Patents by Inventor Yasuyuki KATSUMATA

Yasuyuki KATSUMATA 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).

  • NONVOLATILE SEMICONDUCTOR MEMORY DEVICE AND MANUFACTURING METHOD THEREOF
    Publication number: 20240138150
    Abstract: A nonvolatile semiconductor memory device that have a new structure are provided, in which memory cells are laminated in a three dimensional state so that the chip area may be reduced. The nonvolatile semiconductor memory device of the present invention is a nonvolatile semiconductor memory device that has a plurality of the memory strings, in which a plurality of electrically programmable memory cells is connected in series. The memory strings comprise a pillar shaped semiconductor; a first insulation film formed around the pillar shaped semiconductor; a charge storage layer formed around the first insulation film; the second insulation film formed around the charge storage layer; and first or nth electrodes formed around the second insulation film (n is natural number more than 1). The first or nth electrodes of the memory strings and the other first or nth electrodes of the memory strings are respectively the first or nth conductor layers that are spread in a two dimensional state.
    Type: Application
    Filed: December 28, 2023
    Publication date: April 25, 2024
    Applicant: Kioxia Corporation
    Inventors: Masaru KITO, Hideaki AOCHI, Ryota KATSUMATA, Akihiro NITAYAMA, Masaru KIDOH, Hiroyasu TANAKA, Yoshiaki FUKUZUMI, Yasuyuki MATSUOKA, Mitsuru SATO
  • Magnesium alloy member
    Patent number: 8845848
    Abstract: There is provided a magnesium alloy member that includes an aluminum-containing magnesium alloy material. The magnesium alloy material has a modified layer formed at a surface thereof in such a manner that at least a surface of the modified layer has a higher aluminum content than that of any unmodified base portion of the magnesium alloy material.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: September 30, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Akihisa Hori, Hiroshi Kumagai, Yasuyuki Katsumata
  • MAGNESIUM ALLOY MEMBER
    Publication number: 20120055629
    Abstract: There is provided a magnesium alloy member that includes an aluminum-containing magnesium alloy material. The magnesium alloy material has a modified layer formed at a surface thereof in such a manner that at least a surface of the modified layer has a higher aluminum content than that of any unmodified base portion of the magnesium alloy material.
    Type: Application
    Filed: November 14, 2011
    Publication date: March 8, 2012
    Inventors: Akihisa HORI, Hiroshi Kumagai, Yasuyuki Katsumata
  • MAGNESIUM ALLOY MEMBER
    Publication number: 20110003162
    Abstract: There is provided a magnesium alloy member that includes an aluminum-containing magnesium alloy material. The magnesium alloy material has a modified layer formed at a surface thereof in such a manner that at least a surface of the modified layer has a higher aluminum content than that of any unmodified base portion of the magnesium alloy material.
    Type: Application
    Filed: July 1, 2010
    Publication date: January 6, 2011
    Inventors: Akihisa HORI, Hiroshi KUMAGAI, Yasuyuki KATSUMATA