Patents by Inventor Takashi Ishigami

Takashi Ishigami 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: 10418323
    Abstract: An improvement is achieved in the performance of a semiconductor-device. The semiconductor device includes MISFETs formed in the upper surface of a substrate, a plurality of wiring layers stacked over the upper surface of the substrate, and a plurality of plugs each coupling two of the wiring layers to each other. The wiring layers located under the uppermost wiring layer include wires. The uppermost wiring layer includes a pad, an insulating film formed over the pad, and an opening extending through the insulating film and reaching the pad. The MISFETs and the wires overlap the opening in plan view. None of the plurality of plugs overlaps the opening in plan view.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: September 17, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yoshihisa Matsubara, Takashi Ishigami
  • Patent number: 10348149
    Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: July 9, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuichiro Baba, Takashi Ishigami, Ryoji Kobayashi, Manabu Oshida, Satoshi Yamamura
  • Publication number: 20190122805
    Abstract: The invention is directed to a stationary induction electric device that can reduce loss. To this end, the stationary induction electric device is provided with a first iron core block erected and formed in an annular shape, a second iron core block configured to surround the outer periphery of the first iron core block, a winding wound around the first and the second iron core blocks, a first support plate supporting the upper portion of the first iron core block from below, and a second support plate supporting the upper portion of the second iron core block from below, and a curvature radius of a curved portion appearing on the outer periphery of the lower portion of the second iron core block is made larger than a curvature radius of a curved portion appearing on the outer periphery of the upper portion of the second iron core block.
    Type: Application
    Filed: April 27, 2016
    Publication date: April 25, 2019
    Inventors: Naoya MIYAMOTO, Yu YAMADA, Takashi ISHIGAMI, Naoyuki KURITA, Akira NISHIMIZU
  • Publication number: 20190096562
    Abstract: The present invention is to improve a performance of a transformer having wound iron cores.
    Type: Application
    Filed: April 19, 2016
    Publication date: March 28, 2019
    Inventors: Yu YAMADA, Takashi ISHIGAMI, Akira NISHIMIZU, Kouji SASAKI
  • Publication number: 20190027989
    Abstract: A stator includes: a stator core that includes a plurality of slots; a stator coil that is formed by connecting a plurality of segment conductors to each other; and an insulating member that has insulating properties, in which the segment conductor includes a slot portion and an inclined portion, the slot portion is disposed inside the slot, the inclined portion is disposed outside the slot to be inclined from the slot portion, the insulating member is mounted on the stator core and includes a first insulating portion and a plurality of second insulating portions, the first insulating portion is disposed next to the slot portion, the second insulating portions extend from the first insulating portion in an axial direction and are provided along a radial direction of the stator core, and the second insulating portions insulate adjacent segment conductors in an coil end from each other.
    Type: Application
    Filed: October 24, 2016
    Publication date: January 24, 2019
    Inventors: Takashi ISHIGAMI, Hiroshi KANAZAWA, Kenji NAKAYAMA
  • Publication number: 20180034337
    Abstract: The present disclosure generally relates to a rotary electric machine having a stator winding in which bobbins forming a coil are arranged in a circumferential direction. The bobbin includes plate-like flanges on an inner and outer circumferential side. Each flange has edges corresponding to a circumferential and an axial direction. One or more plate-like members form two or more groove portions in a radial direction in parallel with the flanges between the flanges provided on the inner and outer circumferential sides. The coil includes an electric wire wound around the groove portion between the flange and the plate-like member and the groove portion between adjacent plate-like members. As such, the electric wires can be wound in an aligned manner between the plate-like members. Also, slot space factor is improved, coil end is reduced, and output and efficiency of the rotary electric machine is improved.
    Type: Application
    Filed: March 14, 2016
    Publication date: February 1, 2018
    Applicant: HITACHI, LTD.
    Inventor: Takashi Ishigami
  • Publication number: 20170214287
    Abstract: A stator for a rotating electric machine facilitates the assembly of the stator coils and restricts its length in the axial direction. The stator includes a stator iron core having a plurality of teeth and a plurality of stator coils each being wound on one of the teeth. The stator coils include terminal stator coils, each having a crossover wire and a lead wire. Each crossover wire is connected to one of the stator coils of the same phase and each lead wire being is connected to an object other than the stator coils of the same phase. Each end of the crossover wires and the lead wires is disposed at a different level; a first level being the closest to the stator iron core. At least one of the lead wires of the terminal stator coils is disposed at least one level apart within the range of levels.
    Type: Application
    Filed: August 19, 2015
    Publication date: July 27, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuichiro BABA, Takashi ISHIGAMI, Ryoji KOBAYASHI, Manabu OSHIDA, Satoshi YAMAMURA
  • Publication number: 20170117767
    Abstract: A stator coil that is wound by concentrated winding and installed in a slot of a stator includes a winding part in which a conductor is wound pitch by pitch around a tooth of the stator and connection terminals which extend from both ends of the winding part. The winding part includes a plurality of unit winding subparts of a rectangular annular shape, a unit winding subpart including a pair of first straight-line segments, a pair of second straight-line segments, and curved corner segments which join the first straight-line segments and the second straight-line segments. In one of the pair of first straight-line segments, incline segments where the conductor is shifted by one pitch toward a winding axis direction are formed. In at least one of the unit winding subparts, a part of an incline segment is made by a part of each of the curved corner segments.
    Type: Application
    Filed: April 30, 2015
    Publication date: April 27, 2017
    Inventors: Takashi ISHIGAMI, Yuichiro BABA, Manabu OSHIDA, Ryoji KOBAYASHI
  • Publication number: 20170054340
    Abstract: Each pair of coils mutually connected in a stator winding is arranged in a fashion that a first coil of each pair of coils has an inner-circumferential-side coil terminal (212) led out from an inner-circumferential-side slot position in the direction of a coil end (220) of the stator winding, and that a second coil of each pair of coils has an outer-circumferential-side coil terminal (211) led out from an outer-circumferential-side slot position in the direction of the coil end (220) of the stator winding for connection to the inner-circumferential-side coil terminal (212), wherein there is provided a coil terminal connection structure in which the inner-circumferential-side coil terminal (212) is connected to the outer-circumferential-side coil terminal (211) across the coil end (220), and joint parts (211a, 212a) thereof are bent close to the coil end (220).
    Type: Application
    Filed: November 9, 2016
    Publication date: February 23, 2017
    Inventors: Yuichiro TANAKA, Takashi ISHIGAMI, Kenichi NAKAYAMA, Yasuyuki SAITO
  • Patent number: 9496773
    Abstract: A rotating electrical machine includes a stator and a rotor. The stator winding includes a plurality of conductor segments inserted through the slots from one end surface of the stator core with end portions of the conductor segments projecting out beyond another end surface of the stator core. The conductor segments include an undeformed portion, a plastically deformed portion formed at the end portions thereof and a tapered portion. The plastically deformed portion has a dimension of the plastically deformed portion along a circumferential direction that is greater than a dimension of the undeformed portion along the circumferential direction and so that a dimension of the plastically deformed portion along a radial direction is smaller than a dimension of the undeformed portion along the radial direction. The conductor segments are welded together at tops of the plastically deformed portions thereof.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: November 15, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takashi Ishigami, Yutaka Matsunobu, Yoshimi Mori
  • Patent number: 9437486
    Abstract: A sputtering target contains high purity Nb of which Ta content is 3000 ppm or less and oxygen content is 200 ppm or less. Dispersion of the Ta content in all the sputtering target is within ±30% as a whole target. Dispersion of the oxygen content is within ±80% as a whole target. According to such sputtering target, an interconnection film of low resistivity can be realized. In addition, each grain of Nb in the sputtering target has a grain diameter in the range of 0.1 to 10 times an average grain diameter and ratios of grain sizes of adjacent grains are in the range of 0.1 to 10. According to such sputtering target, giant dust can be largely suppressed from occurring. The sputtering target is suitable for forming a Nb film as liner material of an Al interconnection.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 6, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi Watanabe, Yasuo Kohsaka, Takashi Watanabe, Takashi Ishigami, Yukinobu Suzuki, Naomi Fujioka
  • Patent number: 9425666
    Abstract: A stator includes: a stator core with N pieces of slots ranging along an axial direction, which are formed side-by-side along a circumferential direction; and a stator winding installed in the slots at the stator winding. The stator winding includes a plurality of winding groups, each made up with N pieces of lap-wound coils each formed by winding a conductor wire a plurality of times. The winding groups are disposed in a plurality of layers set side-by-side along a radial direction at the stator core. One coil side at each of the lap-wound coils is inserted in a specific slot on an inner side along the radial direction in a specific layer and another coil side of the lap-wound coil is inserted in another slot on an outer side along the radial direction in the specific layer.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: August 23, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takashi Ishigami, Yutaka Matsunobu
  • Publication number: 20160218060
    Abstract: An improvement is achieved in the performance of a semiconductor-device. The semiconductor device includes MISFETs formed in the upper surface of a substrate, a plurality of wiring layers stacked over the upper surface of the substrate, and a plurality of plugs each coupling two of the wiring layers to each other. The wiring layers located under the uppermost wiring layer include wires. The uppermost wiring layer includes a pad, an insulating film formed over the pad, and an opening extending through the insulating film and reaching the pad. The MISFETs and the wires overlap the opening in plan view. None of the plurality of plugs overlaps the opening in plan view.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 28, 2016
    Applicant: Renesas Electronics Corporation
    Inventors: Yoshihisa MATSUBARA, Takashi ISHIGAMI
  • Patent number: 9369018
    Abstract: A manufacturing method for manufacturing a rotating electrical machine equipped with a stator that includes a continuously wound coil unit achieved by continuously winding concentrated winding-type coils via cross wires, with coil wire having a rectangular section.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: June 14, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Tanaka, Takashi Ishigami
  • Patent number: 9281724
    Abstract: In a rotating electrical machine, the concentrated winding coil includes a single-layer coil, corresponding to one layer, wound in a first turn advancing mode with the wire forming sequential coil turns starting from one end of the insulating bobbin toward another end of the insulating bobbin and another single-layer coil, corresponding to one layer, wound in a second turn advancing mode with the wire forming turns starting from the other end of the insulating bobbin toward the one end of the insulating bobbin, with the single-layer coil and the other single-layer coil layered alternately to each other. The insulating bobbin includes a winding portion where the concentrated winding coil is formed, collars each formed at one of two ends of the winding portion and at least one projecting portion configured to disallow misalignment at a turn changeover start area in the first and second turn advancing modes.
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: March 8, 2016
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Takashi Ishigami, Kenji Nakayama, Hiroshi Kanazawa
  • Publication number: 20150280505
    Abstract: An axial gap dynamoelectric machine is provided with a stator core in which continuously wound coils (10a, 10d, 10g, 10j) including a plurality of coils formed of continuously wound insulation-coated conductor wire are disposed in a circumferential direction with the continuously wound coils of the three phases overlapped. With the respective coils being disposed in a radiating shape, the continuously wound coils are configured so that on the inner diameter side of the coils, the insulation-coated conductor wires are continuously wound to adjacent coils via crossover wires (15U2, 15U3, 15U4, 15U5), and the coils are bent in the vertical direction and the continuously wound coils of each phase are made to overlap with each other so that the length (2×L3+L2) of the crossover wires can be adjusted regardless of the core layer thickness (L1) of the stator core.
    Type: Application
    Filed: October 1, 2013
    Publication date: October 1, 2015
    Inventors: Yuichiro Tanaka, Takashi Ishigami
  • Publication number: 20140346915
    Abstract: A rotating electrical machine includes a stator and a rotor. The stator winding includes a plurality of conductor segments inserted through the slots from one end surface of the stator core with end portions of the conductor segments projecting out beyond another end surface of the stator core. The conductor segments include an undeformed portion, a plastically deformed portion formed at the end portions thereof and a tapered portion. The plastically deformed portion has a dimension of the plastically deformed portion along a circumferential direction that is greater than a dimension of the undeformed portion along the circumferential direction and so that a dimension of the plastically deformed portion along a radial direction is smaller than a dimension of the undeformed portion along the radial direction. The conductor segments are welded together at tops of the plastically deformed portions thereof.
    Type: Application
    Filed: December 13, 2012
    Publication date: November 27, 2014
    Inventors: Takashi Ishigami, Yutaka Matsunobu, Yoshimi Mori
  • Patent number: 8779644
    Abstract: A group of coils used in a stator of a rotating electrical machine, wound continuously upon a divided core with a crossover wire, in which 2N coils (where N is a natural number) are arranged at approximately regular intervals, wherein a winding direction of N coils, which are first through Nth continuously wound coils, of a front half of the 2N coils, and a winding direction of rear half coils which are (N+1)-st through (2N)-th continuously wound coils, are opposite.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: July 15, 2014
    Assignee: Kokusan Denki Co., Ltd.
    Inventors: Yuichiro Tanaka, Takashi Ishigami, Kota Sakuma, Toshihiko Mato
  • Patent number: RE45481
    Abstract: An interconnector line of thin film comprising 0.001 to 30 at % of at least one kind of a first element capable of constituting an intermetallic compound of aluminum and/or having a higher standard electrode potential than aluminum, for example, at least one kind of the first element selected from Y, Sc, La, Ce, Nd, Sm, Gd, Tb, Dy, Er, Th, Sr, Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Pd, Ir, Pt, Cu, Ag, Au, Cd, Si, Pb and B; and one kind of a second element selected from C, O, N and H in a proportion of 0.01 at ppm to 50 at % of the first element, with the balance comprising substantially Al. In addition to having low resistance, such an Al interconnector line of thin film can prevent the occurrence of hillocks and the electrochemical reaction with an ITO electrode. The interconnector line of thin film can be obtained by sputtering in a dust-free manner by using a sputter target having a similar composition.
    Type: Grant
    Filed: March 22, 2006
    Date of Patent: April 21, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Ishigami, Koichi Watanabe, Akihisa Nitta, Toshihiro Maki, Noriaki Yagi
  • Patent number: RE46265
    Abstract: Each pair of coils mutually connected in a stator winding is arranged in a fashion that a first coil of each pair of coils has an inner-circumferential-side coil terminal (212) led out from an inner-circumferential-side slot position in the direction of a coil end (220) of the stator winding, and that a second coil of each pair of coils has an outer-circumferential-side coil terminal (211) led out from an outer-circumferential-side slot position in the direction of the coil end (220) of the stator winding for connection to the inner-circumferential-side coil terminal (212), wherein there is provided a coil terminal connection structure in which the inner-circumferential-side coil terminal (212) is connected to the outer-circumferential-side coil terminal (211) across the coil end (220), and joint parts (211a, 212a) thereof are bent close to the coil end (220).
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: January 3, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Yuichiro Tanaka, Takashi Ishigami, Kenichi Nakayama, Yasuyuki Saito