Patents by Inventor Mutsumi Okajima

Mutsumi Okajima 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: 20220310581
    Abstract: According to one embodiment, a memory device includes: a first chip including a first insulating layer and a first pad; a plurality of memory units provided in a first area of the first insulating layer and arranged at first intervals in a first direction parallel to a surface of the first chip; a plurality of mark portions provided in a second area of the first insulating layer and arranged at second intervals in the first direction; a second chip including a second pad connected to the first pad and overlapping the first chip in a second direction perpendicular to the surface of the first chip; and a circuit provided in the second chip.
    Type: Application
    Filed: June 13, 2022
    Publication date: September 29, 2022
    Applicant: Kioxia Corporation
    Inventor: Mutsumi OKAJIMA
  • Publication number: 20220310612
    Abstract: A semiconductor memory device includes a plurality of memory portions arranged in a first direction, a plurality of semiconductor layers arranged in the first direction and electrically connected to the plurality of memory portions respectively, a plurality of gate electrodes arranged in the first direction and opposed to the plurality of semiconductor layers respectively, a gate insulating film disposed between the plurality of semiconductor layers and the plurality of gate electrodes, a first wiring extending in the first direction and connected to the plurality of gate electrodes, and a plurality of second wirings arranged in the first direction and connected to the plurality of semiconductor layers respectively. The plurality of semiconductor layers are opposed to surfaces on one side and the other side of each of the plurality of gate electrodes in the first direction via the gate insulating film.
    Type: Application
    Filed: September 3, 2021
    Publication date: September 29, 2022
    Applicant: Kioxia Corporation
    Inventor: Mutsumi OKAJIMA
  • Publication number: 20220310613
    Abstract: According to one embodiment, a device includes: a circuit on a first surface of a substrate and including a first contact; an aluminum oxide layer above the substrate in a first direction perpendicular to the first surface; a cell including a capacitor provided in the aluminum oxide layer; a first conductive layer provided between the substrate and the aluminum oxide layer in the first direction and connected to the cell; a first insulating layer between the first conductive layer and the substrate in the first direction; a second insulating layer adjacent to the aluminum oxide layer in a second direction parallel to the first surface and provided above the substrate in the first direction; and a second contact in the second insulating layer and above the first contact in the first direction to connect the cell to the first contact.
    Type: Application
    Filed: September 10, 2021
    Publication date: September 29, 2022
    Applicant: Kioxia Corporation
    Inventors: Mutsumi OKAJIMA, Yasuaki OOTERA, Tsutomu NAKANISHI
  • Publication number: 20220302208
    Abstract: A storage device includes: a memory unit and a first pillar. The first pillar includes: a first region having a third portion between a first and a second portion respectively having a first and a second maximum diameter, and having a first minimum diameter, the first and second portions defining a first distance; a second region having a sixth portion between a fourth and a fifth portion respectively having a third and a fourth maximum diameter, and having a second minimum diameter, the fourth and fifth portions defining a second distance; and a third region between the first and second regions, having a ninth portion between a seventh and an eighth portion respectively having a fifth and a sixth maximum diameter, and having a third minimum diameter, the seventh and eighth portions defining a third distance shorter than each of the first and second distances.
    Type: Application
    Filed: September 3, 2021
    Publication date: September 22, 2022
    Applicant: Kioxia Corporation
    Inventors: Tsutomu NAKANISHI, Yasuaki OOTERA, Nobuyuki UMETSU, Michael Arnaud QUINSAT, Masaki KADO, Susumu HASHIMOTO, Shiho NAKAMURA, Naoharu SHIMOMURA, Tsuyoshi KONDO, Mutsumi OKAJIMA
  • Publication number: 20220285350
    Abstract: According to one embodiment, a memory includes: a first transistor including: a first semiconductor between the substrate and the bit line; and a first gate facing a side of the first semiconductor; a first memory element between the first transistor and the substrate; a first word line including a first conductor coupled to the first gate; a second transistor including: a second semiconductor between the substrate and the bit line; and a second gate facing a side of the second semiconductor; a second memory element between the second transistor and the substrate; and a second word line being adjacent to the first word line in a first direction and including a second conductor coupled to the second gate. The second semiconductor is adjacent to the first semiconductor in a second direction intersecting the first direction.
    Type: Application
    Filed: May 25, 2022
    Publication date: September 8, 2022
    Applicant: Kioxia Corporation
    Inventors: Mutsumi Okajima, Tsuneo Inaba, Hiromitsu Mashita
  • Patent number: 11387227
    Abstract: According to one embodiment, a memory device includes: a first chip including a first insulating layer and a first pad; a plurality of memory units provided in a first area of the first insulating layer and arranged at first intervals in a first direction parallel to a surface of the first chip; a plurality of mark portions provided in a second area of the first insulating layer and arranged at second intervals in the first direction; a second chip including a second pad connected to the first pad and overlapping the first chip in a second direction perpendicular to the surface of the first chip; and a circuit provided in the second chip.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: July 12, 2022
    Assignee: Kioxia Corporation
    Inventor: Mutsumi Okajima
  • Publication number: 20210313340
    Abstract: A memory device includes a first conductor and a charge storage film extending along a first direction; a first semiconductor of a first conductive type; a second and third semiconductor each of a second conductive type; and a stack comprising a second conductor, a first insulator, and a third conductor sequentially stacked along the first direction and each extending along a second direction. The first conductor, the charge storage film, the first semiconductor, and the stack are arranged in this order along a third direction. The second semiconductor is in contact with the first semiconductor and the second conductor, between the second conductor or the first insulator and the charge storage film.
    Type: Application
    Filed: June 16, 2021
    Publication date: October 7, 2021
    Applicant: Kioxia Corporation
    Inventor: Mutsumi OKAJIMA
  • Publication number: 20210305230
    Abstract: According to one embodiment, a memory device includes: a first chip including a first insulating layer and a first pad; a plurality of memory units provided in a first area of the first insulating layer and arranged at first intervals in a first direction parallel to a surface of the first chip; a plurality of mark portions provided in a second area of the first insulating layer and arranged at second intervals in the first direction; a second chip including a second pad connected to the first pad and overlapping the first chip in a second direction perpendicular to the surface of the first chip; and a circuit provided in the second chip.
    Type: Application
    Filed: September 10, 2020
    Publication date: September 30, 2021
    Applicant: KIOXIA CORPORATION
    Inventor: Mutsumi OKAJIMA
  • Publication number: 20210280635
    Abstract: A magnetic memory of an embodiment includes: a first magnetic member including a first and second portions and extending in a first direction; a first and second wirings disposed to be apart from the first magnetic member and extending in a second direction intersecting the first direction, the first and the second wirings being separated from each other in a third direction intersecting the first and second directions, the first magnetic member being disposed to be apart from a region between the first wiring and the second wiring in the first direction; and a second magnetic member surrounding at least parts of the first and second wirings, the second magnetic member including a third portion located to be more distant from the first magnetic member, a fourth portion located to be closer to the first magnetic member, and a fifth portion located in the region.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 9, 2021
    Applicant: Kioxia Corporation
    Inventors: Hiroki TOKUHIRA, Tsuyoshi KONDO, Mutsumi OKAJIMA, Yoshihiro UEDA
  • Publication number: 20210225847
    Abstract: A semiconductor memory device, includes: a first region including a first memory cell array; a second region arranged with the first region; and a third region arranged with the second region and including a second memory cell array. Each memory cell array includes: a field effect transistor above a semiconductor substrate, including a gate, a source, and a drain, the gate being connected to a first wiring, and one of the source and the drain being connected to a second wiring; and a capacitor below the transistor, including a first electrode connected to the other of the source and the drain, a second, electrode facing the first electrode, and a third electrode connected to the second electrode and extending to the second region. The second region includes a conductor, the conductor connecting the third electrodes of the memory cell arrays.
    Type: Application
    Filed: September 4, 2020
    Publication date: July 22, 2021
    Applicant: Kioxia Corporation
    Inventors: Masaharu WADA, Mutsumi OKAJIMA, Tsuneo INABA, Shinji MIYANO
  • Publication number: 20210091108
    Abstract: According to one embodiment, a device includes a stack above a substrate in a first direction perpendicular to a surface of the substrate, the stack including conductive layers; a semiconductor layer neighboring the stack in a second direction parallel to the surface of the substrate; a memory layer between the first stack and the semiconductor layer; memory cells between the conductive layers and the semiconductor layer; a first transistor connected between one end of the semiconductor layer in a third direction parallel to the surface of the substrate and crossing the second direction and a first interconnect in the first direction; and a second transistor connected between the other end of the semiconductor layer and a second interconnect in the first direction.
    Type: Application
    Filed: March 12, 2020
    Publication date: March 25, 2021
    Applicant: Kioxia Corporation
    Inventors: Kiyomi NARUKE, Shinichiro Shiratake, Mutsumi Okajima, Hidetoshi Saito, Hirofumi Inoue
  • Publication number: 20190296084
    Abstract: A storage device includes a substrate; a plurality of insulating layers extending in a first direction; a plurality of first conductive layers extending in the first direction, and stacked alternately with the plurality of insulating layers along a second direction that intersects the first direction and is perpendicular to the substrate; a second conductive layer extending in the second direction; a recording layer provided between the second conductive layer and the plurality of first conductive layers; a first transistor electrically connected to the second conductive layer; a second transistor provided adjacent to the first transistor in a third direction that intersects the first direction and the second direction and is parallel to the substrate; and a first insulator provided on the second transistor.
    Type: Application
    Filed: September 6, 2018
    Publication date: September 26, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Shota MOMBETSU, Akira YOTSUMOTO, Tetsu MOROOKA, Mutsumi OKAJIMA
  • Patent number: 10332935
    Abstract: A storage apparatus according to embodiments includes: a first interlayer insulating film extending in a first direction; a second interlayer insulating film extending in the first direction; a first conductive layer extending in the first direction and provided between the first interlayer insulating film and the second interlayer insulating film; a second conductive layer extending in a second direction intersecting the first direction; a resistance change layer including a first portion provided between the first interlayer insulating film and the second interlayer insulating film and including a second portion provided between the second conductive layer and the first interlayer insulating film, between the second conductive layer and the first conductive layer, and between the second conductive layer and the second interlayer insulating film; and a sidewall insulating film provided between the first portion and the first interlayer insulating film and between the first portion and the second interlayer i
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: June 25, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Takayuki Ishikawa, Mutsumi Okajima, Takayuki Tsukamoto
  • Patent number: 10325958
    Abstract: A memory device includes a first interconnect extending in a first direction, semiconductor members extending in a second direction, a second interconnect provided between the semiconductor members and extending in a third direction, a first insulating film provided between the semiconductor member and the second interconnect, third interconnects extending in the second direction, fourth interconnects provided between the third interconnects and arranged along the second direction, a resistance change film provided between the third interconnect and the fourth interconnects, and a first film. The first film is provided between the second interconnect and the fourth interconnect, interposes between the semiconductor member and the resistance change film, and not interpose between the semiconductor member and the third interconnect connected to each other. A first end of the semiconductor member is connected to the first interconnect.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: June 18, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Kotaro Noda, Mutsumi Okajima
  • Patent number: 10269433
    Abstract: A memory device according to an embodiment includes word lines stacked in a third direction perpendicular to a first direction and a second direction; main bit lines including a first main bit line and extending in the second direction; transistors including first and second transistors of which the channel width is greater than the width of the main bit lines; sub-bit lines extending in the third direction and including a first sub-bit line electrically connected to the first main bit line, with the first transistor interposed therebetween, and a second sub-bit line electrically connected to the first main bit line, with the second transistor interposed therebetween, and being adjacent to the first sub-bit line, a line segment virtually connecting the first sub-bit line and the second sub-bit line intersecting the second direction; and a resistance-change layer provided between the word lines and the sub-bit lines.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: April 23, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventor: Mutsumi Okajima
  • Publication number: 20190088334
    Abstract: A memory device according to an embodiment includes word lines stacked in a third direction perpendicular to a first direction and a second direction; main bit lines including a first main bit line and extending in the second direction; transistors including first and second transistors of which the channel width is greater than the width of the main bit lines; sub-bit lines extending in the third direction and including a first sub-bit line electrically connected to the first main bit line, with the first transistor interposed therebetween, and a second sub-bit line electrically connected to the first main bit line, with the second transistor interposed therebetween, and being adjacent to the first sub-bit line, a line segment virtually connecting the first sub-bit line and the second sub-bit line intersecting the second direction; and a resistance-change layer provided between the word lines and the sub-bit lines.
    Type: Application
    Filed: March 20, 2018
    Publication date: March 21, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventor: Mutsumi Okajima
  • Publication number: 20190088720
    Abstract: A storage apparatus according to embodiments includes: a first interlayer insulating film extending in a first direction; a second interlayer insulating film extending in the first direction; a first conductive layer extending in the first direction and provided between the first interlayer insulating film and the second interlayer insulating film; a second conductive layer extending in a second direction intersecting the first direction; a resistance change layer including a first portion provided between the first interlayer insulating film and the second interlayer insulating film and including a second portion provided between the second conductive layer and the first interlayer insulating film, between the second conductive layer and the first conductive layer, and between the second conductive layer and the second interlayer insulating film; and a sidewall insulating film provided between the first portion and the first interlayer insulating film and between the first portion and the second interlayer i
    Type: Application
    Filed: March 21, 2018
    Publication date: March 21, 2019
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Takayuki ISHIKAWA, Mutsumi OKAJIMA, Takayuki TSUKAMOTO
  • Patent number: 10211259
    Abstract: A semiconductor memory device according to an embodiment comprises: a semiconductor substrate extending in a first direction and a second direction, the first and second directions intersecting each other; a first wiring line disposed above the semiconductor substrate and extending in the first direction; a second wiring line disposed above the semiconductor substrate and extending in a third direction, the third direction intersecting the first direction and the second direction; a variable resistance film disposed at an intersection of the first wiring line and the second wiring line; a first insulating film disposed aligned with the second wiring line in the first direction; a first film disposed between the first wiring line and the first insulating film; and a second film disposed between the first insulating film and the first film and configured from a material different from that of the first film.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: February 19, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Atsushi Oga, Mutsumi Okajima, Natsuki Fukuda, Takeshi Yamaguchi, Toshiharu Tanaka, Hiroyuki Ode
  • Patent number: 10192928
    Abstract: A semiconductor device according to an embodiment includes: a stacked body including a plurality of first conductive films stacked via an inter-layer insulating film; a first conductive body contacting the stacked body to extend in a stacking direction; and a plurality of first insulating films in the same layers as the first conductive films and disposed between the first conductive body and the first conductive films, the first conductive body including a projecting part that projects along tops of one of the first insulating films and one of the first conductive films, and a side surface of the projecting part contacting an upper surface of the one of the first conductive films.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 29, 2019
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Natsuki Fukuda, Mutsumi Okajima, Atsushi Oga, Toshiharu Tanaka, Takeshi Yamaguchi, Takeshi Takagi, Masanori Komura
  • Publication number: 20180069050
    Abstract: A memory device includes a first interconnect extending in a first direction, semiconductor members extending in a second direction, a second interconnect provided between the semiconductor members and extending in a third direction, a first insulating film provided between the semiconductor member and the second interconnect, third interconnects extending in the second direction, fourth interconnects provided between the third interconnects and arranged along the second direction, a resistance change film provided between the third interconnect and the fourth interconnects, and a first film. The first film is provided between the second interconnect and the fourth interconnect, interposes between the semiconductor member and the resistance change film, and not interpose between the semiconductor member and the third interconnect connected to each other. A first end of the semiconductor member is connected to the first interconnect.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Applicant: TOSHIBA MEMORY CORPORATION
    Inventors: Kotaro NODA, Mutsumi OKAJIMA