Patents by Inventor Masao Ichikawa

Masao Ichikawa 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: 11915928
    Abstract: A semiconductor memory device includes a first conductive layer, a semiconductor layer extending in a first direction and being opposed to the first conductive layer, and a gate insulating film disposed between the first conductive layer and the semiconductor layer. The first conductive layer includes a first region, a second region disposed between the first region and the gate insulating film, and a third region disposed between the first region and the first interlayer insulating layer. The first to the third regions contain a metal. The third region contains silicon (Si). The first region does not contain silicon (Si) or has a lower silicon (Si) content than a silicon (Si) content in the third region. The second region does not contain silicon (Si) or has a lower silicon (Si) content than the silicon (Si) content in the third region.
    Type: Grant
    Filed: September 10, 2021
    Date of Patent: February 27, 2024
    Assignee: Kioxia Corporation
    Inventors: Masahiro Koike, Masao Shingu, Masaya Ichikawa
  • Patent number: 10297831
    Abstract: An object of the present disclosure is to provide an anode layer for a fluoride ion battery in which decomposition of a binder is restrained. The present disclosure attains the object by providing an anode layer to be used for a fluoride ion battery, the anode layer comprising an anode active material and a non-fluorine-based binder having aromaticity.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: May 21, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, HONDA MOTOR CO., LTD., KYOTO UNIVERSITY
    Inventors: Hirofumi Nakamoto, Masao Ichikawa, Zempachi Ogumi, Takeshi Abe
  • Publication number: 20170352887
    Abstract: An object of the present disclosure is to provide an anode layer for a fluoride ion battery in which decomposition of a binder is restrained. The present disclosure attains the object by providing an anode layer to be used for a fluoride ion battery, the anode layer comprising an anode active material and a non-fluorine-based binder having aromaticity.
    Type: Application
    Filed: May 31, 2017
    Publication date: December 7, 2017
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HONDA MOTOR CO., LTD., KYOTO UNIVERSITY
    Inventors: Hirofumi NAKAMOTO, Masao ICHIKAWA, Zempachi OGUMI, Takeshi ABE
  • Publication number: 20120149555
    Abstract: A method for producing an alloy catalyst for redox reaction comprising alloy particles of platinum and nickel, wherein the alloy particles are equipped at an outer surface with a crystal lattice plane represented by a Miller index {111} and have an average particle diameter in a range of 6 to 20 nm, the method comprising: dissolving, in an alcohol, a salt and/or complex of platinum, a salt and/or complex of nickel, and a polymer containing a plurality of salt structures comprising an organic cation and a halogen anion in a polymer chain and heating the resulting solution to reflux under an inert atmosphere.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 14, 2012
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Ryogo Sakamoto, Kaoru Omichi, Masao Ichikawa
  • Publication number: 20100316937
    Abstract: An alloy catalyst for redox reaction which is capable of obtaining even superior catalytic activity comprises alloy particles of platinum and nickel, wherein the alloy particle is equipped at an outer surface with a crystal lattice plane represented by a Miller index {111}, and has an average particle diameter in a range of from 6 to 20 nm. The alloy particle preferably takes a shape selected from a regular octahedron, a truncated octahedron, a regular tetrahedron, and a truncated tetrahedron.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 16, 2010
    Inventors: Ryogo SAKAMOTO, Kaoru Omichi, Masao Ichikawa
  • Publication number: 20090054228
    Abstract: A catalyst has an underlayer and a platinum layer formed thereon. The underlayer contains a transition metal other than platinum group metals or an alloy thereof. The platinum layer, which contains platinum, has a thickness of at least 0.4 nm but less than 1 nm.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 26, 2009
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Masao ICHIKAWA, Kenji OKAMOTO, Terumi FURUTA, Ryogo SAKAMOTO, Kaoru OMICHI
  • Patent number: 7287311
    Abstract: A manufacturing method of a stator for vehicular rotary electric machine includes: forming an indentation in a radial direction in a side face of each of electrical conductors in the machine by pressing; inserting the electrical conductors in a radially side-by-side relationship with each other in slots of the machine; bending each of the electrical conductors and radially adjacent electrical conductors in different circumferential directions by a predetermined pole pitch such that the indentations formed in respective side faces of the adjacent electrical conductors pass each other in a face-to-face relationship; and bonding on each of the electrical conductors to one end of the adjacent electrical conductors.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: October 30, 2007
    Assignee: DENSO Corporation
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Patent number: 7057315
    Abstract: An alternator for use in an automobile includes a stator supported between a front housing and a rear housing, and a rotor connected to a rotor shaft and rotatably supported inside the stator. A cooling fan is positioned at an end of a pole core of the rotor. The cooling fan is coupled to the rotor shaft by engaging edges of a center opening of the cooling fan with a non-circular flange formed on the rotor shaft. The cooling fan is correctly positioned relative to the rotor shaft, without using a jig, both in the radial direction and in the rotational direction of cooling fan. Noises and vibrations due to rotational imbalance of the cooling fan are suppressed.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: June 6, 2006
    Assignee: Denso Corporation
    Inventors: Hiroshi Ishida, Masao Ichikawa
  • Patent number: 7034429
    Abstract: To secure insulation between electrical conductors at a coil end, a first electrical conductor at one coil end is arranged so as to intersect a radially adjacent second electrical conductor at one point or more. The electrical conductor is formed with radial indentations in side faces that are opposite side faces in opposing electrical conductors at any of the intersecting portions, the indentations having depths that increase toward the near ear of the electrical conductors. Sufficient clearances are thereby secured between electrical conductors in their intersecting portions near their ends where the insulating films are susceptible to damage because of welding heat. Electrical insulation is thus ensured, and the cooling efficiency at the coil end is improved.
    Type: Grant
    Filed: January 3, 2005
    Date of Patent: April 25, 2006
    Assignee: Denso Corporation
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Publication number: 20050285459
    Abstract: An alternator for use in an automobile includes a stator supported between a front housing and a rear housing, and a rotor connected to a rotor shaft and rotatably supported inside the stator. A cooling fan is positioned at an end of a pole core of the rotor. The cooling fan is coupled to the rotor shaft by engaging edges of a center opening of the cooling fan with a non-circular flange formed on the rotor shaft. The cooling fan is correctly positioned relative to the rotor shaft, without using a jig, both in the radial direction and in the rotational direction of cooling fan. Noises and vibrations due to rotational imbalance of the cooling fan are suppressed.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 29, 2005
    Applicant: Denso Corporation
    Inventors: Hiroshi Ishida, Masao Ichikawa
  • Publication number: 20050217105
    Abstract: To secure insulation between electrical conductors at a coil end, a first electrical conductor at one coil end is arranged so as to intersect a radially adjacent second electrical conductor at one point or more. The electrical conductor is formed with radial indentations in side faces that are opposite side faces in opposing electrical conductors at any of the intersecting portions, the indentations having depths that increase toward the near ear of the electrical conductors. Sufficient clearances are thereby secured between electrical conductors in their intersecting portions near their ends where the insulating films are susceptible to damage because of welding heat. Electrical insulation is thus ensured, and the cooling efficiency at the coil end is improved.
    Type: Application
    Filed: May 24, 2005
    Publication date: October 6, 2005
    Applicant: Denso Corporation
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Publication number: 20050116571
    Abstract: To secure insulation between electrical conductors at a coil end, a first electrical conductor at one coil end is arranged so as to intersect a radially adjacent second electrical conductor at one point or more. The electrical conductor is formed with radial indentations in side faces that are opposite side faces in opposing electrical conductors at any of the intersecting portions, the indentations having depths that increase toward the near ear of the electrical conductors. Sufficient clearances are thereby secured between electrical conductors in their intersecting portions near their ends where the insulating films are susceptible to damage because of welding heat. Electrical insulation is thus ensured, and the cooling efficiency at the coil end is improved.
    Type: Application
    Filed: January 3, 2005
    Publication date: June 2, 2005
    Applicant: Denso Corporation
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Patent number: 6897594
    Abstract: To secure insulation between electrical conductors at a coil end, a first electrical conductor at one coil end is arranged so as to intersect a radially adjacent second electrical conductor at one point or more. The electrical conductor is formed with radial indentations in side faces that are opposite side faces in opposing electrical conductors at any of the intersecting portions, the indentations having depths that increase toward the near end of the electrical conductors. Sufficient clearances are thereby secured between electrical conductors in their intersecting portions near their ends where the insulating films are susceptible to damage because of welding heat. Electrical insulation is thus ensured, and the cooling efficiency at the coil end is improved.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: May 24, 2005
    Assignee: Denso Corporation
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Patent number: 6872286
    Abstract: A water electrolyte cell can be used with a high energy efficiency over a long period of time. The water electrolyte cell has a pair of catalytic layers and an electrolyte membrane sandwiched between the catalytic layers. The catalytic layers includes an anode catalytic layer which contains a catalyst comprising an alloy of ruthenium, iridium, and at least one metal selected from the group consisting of iron, nickel, and cobalt, or an oxide of the alloy, or a mixture of the alloy and an oxide thereof. The at least one metal has a molar ratio with respect to ruthenium and iridium in the range from 0.05 to 0.13 mol with respect to 0.8 to 2.2 mols, preferably 1.8 to 2.2 mols, of ruthenium and 0.8 to 1.2 mols of iridium. The electrolyte membrane comprises a solid polymer electrolyte membrane.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 29, 2005
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masao Ichikawa, Kenta Urata, Katsutoshi Nosaki, Masanori Okabe
  • Patent number: 6770393
    Abstract: A proton conducting polymer obtained by blending an organic phosphoric acid compound solution with a meta type polyaniline solution; a solid polymer electrolyte for a fuel cell comprising the proton conducting polymer, which is excellent in proton conductivity, methanol barrier property and dopant stability in an aqueous solution of methanol; and an electrode comprising the proton conducting and fine catalyst particles carried on porous particles.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: August 3, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Akita, Masao Ichikawa, Masaru Iguchi, Hiroyuki Oyanagi
  • Patent number: 6767664
    Abstract: A proton conducting polymer obtained by blending an organic phosphoric acid compound solution with a meta type polyaniline solution; a solid polymer electrolyte for a fuel cell comprising the proton conducting polymer, which is excellent in proton conductivity, methanol barrier property and dopant stability in an aqueous solution of methanol; and an electrode comprising the proton conducting and fine catalyst particles carried on porous particles.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: July 27, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Akita, Masao Ichikawa, Masaru Iguchi, Hiroyuki Oyanagi
  • Patent number: 6710506
    Abstract: An ac generator includes a stator having a stator core with a plurality of slots and a stator winding disposed in the slots and a rotor having trapezoidal claw-shaped pole pieces that alternately extend in opposite directions to interleave each other. In such an ac generator, each pole piece has a chamfered surface at the tip. The chamfered surface increases a distance from the inside surface of the stator core as the chamfered surface becomes away from the circumferential center of the pole pieces. The chamfered surface has narrower area at the front half in the rotation direction than the rear half.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: March 23, 2004
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Atsuo Ishizuka, Masao Ichikawa
  • Publication number: 20030137214
    Abstract: An ac generator includes a stator having a stator core with a plurality of slots and a stator winding disposed in the slots and a rotor having trapezoidal claw-shaped pole pieces that alternately extend in opposite directions to interleave each other. In such an ac generator, each pole piece has a chamfered surface at the tip. The chamfered surface increases a distance from the inside surface of the stator core as the chamfered surface becomes away from the circumferential center of the pole pieces. The chamfered surface has narrower area at the front half in the rotation direction than the rear half.
    Type: Application
    Filed: January 13, 2003
    Publication date: July 24, 2003
    Applicant: DENSO CORPORATION
    Inventors: Atsuo Ishizuka, Masao Ichikawa
  • Publication number: 20030135980
    Abstract: To secure insulation between electrical conductors at a coil end, a first electrical conductor at one coil end is arranged so as to intersect a radially adjacent second electrical conductor at one point or more. The electrical conductor is formed with radial indentations in side faces that are opposite side faces in opposing electrical conductors at any of the intersecting portions, the indentations having depths that increase toward the near end of the electrical conductors. Sufficient clearances are thereby secured between electrical conductors in their intersecting portions near their ends where the insulating films are susceptible to damage because of welding heat. Electrical insulation is thus ensured, and the cooling efficiency at the coil end is improved.
    Type: Application
    Filed: January 14, 2003
    Publication date: July 24, 2003
    Applicant: DENSO CORPORATION
    Inventors: Masao Ichikawa, Yasunori Kitakado, Motohiro Murahashi, Kazuhiko Fukuda, Mitsuru Kato
  • Publication number: 20030057088
    Abstract: A water electrolyte cell can be used with a high energy efficiency over a long period of time. The water electrolyte cell has a pair of catalytic layers and an electrolyte membrane sandwiched between the catalytic layers. The catalytic layers includes an anode catalytic layer which contains a catalyst comprising an alloy of ruthenium, iridium, and at least one metal selected from the group consisting of iron, nickel, and cobalt, or an oxide of the alloy, or a mixture of the alloy and an oxide thereof. The at least one metal has a molar ratio with respect to ruthenium and iridium in the range from 0.05 to 0.13 mol with respect to 0.8 to 2.2 mols, preferably 1.8 to 2.2 mols, of ruthenium and 0.8 to 1.2 mols of iridium. The electrolyte membrane comprises a solid polymer electrolyte membrane.
    Type: Application
    Filed: September 20, 2002
    Publication date: March 27, 2003
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Masao Ichikawa, Kenta Urata, Katsutoshi Nosaki, Masanori Okabe