film magnetic head is also disclosed.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: January 2, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventors: Kiyoshi Sato, Toshinori Watanabe, Hideki Gochou, Kiyoshi Kobayashi, Toru Takahashi, Hisayuki Yazawa, Hiromi Ikegami, legal representative, Chiaki Ikegami, legal representative, Masaki Ikegami, deceased
  • Thin-film magnetic head having helical coils and manufacturing method for the same
    Patent number: 7158344
    Abstract: A plurality of first coil segments is formed in a space encompassed by a lower core layer, a protuberant layer, and a back gap layer, and a magnetic pole layer is deposited on the first coil segments. Ends of adjacent first coil segments are connected through the intermediary of a plurality of second coil segments formed on the magnetic pole layer so as to form a helical coil layer. The upper surfaces of the protuberant layer, the first coil segments, and the back gap layer are formed to be a continuous planarized surface. A Gd-determining layer made of an insulating material is formed on the planarized surface such that it covers the upper surfaces of the first coil segments. The Gd-determining layer serves also as an insulating layer that isolates the first coil segments and the magnetic pole layer.
    Type: Grant
    Filed: March 8, 2004
    Date of Patent: January 2, 2007
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • TUNNELING MAGNETIC SENSING ELEMENT HAVING TWO-LAYER INSULATING FILM AND METHOD FOR FABRICATING SAME
    Publication number: 20060279881
    Abstract: A magnetic sensing element is provided. The magnetic sensing element includes a laminate disposed on a conductive layer. The laminate having a structure including a pinned magnetic layer, a nonmagnetic layer, and a free magnetic layer disposed in that order from the bottom, first insulating films disposed at both sides in the track width direction of the laminate, second insulating films disposed on the conductive layer, the second insulating films being connected to the respective first insulating films, bias layers disposed over the respective first insulating films and the respective second insulating films, wherein the thickness in the track width direction of the first insulating film is smaller than the thickness of the second insulating film.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 14, 2006
    Inventor: Kiyoshi Sato
  • Manufacturing method for a thin film magnetic head
    Patent number: 7143505
    Abstract: A thin film magnetic head is capable of reducing inductance by shortening a magnetic path, and also preventing a cavity from being formed in a coil insulating layer. The coil insulating layer is deposited on a lower core layer and at the rear of a recording portion, and a coil forming groove is formed in the coil insulating layer. Then, a coil layer is embedded in the coil forming groove. With this arrangement, bulges of the layers from an upper surface of the recording portion can be decreased so as to shorten a magnetic path.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: December 5, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Cable connector for balanced transmission
    Publication number: 20060270271
    Abstract: A cable connector for balanced transmission is disclosed. A spacer member is attached to a contact assembly body in the cable connector for balanced transmission, a first signal wire connecting part of a first signal contact member is inserted into a first groove of the spacer member, a second signal wire connecting part of a second signal contact member is inserted into a second groove of the spacer member, and a ground contact member is inserted in a slit of the spacer member, so that their positions are decided. A cable for balanced transmission includes plural pairs of wires, and a first signal wire of the pair of wires is soldered to the first signal connecting part, a second signal wire thereof is soldered to the second signal connecting part, and a drain wire thereof is soldered to a drain wire connecting part of the ground contact member.
    Type: Application
    Filed: March 20, 2006
    Publication date: November 30, 2006
    Applicant: FUJITSU COMPONENT LIMITED
    Inventors: Satoshi Moriyama, Takahiro Kondou, Kiyoshi Sato, Mitsuru Kobayashi
  • Method for manufacturing magnetic head
    Patent number: 7137191
    Abstract: A first insulating layer is formed on a main magnetic pole used as a magnetic pole layer to have a protruding portion and a flat portion formed around the protruding portion. A second insulating layer is formed on the flat portion, and then the protruding portion of the first insulating layer is cut to expose the upper surface of the main magnetic pole and to form the same planarized surface including the upper surfaces of the main magnetic pole and the second insulating layer. Polishing is stopped using the second insulating layer as a marker, thereby permitting precise control of the amount of polishing.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: November 21, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventors: Kiyoshi Sato, Kiyoshi Kobayashi
  • Wind power generator
    Publication number: 20060249957
    Abstract: When a wind velocity sensor detects a wind velocity higher than a predetermined level, a timer device starts a waiting timer function during an operation timer period shorter than the waiting timer period. After the waiting timer period is over, the waiting timer function is switched to an operation timer function, and a switching relay switches a generator to a motor only during an operation timer period. Then, a driving circuit performs a start assisting rotation. After the operation timer period is over, the waiting timer period re-starts. This process is repeated. When during this period, the number of rotations of a rotor monitored by a rotation number measuring device, based on the output voltage Vm of a three-phase conduction coil exceeds a predetermined number of rotations, the charging of a battery by a three-phase generator is started.
    Type: Application
    Filed: November 13, 2003
    Publication date: November 9, 2006
    Inventors: Ryosuke Ito, Kiyoshi Sato, Hideaki Tamura, Katsushi Kawakami
  • Method for manufacturing magnetic head
    Patent number: 7124498
    Abstract: A non-magnetic material layer which is formed with a taper region of which the film thickness is gradually reduced over the top surface and the side of an upper core layer and the side of the gap layer is formed by cutting the gap layer and the upper core layer on a lower core layer with a track width and the lower periphery of the taper region is contacted with the top surface of the lower core layer. On the top surface of the lower core layer extending from the lower periphery of the taper region to the both sides, the slopes inclined in the direction apart from the upper core layer are formed and a protrusion having a track width is formed on the lower core layer. The material layer having the same material as the lower core layer adhered to the outside of the non-magnetic material layer is removed.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: October 24, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Method of manufacturing a thin film magnetic head comprising an insulating layer provided between a core and coil
    Patent number: 7111387
    Abstract: A method of manufacturing a thin film magnetic head comprising an insulating layer provided between a core and a coil is provided. Also provided is a method for forming an inorganic insulation underlying layer and an organic insulation underlying layer on a lower core layer behind a recording region. The withstand voltage between the lower core layer and the coil layer can be improved because a coil is formed on the organic insulation underlying layer with an inorganic insulation layer disposed on the organic insulation layer.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: September 26, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Electrocorrosion preventive rolling bearing
    Patent number: 7097362
    Abstract: To provide an electrocorrosion preventive rolling bearing assembly wherein a final machining of an electrically insulating layer and a thickness control of the insulating layer can easily and accurately be accomplished, the electrocorrosion preventive rolling bearing assembly is of a type in which an inner race (2) or an outer race (3) is formed with an insulating layer (6) so as to cover a peripheral surface thereof, which engages a housing or a shaft, and opposite annular end faces thereof. The insulating layer (6) is a thermally sprayed layer of a metallic oxide. Of the inner and outer races (2) and (3), a raceway member having the insulating layer (6) is provided at its end face with a tool reference plane (7) for a process of finishing the electrically insulating layer (6) or for the thickness control of the insulating layer.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: August 29, 2006
    Assignee: NTN Corporation
    Inventors: Kosuke Inukai, Hideji Ito, Yukihiro Kataoka, Kiyoshi Sato
  • Thin-film magnetic head and method of forming the same
    Patent number: 7083989
    Abstract: In a thin-film magnetic head having a multilayered film developing a magnetoresistive effect, which is present between an upper shielding layer and a lower shielding layer both formed above an AlTiC substrate, a recess for defining the lower shielding layer is formed in an underlayer present on a surface of the AlTiC substrate, and a lower shielding layer made of NiFe is provided in the recess. A SiO2 film is interposed between the underlayer and the lower shielding layer.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: August 1, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato
  • Magnetic sensing element having no variation in track width and capable of properly complying with track narrowing
    Patent number: 7068476
    Abstract: The inner side end faces of electrode layers are formed in a region under which bias layers are not formed, to be located behind a magnetoresistive film in the height direction. Therefore, a sensing current flowing from the electrode layers can be appropriately inhibited from shunting to the bias layers, thereby permitting the manufacture of a magnetic sensing element capable of complying with track narrowing and suppressing variations in the track width Tw.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: June 27, 2006
    Assignee: Alps Electric Co., Ltd.
    Inventor: Kiyoshi Sato