Patents by Inventor Masahiko Nakayama

Masahiko Nakayama 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).

  • Publication number: 20240090344
    Abstract: A magnetic storage device includes first and second magnetic layers and a non-magnetic layer, where the non-magnetic layer includes a first oxide layer containing magnesium and oxygen, a second oxide layer containing magnesium and oxygen, a third oxide layer containing zinc and oxygen, a fourth oxide layer containing a first predetermined element and oxygen, and a fifth oxide layer containing a second predetermined element and oxygen, and a crystal structure of an oxide of the first predetermined element and a crystal structure of an oxide of the second predetermined element are each a rock salt structure. The first predetermined element and the second predetermined element each have an oxide formation free energy greater than an oxide formation free energy of zinc, and the oxide of the first predetermined element and the oxide of the second predetermined element each have a bandgap narrower than a bandgap of an oxide of magnesium.
    Type: Application
    Filed: March 3, 2023
    Publication date: March 14, 2024
    Inventors: Takeo KOIKE, Rina NOMOTO, Hiroyuki KANAYA, Masahiko NAKAYAMA, Daisuke WATANABE
  • Patent number: 11856791
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: December 26, 2023
    Assignee: Kioxia Corporation
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Gaku Sudo, Tadashi Kai
  • Publication number: 20230380183
    Abstract: A magnetic memory device including a first memory cell which includes a first stacked structure including a magnetic layer and a second memory cell which is provided on the first memory cell and includes a second stacked structure including a magnetic layer. Each of the first stacked structure and the second stacked structure includes a first magnetic layer having a variable magnetization direction, a second magnetic layer having a fixed magnetization direction, and a nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. A concentration of iron (Fe) contained in the first magnetic layer included in the first stacked structure and a concentration of iron (Fe) contained in the first magnetic layer included in the second stacked structure are different from each other.
    Type: Application
    Filed: August 1, 2023
    Publication date: November 23, 2023
    Applicant: Kioxia Corporation
    Inventors: Masayoshi IWAYAMA, Tatsuya KISHI, Masahiko NAKAYAMA, Toshihiko NAGASE, Daisuke WATANABE, Tadashi KAI
  • Publication number: 20230302716
    Abstract: Provided are a sheet material in which a skin material can be adhered to a base material. A sheet material 2 for forming a design surface of a product by being adhered to base materials 68a, 68b includes a sheet-like skin material 20, and a sheet-like stretchable material 25 laminated on a rear surface side of the skin material 20 and having higher stretchability than the skin material 20. The stretchable material 25 has a rectangular shape in plan view, and include grippable areas 27a, 27b, 27c, 27d on which the skin material 20 is not laminated and which are respectively provided in portions including four edge sides 26a, 26b, 26c, 26d facing each other in plan view. In the skin material 20, five linear cut portions 24a, 24b, 24c, 24d, 24e are formed in a non-design area 23 other than the design areas 22a, 22b.
    Type: Application
    Filed: February 23, 2023
    Publication date: September 28, 2023
    Inventors: Yushi SHINNO, Daichi TSUNODA, Shiori ABE, Masahiko NAKAYAMA
  • Publication number: 20230309428
    Abstract: A storage device includes a memory cell including a variable resistance element and a switching element having snapback current-voltage characteristics. The switching element includes a first conductive layer in contact with the variable resistance element, a second conductive layer, and a switching layer provided between the first conductive layer and the second conductive layer. The switching layer includes at least one switching member and a first insulating layer having a thermal conductivity higher than 1.4 W/m/K. A cross-sectional area of the switching member at a connection surface between the switching layer and the first conductive layer and a cross-sectional area of the switching member at a connection surface between the switching layer and the second conductive layer are each smaller than a cross-sectional area at a connection surface between the first conductive layer and the variable resistance element.
    Type: Application
    Filed: August 31, 2022
    Publication date: September 28, 2023
    Inventors: Kenji FUKUDA, Rina NOMOTO, Hiroyuki KANAYA, Masahiko NAKAYAMA, Hideyuki SUGIYAMA
  • Patent number: 11758739
    Abstract: A magnetic memory device including a first memory cell which includes a first stacked structure including a magnetic layer and a second memory cell which is provided on the first memory cell and includes a second stacked structure including a magnetic layer. Each of the first stacked structure and the second stacked structure includes a first magnetic layer having a variable magnetization direction, a second magnetic layer having a fixed magnetization direction, and a nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. A concentration of iron (Fe) contained in the first magnetic layer included in the first stacked structure and a concentration of iron (Fe) contained in the first magnetic layer included in the second stacked structure are different from each other.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: September 12, 2023
    Assignee: Kioxia Corporation
    Inventors: Masayoshi Iwayama, Tatsuya Kishi, Masahiko Nakayama, Toshihiko Nagase, Daisuke Watanabe, Tadashi Kai
  • Patent number: 11742020
    Abstract: A storage device includes a memory cell array in which a plurality of memory cells respectively including a variable resistance memory element are divided into a plurality of memory blocks, the plurality of memory cells including a first memory cell and a second memory cell that are in the same memory block, and a detection circuit. During a read operation in which the first memory cell is a read target, the detection circuit compares a first resistance value, which is a resistance value of the variable resistance memory element in the first memory cell, with a second resistance value, which is a resistance value of the variable resistance memory element in the second memory cell, and determines a value of data stored in the first memory cell based on whether or not the first resistance value is higher or lower than the second resistance value.
    Type: Grant
    Filed: August 30, 2021
    Date of Patent: August 29, 2023
    Assignee: Kioxia Corporation
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi
  • Publication number: 20230189661
    Abstract: A switching element includes a first conductive layer, a second conductive layer, and a switching material layer provided between the first conductive layer and the second conductive layer and formed of an insulating material containing an additional element. The switching material layer includes a first interface region including a first interface between the first conductive layer and the switching material layer and a second interface region including a second interface between the second conductive layer and the switching material layer. A concentration of the additional element in the switching material layer has a first peak in the first interface region.
    Type: Application
    Filed: August 30, 2022
    Publication date: June 15, 2023
    Inventors: Shogo ITAI, Kazuya MATSUZAWA, Masahiko NAKAYAMA, Hiroyuki KANAYA, Hideyuki SUGIYAMA
  • Patent number: 11676661
    Abstract: According to one embodiment, a storage device includes first wirings extending in a first direction and second wirings extending in a second direction. A memory cells are connected between the first wirings and the second wirings and include a variable resistance memory element. A first drive circuit is provided for supplying voltages to the first wirings, and a second drive circuit is provided for supplying voltages to the second wirings. The first drive circuit applies a first voltage to a selected first wiring, the second drive circuit applies a second voltage to a selected second wiring. A voltage between the second voltage and one-half of the sum of the first and second voltages is applied to a non-selected first wiring, and a voltage between the first voltage and one-half of the sum of the first and second voltages is applied to a non-selected second wiring.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: June 13, 2023
    Assignee: Kioxia Corporation
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Jyunichi Ozeki
  • Patent number: 11654839
    Abstract: An instrument panel unit (2) includes an instrument panel (3) and a decorative sheet (4). The instrument panel (3) includes a sticking portion (3a) and an exposed portion (3b). A plurality of insertion grooves 3c and insertion holes 3d are formed alternately at an end on a rear side of the sticking portion (3a), into which bent pieces (4a) formed at a rear end of the decorative sheet (4) are inserted. A groove front-surface (3g) forming the insertion groove (3c) of the instrument panel (3) is formed in a tapered shape such that a width between the groove front-surface and an opposing groove rear-surface (3h) gradually increases upwardly. The bent piece (4a) is formed to be thinner than the groove width at the upper part serving as the entrance part of the insertion groove (3c) and to be thicker than the groove width of a groove bottom-surface (3i).
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: May 23, 2023
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Atsushi Yusa, Kenichi Chujo, Yusuke Takamura, Hajime Miyamoto, Toshio Kazami, Satoru Iriyama, Masahiko Nakayama
  • Patent number: 11648718
    Abstract: An instrument panel unit (2) includes an instrument panel (3) and a decorative sheet (4). The instrument panel (3) includes a sticking portion (3a) and an exposed portion (3b). A plurality of insertion grooves (3c) and insertion holes (3d), into which bent pieces (4a) formed at rear end of the decorative sheet (4) are inserted, are formed alternately on a rear side end of the sticking portion (3a). A groove front-surface (3g) forming the insertion groove (3c) of the instrument panel (3) is formed in a tapered shape such that a width between the groove front-surface and an opposing groove rear-surface (3h) gradually increases upward. The bent piece (4a) of the decorative sheet (4) is thinner than a groove width at an upper part serving as an entrance part of the insertion groove (3c) and thicker than the groove width of a groove bottom-surface (3i) in the insertion groove (3c).
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: May 16, 2023
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Atsushi Yusa, Yusuke Takamura, Kenichi Chujo, Hajime Miyamoto, Toshio Kazami, Satoru Iriyama, Masahiko Nakayama
  • Publication number: 20230079445
    Abstract: According to one embodiment, a memory device includes a first memory cell, a second memory cell adjacent to the first memory cell in a first direction, and a third memory cell adjacent to the first memory cell in a second direction, each of the first, second, and third memory cells including a resistance change memory element and a switching element. The switching element includes first and second electrodes, and a switching material layer between the first and second electrodes, the first and second electrodes overlap each other when viewed from the first direction, the first electrodes in the first and second memory cells are apart from each other, and the switching material layers in the first and second memory cells are continuously provided.
    Type: Application
    Filed: March 11, 2022
    Publication date: March 16, 2023
    Applicant: Kioxia Corporation
    Inventors: Kenji FUKUDA, Hideyuki SUGIYAMA, Masahiko NAKAYAMA, Hiroyuki KANAYA, Soichi OIKAWA
  • Publication number: 20220301621
    Abstract: A storage device includes a memory cell array in which a plurality of memory cells respectively including a variable resistance memory element are divided into a plurality of memory blocks, the plurality of memory cells including a first memory cell and a second memory cell that are in the same memory block, and a detection circuit. During a read operation in which the first memory cell is a read target, the detection circuit compares a first resistance value, which is a resistance value of the variable resistance memory element in the first memory cell, with a second resistance value, which is a resistance value of the variable resistance memory element in the second memory cell, and determines a value of data stored in the first memory cell based on whether or not the first resistance value is higher or lower than the second resistance value.
    Type: Application
    Filed: August 30, 2021
    Publication date: September 22, 2022
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI
  • Publication number: 20220293171
    Abstract: According to one embodiment, a storage device includes first wirings extending in a first direction and second wirings extending in a second direction. A memory cells are connected between the first wirings and the second wirings and include a variable resistance memory element. A first drive circuit is provided for supplying voltages to the first wirings, and a second drive circuit is provided for supplying voltages to the second wirings. The first drive circuit applies a first voltage to a selected first wiring, the second drive circuit applies a second voltage to a selected second wiring. A voltage between the second voltage and one-half of the sum of the first and second voltages is applied to a non-selected first wiring, and a voltage between the first voltage and one-half of the sum of the first and second voltages is applied to a non-selected second wiring.
    Type: Application
    Filed: August 27, 2021
    Publication date: September 15, 2022
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI, Jyunichi OZEKI
  • Publication number: 20220278168
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Application
    Filed: May 20, 2022
    Publication date: September 1, 2022
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI, Gaku SUDO, Tadashi KAI
  • Patent number: 11367748
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: June 21, 2022
    Assignee: KIOXIA CORPORATION
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Gaku Sudo, Tadashi Kai
  • Publication number: 20220105880
    Abstract: Interior material for vehicle including a foamed sheet layer having a foam surface opposing a first rear surface of the first sheet layer, a first sheet layer joined along the foam surface, and a second sheet layer joined to a part of a first surface of the first sheet layer, bonded together while a surface boundary of the first sheet layer and the second sheet layer is kept linear, in which a first surface of the first sheet layer has a joined portion having a width dimension substantially the same as that of the second sheet layer and formed linearly, and a surface treated layer formed excluding the joined portion, and the second sheet layer joined along the joined portion and bonded together by a pressing force with a second surface of the second sheet layer and a foam rear surface of the foamed sheet layer as pressure receiving surfaces.
    Type: Application
    Filed: October 4, 2021
    Publication date: April 7, 2022
    Applicants: HONDA MOTOR CO., LTD., OKAMOTO INDUSTRIES, INC.
    Inventors: Hajime MIYAMOTO, Masahiko NAKAYAMA, Shoichiro NEGISHI, Yasuki KAMO, Fumihiko INOUE
  • Publication number: 20220085276
    Abstract: According to one embodiment, a magnetic memory device includes a magnetoresistance effect element including a first magnetic layer having a variable magnetization direction, a second magnetic layer having a variable magnetization direction, a third magnetic layer having a fixed magnetization direction and a nonmagnetic layer, the first magnetic layer being provided between the second and third magnetic layers, and the nonmagnetic layer being provided between the first and third magnetic layers. The second magnetic layer has a superlattice structure in which first element layers and second element layers are alternately stacked. The first element is Co, and the second element is selected from Pt, Ni and Pd, and the second magnetic layer contains Cr as a third element.
    Type: Application
    Filed: December 10, 2020
    Publication date: March 17, 2022
    Applicant: Kioxia Corporation
    Inventors: Masaru TOKO, Hideyuki SUGIYAMA, Soichi OIKAWA, Masahiko NAKAYAMA
  • Patent number: 11171175
    Abstract: According to one embodiment, a magnetic device includes a stacked body including a first magnetic layer, a second magnetic layer, and a non-magnetic layer between the first magnetic layer and the second magnetic layer. The stacked body has a quadrangular planar shape, the stacked body has a first side dimension in a first direction parallel to a surface of a substrate and a thickness in a second direction perpendicular to the surface of the substrate, and a ratio of the first side dimension to the thickness is in a range of 0.10 to 4.0.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: November 9, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Tadashi Kai, Masahiko Nakayama, Jyunichi Ozeki, Shogo Itai
  • Publication number: 20210335888
    Abstract: A magnetic memory device including a first memory cell which includes a first stacked structure including a magnetic layer and a second memory cell which is provided on the first memory cell and includes a second stacked structure including a magnetic layer. Each of the first stacked structure and the second stacked structure includes a first magnetic layer having a variable magnetization direction, a second magnetic layer having a fixed magnetization direction, and a nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. A concentration of iron (Fe) contained in the first magnetic layer included in the first stacked structure and a concentration of iron (Fe) contained in the first magnetic layer included in the second stacked structure are different from each other.
    Type: Application
    Filed: July 9, 2021
    Publication date: October 28, 2021
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Masayoshi IWAYAMA, Tatsuya KISHI, Masahiko NAKAYAMA, Toshihiko NAGASE, Daisuke WATANABE, Tadashi KAI