Patents by Inventor Takuyo NAKAYAMA

Takuyo 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).

  • Patent number: 11616072
    Abstract: According to one embodiment, a semiconductor memory device includes a first stacked body in which a plurality of first conductive layers are stacked at intervals in a first direction above a semiconductor substrate; a second stacked body in which a plurality of second conductive layers are stacked at intervals in the first direction above the semiconductor substrate; and a first slit extending in a second direction perpendicular to the first direction, the first slit isolating the first stacked body and the second stacked body in a third direction perpendicular to the first and second directions.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: March 28, 2023
    Assignee: Kioxia Corporation
    Inventors: Tetsuya Yamashita, Takuyo Nakayama, Takashi Ichikawa, Tadayoshi Uechi, Takashi Izumida
  • Publication number: 20220223607
    Abstract: A semiconductor memory device according to an embodiment includes a substrate, first conductive layers, and an insulating layer. The first conductive layers include terraced portions. The insulating layer is provided on the terraced portions. The first conductive layers include first to third layer groups. The first layer group is located the highest among the three or more layer groups. The insulating layer includes first to third portions. The first portion is sandwiched by the first layer group. The second portion is sandwiched by the second layer group. The third portion is sandwiched by the third layer group. The second portion is shifted to one side of a direction and the third portion is shifted to the other side of the direction with respect to the first portion.
    Type: Application
    Filed: September 9, 2021
    Publication date: July 14, 2022
    Applicant: Kioxia Corporation
    Inventors: Takuyo NAKAYAMA, Takashi ICHIKAWA, Yutaro OGAWA
  • Publication number: 20220216228
    Abstract: According to one embodiment, a semiconductor memory device includes a first stacked body in which a plurality of first conductive layers are stacked at intervals in a first direction above a semiconductor substrate; a second stacked body in which a plurality of second conductive layers are stacked at intervals in the first direction above the semiconductor substrate; and a first slit extending in a second direction perpendicular to the first direction, the first slit isolating the first stacked body and the second stacked body in a third direction perpendicular to the first and second directions.
    Type: Application
    Filed: March 23, 2022
    Publication date: July 7, 2022
    Applicant: Kioxia Corporation
    Inventors: Tetsuya YAMASHITA, Takuyo NAKAYAMA, Takashi ICHIKAWA, Tadayoshi UECHI, Takashi IZUMIDA
  • Patent number: 11355510
    Abstract: According to one embodiment, a semiconductor memory device includes a first stacked body in which a plurality of first conductive layers are stacked at intervals in a first direction above a semiconductor substrate; a second stacked body in which a plurality of second conductive layers are stacked at intervals in the first direction above the semiconductor substrate; and a first slit extending in a second direction perpendicular to the first direction, the first slit isolating the first stacked body and the second stacked body in a third direction perpendicular to the first and second directions.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: June 7, 2022
    Assignee: Kioxia Corporation
    Inventors: Tetsuya Yamashita, Takuyo Nakayama, Takashi Ichikawa, Tadayoshi Uechi, Takashi Izumida
  • Publication number: 20210091044
    Abstract: According to one embodiment, a semiconductor memory device includes a first stacked body in which a plurality of first conductive layers are stacked at intervals in a first direction above a semiconductor substrate; a second stacked body in which a plurality of second conductive layers are stacked at intervals in the first direction above the semiconductor substrate; and a first slit extending in a second direction perpendicular to the first direction, the first slit isolating the first stacked body and the second stacked body in a third direction perpendicular to the first and second directions.
    Type: Application
    Filed: February 26, 2020
    Publication date: March 25, 2021
    Applicant: Kioxia Corporation
    Inventors: Tetsuya YAMASHITA, Takuyo NAKAYAMA, Takashi ICHIKAWA, Tadayoshi UECHI, Takashi IZUMIDA