Patents by Inventor Tsuyoshi Ichiki

Tsuyoshi Ichiki 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: 11972877
    Abstract: A superconducting wire connector includes superconducting wires and a sintered body containing MgB2. The superconducting wires are connected by the sintered body. At least one of the superconducting wires includes a superconducting core having a first outer surface. The sintered body is in contact with the first outer surface. A method of connecting superconducting wires by a sintered body containing MgB2 includes exposing a superconducting core of at least one of the superconducting wires by removing a portion, positioned in the middle in a longitudinal direction of the at least one of the superconducting wires, of a metal sheath disposed around the superconducting core, disposing the at least one of the superconducting wires through a container, filling the container with a raw material of MgB2, and forming the sintered body being in contact with an outer surface of the superconducting core by sintering the raw material filled in the container.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: April 30, 2024
    Assignee: HITACHI, LTD.
    Inventors: Shinji Fujita, Tsuyoshi Wakuda, Yota Ichiki, Motomune Kodama
  • Patent number: 7855859
    Abstract: In an MR element, first and second ferromagnetic layers are antiferromagnetically coupled to each other through a spacer layer, and have magnetizations that are in opposite directions when no external magnetic field is applied thereto and that change directions in response to an external magnetic field. The spacer layer and the second ferromagnetic layer are stacked in this order on the first ferromagnetic layer. The first ferromagnetic layer includes a plurality of ferromagnetic material layers stacked, and an insertion layer made of a nonmagnetic material and inserted between respective two of the ferromagnetic material layers that are adjacent to each other along the direction in which the layers are stacked. The ferromagnetic material layers and the spacer layer each include a component whose crystal structure is a face-centered cubic structure.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: December 21, 2010
    Assignee: TDK Corporation
    Inventors: Shinji Hara, Koji Shimazawa, Yoshihiro Tsuchiya, Tomohito Mizuno, Tsuyoshi Ichiki, Toshiyuki Ayukawa
  • Publication number: 20090303640
    Abstract: A magneto resistance effect element includes a first magnetic layer, a second magnetic layer and a spacer layer interposed between the first and second magnetic layers. The magneto resistance effect element is configured to allow sense current to flow in a direction that is perpendicular to film planes of the first magnetic layer, the second magnetic layer and the spacer layer so that a relative angle between a magnetization direction of the first magnetic layer and a magnetization direction of the second magnetic layer varies depending on an external magnetic field. The present invention aims at providing a magneto resistance effect element which ensures high resistance to sense current, while limiting the influence of the current limiting layer on the magnetic layer, and which thereby achieves a high magneto resistance ratio.
    Type: Application
    Filed: April 25, 2008
    Publication date: December 10, 2009
    Applicant: TDK CORPORATION
    Inventors: Tomohito Mizuno, Koji Shimazawa, Yoshihiro Tsuchiya, Daisuke Miyauchi, Takahiko Machita, Shinji Hara, Tsutomu Chou, Hironobu Matsuzawa, Toshiyuki Ayukawa, Tsuyoshi Ichiki
  • Publication number: 20090168264
    Abstract: In an MR element, first and second ferromagnetic layers are antiferromagnetically coupled to each other through a spacer layer, and have magnetizations that are in opposite directions when no external magnetic field is applied thereto and that change directions in response to an external magnetic field. The spacer layer and the second ferromagnetic layer are stacked in this order on the first ferromagnetic layer. The first ferromagnetic layer includes a plurality of ferromagnetic material layers stacked, and an insertion layer made of a nonmagnetic material and inserted between respective two of the ferromagnetic material layers that are adjacent to each other along the direction in which the layers are stacked. The ferromagnetic material layers and the spacer layer each include a component whose crystal structure is a face-centered cubic structure.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 2, 2009
    Applicant: TDK CORPORATION
    Inventors: Shinji Hara, Koji Shimazawa, Yoshihiro Tsuchiya, Tomohito Mizuno, Tsuyoshi Ichiki, Toshiyuki Ayukawa
  • Publication number: 20090128965
    Abstract: A magnetic field detecting element has a stack which includes a NiCr layer, a first magnetic layer whose magnetization direction varies in accordance with an external magnetic field, a non-magnetic spacer layer, and a second magnetic layer whose magnetization direction varies in accordance with the external magnetic field, said NiCr layer, said first magnetic layer, said spacer layer and said second magnetic layer being disposed in this order and being arranged in contact with each other, wherein a sense current is adapted to flow in a direction that is perpendicular to a film surface of said stack; and a bias magnetic layer which is disposed on a side of said stack, said side being opposite to an air bearing surface of said stack, wherein said bias magnetic layer is adapted to apply a bias magnetic field to said stack in a direction that is perpendicular to said air bearing surface.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 21, 2009
    Inventors: Tomohito MIZUNO, Yoshihiro TSUCHIYA, Shinji HARA, Koji SHIMAZAWA, Daisuke MIYAUCHI, Takahiko MACHITA, Tsutomu CHOU, Toshiyuki AYUKAWA, Hironobu MATSUZAWA, Tsuyoshi ICHIKI
  • Patent number: 7303974
    Abstract: A method is provided for optimizing the physical characteristics of a coating solution for an undercoat layer formed between a polarizable electrode layer and surface-roughened collector. A first step is carried out to form an undercoat layer on a collector whose surface has been roughened, and a second step is carried out to form a polarizable electrode layer on the undercoat layer. The first step is performed by coating the collector with a coating solution for the undercoat layer that includes electroconductive particles, a binder, and a solvent; the viscosity of the coating solution for the undercoat layer is set to from 0.15 to 0.75 Pa·s, and the weight ratio (P/B) of the electroconductive particles (P) and binder (B) is set to from 20/80 to 40/60. The coating area of the undercoat layer can thereby be adjusted with high precision, and the resistance of the undercoat layer can be reduced.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: December 4, 2007
    Assignee: TDK Corporation and Honda Motor Co., Ltd.
    Inventors: Kiyonori Hinoki, Tsuyoshi Ichiki, Kazutoshi Emoto, Takehiko Sasaki, Kenichi Murakami, Shigeki Oyama, Manabu Iwaida
  • Patent number: 7303975
    Abstract: A method is provided for optimizing the physical characteristics of a coating solution for a polarizable electrode layer formed on a collector. A first step is carried out to prepare a coating solution that includes porous particles, a fluorine-based binder, a good solvent that dissolves said fluorine-based binder, and a poor solvent that does not dissolve said fluorine-based binder. A second step is carried out to coat a collector with said coating solution to form the polarizable electrode layer on the collector. The viscosity of said coating solution for the polarizable electrode layer is set to between 0.5 to 3.5 Pa·s and a weight ratio (GS/PS) of said good solvent (GS) and said poor solvent (PS) is set to between 60/40 to 80/20. The occurrence of cracks in the polarizable electrode layer and large nonuniformities in the thickness of the polarizable electrode layer can thus be prevented.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: December 4, 2007
    Assignee: TDK Corporation and Honda Motor Co., Ltd.
    Inventors: Kiyonori Hinoki, Tsuyoshi Ichiki, Kazutoshi Emoto, Takehiko Sasaki, Kenichi Murakami, Shigeki Oyama, Manabu Iwaida
  • Patent number: 7251122
    Abstract: An electric chemical capacitor includes first and second electrodes each including a collector 111, 121, a polarized electrode layer 112, 122 and an undercoat layer 113, 123 for bonding the collector and the polarized electrode layer with each other, and a separator put between the first and second electrodes so that the polarized electrode layers 112 and 122 face each other, wherein an end portion of each undercoat layer 113, 123 is located in the same position as or on the outer side of an end portion of the corresponding polarized electrode layer 112, 122, and located on the inner side of an end portion of the separator 130. Thus, the polarized electrode layers can be prevented from peeling from the collector. Further, the undercoat layers can be prevented from abutting against each other, and the undercoat layer of one electrode and the collector of the other electrode can be prevented from abutting against each other.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: July 31, 2007
    Assignee: TDK Corporation
    Inventors: Kiyonori Hinoki, Yousuke Miyaki, Kazuo Katai, Hideki Tanaka, Tsuyoshi Ichiki
  • Publication number: 20070026140
    Abstract: A method is provided for optimizing the physical characteristics of a coating solution for an undercoat layer formed between a polarizable electrode layer and surface-roughened collector. A first step is carried out to form an undercoat layer on a collector whose surface has been roughened, and a second step is carried out to form a polarizable electrode layer on the undercoat layer. The first step is performed by coating the collector with a coating solution for the undercoat layer that includes electroconductive particles, a binder, and a solvent; the viscosity of the coating solution for the undercoat layer is set to from 0.15 to 0.75 Pa·s, and the weight ratio (P/B) of the electroconductive particles (P) and binder (B) is set to from 20/80 to 40/60. The coating area of the undercoat layer can thereby be adjusted with high precision, and the resistance of the undercoat layer can be reduced.
    Type: Application
    Filed: May 16, 2006
    Publication date: February 1, 2007
    Applicants: TDK Corporation, Honda Motor Co., Ltd.
    Inventors: Kiyonori Hinoki, Tsuyoshi Ichiki, Kazutoshi Emoto, Takehiko Sasaki, Kenichi Murakami, Shigeki Oyama, Manabu Iwaida
  • Publication number: 20070026623
    Abstract: A method is provided for optimizing the physical characteristics of a coating solution for a polarizable electrode layer formed on a collector. A first step is carried out to prepare a coating solution that includes porous particles, a fluorine-based binder, a good solvent that dissolves said fluorine-based binder, and a poor solvent that does not dissolve said fluorine-based binder. A second step is carried out to coat a collector with said coating solution to form the polarizable electrode layer on the collector. The viscosity of said coating solution for the polarizable electrode layer is set to between 0.5 to 3.5 Pa·s and a weight ratio (GS/PS) of said good solvent (GS) and said poor solvent (PS) is set to between 60/40 to 80/20. The occurrence of cracks in the polarizable electrode layer and large nonuniformities in the thickness of the polarizable electrode layer can thus be prevented.
    Type: Application
    Filed: May 16, 2006
    Publication date: February 1, 2007
    Applicants: TDK Corporation, Honda Motor Co., Ltd.
    Inventors: Kiyonori Hinoki, Tsuyoshi Ichiki, Kazutoshi Emoto, Takehiko Sasaki, Kenichi Murakami, Shigeki Oyama, Manabu Iwaida
  • Publication number: 20050201041
    Abstract: An electric chemical capacitor includes first and second electrodes each including a collector 111, 121, a polarized electrode layer 112, 122 and an undercoat layer 113, 123 for bonding the collector and the polarized electrode layer with each other, and a separator put between the first and second electrodes so that the polarized electrode layers 112 and 122 face each other, wherein an end portion of each undercoat layer 113, 123 is located in the same position as or on the outer side of an end portion of the corresponding polarized electrode layer 112, 122, and located on the inner side of an end portion of the separator 130. Thus, the polarized electrode layers can be prevented from peeling from the collector. Further, the undercoat layers can be prevented from abutting against each other, and the undercoat layer of one electrode and the collector of the other electrode can be prevented from abutting against each other.
    Type: Application
    Filed: December 21, 2004
    Publication date: September 15, 2005
    Applicant: TDK Corporation
    Inventors: Kiyonori Hinoki, Yousuke Miyaki, Kazuo Katai, Hideki Tanaka, Tsuyoshi Ichiki