Patents by Inventor Ryota Katsumata

Ryota 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).

  • Patent number: 11974439
    Abstract: A semiconductor memory includes a memory cell region that includes multiple memory cells stacked above a semiconductor substrate, first and second dummy regions on opposite sides of the memory cell region, each dummy region including multiple dummy cells stacked above the semiconductor substrate, and a wiring that electrically connects dummy cells of the first and second dummy regions that are at a same level above the semiconductor substrate.
    Type: Grant
    Filed: November 21, 2022
    Date of Patent: April 30, 2024
    Assignee: KIOXIA CORPORATION
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • 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
  • Publication number: 20240117607
    Abstract: A working machine includes: a working machine body; a first working unit (boom) having one end connected to the working machine body, and configured to be displaced relative to the working machine body; a second working unit (arm) connected to another end of the first working unit via a link; a third working unit (bucket) connected to the second working unit via a link; an image capturing unit provided on the working machine body, and configured to capture an image of one end of the second working unit that is located near the first working unit; and a position detecting unit configured to detect a position of another end of the second working unit that is located near the third working unit based on the image captured by the image capturing unit.
    Type: Application
    Filed: August 17, 2023
    Publication date: April 11, 2024
    Inventors: Nozomu ARAKI, Yuki KURISU, Tomio SHIGAKI, Ryota KATSUMATA
  • Patent number: 11903207
    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: Grant
    Filed: May 20, 2022
    Date of Patent: February 13, 2024
    Assignee: Kioxia Corporation
    Inventors: Masaru Kito, Hideaki Aochi, Ryota Katsumata, Akihiro Nitayama, Masaru Kidoh, Hiroyasu Tanaka, Yoshiaki Fukuzumi, Yasuyuki Matsuoka, Mitsuru Sato
  • Patent number: 11903205
    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: Grant
    Filed: May 13, 2022
    Date of Patent: February 13, 2024
    Assignee: Kioxia Corporation
    Inventors: Masaru Kito, Hideaki Aochi, Ryota Katsumata, Akihiro Nitayama, Masaru Kidoh, Hiroyasu Tanaka, Yoshiaki Fukuzumi, Yasuyuki Matsuoka, Mitsuru Sato
  • Publication number: 20240038731
    Abstract: A memory device includes a first memory cell array, a second memory cell array disposed in a first direction with respect to the first memory cell array, a first contact plug extending in the first direction through the first memory cell array, and a second contact plug extending in the first direction through the second memory cell array. The first memory cell array includes first electrode layers stacked in a first direction, and a first semiconductor pillar extending through the first electrode layers in the first direction. The second memory cell array including second electrode layers stacked in the first direction, and a second semiconductor pillar extending in the first direction through the second electrode layers. The first contact plug is electrically connected to the first semiconductor pillar, and the second contact plug is electrically connected to the second semiconductor pillar and the first contact plug.
    Type: Application
    Filed: October 13, 2023
    Publication date: February 1, 2024
    Applicant: KIOXIA CORPORATION
    Inventors: Masayoshi TAGAMI, Ryota KATSUMATA, Jun IIJIMA, Tetsuya SHIMIZU, Takamasa USUI, Genki FUJITA
  • Publication number: 20240008276
    Abstract: A nonvolatile semiconductor memory device, includes: a stacked structural unit including a plurality of insulating films alternately stacked with a plurality of electrode films in a first direction; a selection gate electrode stacked on the stacked structural unit in the first direction; an insulating layer stacked on the selection gate electrode in the first direction; a first semiconductor pillar piercing the stacked structural unit, the selection gate electrode, and the insulating layer in the first direction, a first cross section of the first semiconductor pillar having an annular configuration, the first cross section being cut in a plane orthogonal to the first direction; a first core unit buried in an inner side of the first semiconductor pillar, the first core unit being recessed from an upper face of the insulating layer; and a first conducting layer of the first semiconductor pillar provided on the first core unit to contact the first core unit.
    Type: Application
    Filed: September 12, 2023
    Publication date: January 4, 2024
    Applicant: KIOXIA CORPORATION
    Inventors: Yoshiaki FUKUZUMI, Ryota KATSUMATA, Masaru KITO, Masaru KIDOH, Hiroyasu TANAKA, Yosuke KOMORI, Megumi ISHIDUKI, Junya MATSUNAMI, Tomoko FUJIWARA, Hideaki AOCHI, Ryouhei KIRISAWA, Yoshimasa MIKAJIRI, Shigeto OOTA
  • Patent number: 11844218
    Abstract: A non-volatile semiconductor storage device has a plurality of memory strings to each of which a plurality of electrically rewritable memory cells are connected in series. Each of the memory strings includes first semiconductor layers each having a pair of columnar portions extending in a vertical direction with respect to a substrate and a coupling portion formed to couple the lower ends of the pair of columnar portions; a charge storage layer formed to surround the side surfaces of the columnar portions; and first conductive layers formed to surround the side surfaces of the columnar portions and the charge storage layer. The first conductive layers function as gate electrodes of the memory cells.
    Type: Grant
    Filed: June 17, 2022
    Date of Patent: December 12, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Yoshiaki Fukuzumi, Ryota Katsumata, Masaru Kidoh, Masaru Kito, Hiroyasu Tanaka, Yosuke Komori, Megumi Ishiduki, Hideaki Aochi
  • Patent number: 11817428
    Abstract: A memory device includes a first memory cell array, a second memory cell array disposed in a first direction with respect to the first memory cell array, a first contact plug extending in the first direction through the first memory cell array, and a second contact plug extending in the first direction through the second memory cell array. The first memory cell array includes first electrode layers stacked in a first direction, and a first semiconductor pillar extending through the first electrode layers in the first direction. The second memory cell array including second electrode layers stacked in the first direction, and a second semiconductor pillar extending in the first direction through the second electrode layers. The first contact plug is electrically connected to the first semiconductor pillar, and the second contact plug is electrically connected to the second semiconductor pillar and the first contact plug.
    Type: Grant
    Filed: February 1, 2022
    Date of Patent: November 14, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Masayoshi Tagami, Ryota Katsumata, Jun Iijima, Tetsuya Shimizu, Takamasa Usui, Genki Fujita
  • Publication number: 20230345726
    Abstract: According to one embodiment, a semiconductor memory device includes a first memory chip, a circuit chip, and an external connection electrode on a surface of the first memory chip. The first memory chip comprises first conductors stacked via an insulator, and a first pillar passing the first conductors. The circuit chip comprises a substrate, a control circuit, and a second conductor connected to the control circuit, the circuit chip being attached to the first memory chip. The external connection electrode comprises a portion extending from a side of the surface of the first memory chip through the first memory chip and connected to the second conductor. Part of the first conductors is between the external connection electrode and the substrate.
    Type: Application
    Filed: June 22, 2023
    Publication date: October 26, 2023
    Applicant: KIOXIA CORPORATION
    Inventors: Masayoshi TAGAMI, Jun IIJIMA, Ryota KATSUMATA, Kazuyuki HIGASHI
  • Patent number: 11792992
    Abstract: A nonvolatile semiconductor memory device, includes: a stacked structural unit including a plurality of insulating films alternately stacked with a plurality of electrode films in a first direction; a selection gate electrode stacked on the stacked structural unit in the first direction; an insulating layer stacked on the selection gate electrode in the first direction; a first semiconductor pillar piercing the stacked structural unit, the selection gate electrode, and the insulating layer in the first direction, a first cross section of the first semiconductor pillar having an annular configuration, the first cross section being cut in a plane orthogonal to the first direction; a first core unit buried in an inner side of the first semiconductor pillar, the first core unit being recessed from an upper face of the insulating layer; and a first conducting layer of the first semiconductor pillar provided on the first core unit to contact the first core unit.
    Type: Grant
    Filed: January 14, 2022
    Date of Patent: October 17, 2023
    Assignee: Kioxia Corporation
    Inventors: Yoshiaki Fukuzumi, Ryota Katsumata, Masaru Kito, Masaru Kidoh, Hiroyasu Tanaka, Yosuke Komori, Megumi Ishiduki, Junya Matsunami, Tomoko Fujiwara, Hideaki Aochi, Ryouhei Kirisawa, Yoshimasa Mikajiri, Shigeto Oota
  • Patent number: 11729973
    Abstract: According to one embodiment, a semiconductor memory device includes a first memory chip, a circuit chip, and an external connection electrode on a surface of the first memory chip. The first memory chip comprises first conductors stacked via an insulator, and a first pillar passing the first conductors. The circuit chip comprises a substrate, a control circuit, and a second conductor connected to the control circuit, the circuit chip being attached to the first memory chip. The external connection electrode comprises a portion extending from a side of the surface of the first memory chip through the first memory chip and connected to the second conductor. Part of the first conductors is between the external connection electrode and the substrate.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: August 15, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Masayoshi Tagami, Jun Iijima, Ryota Katsumata, Kazuyuki Higashi
  • Publication number: 20230146470
    Abstract: A non-volatile semiconductor storage device has a plurality of memory strings to each of which a plurality of electrically rewritahle memory cells are connected in series. Each of the memory strings includes first semiconductor layers each having a pair of columnar portions extending in a vertical direction with respect to a substrate and a coupling portion formed to couple the lower ends of the pair of colunmar portions a charge storage layer formed to surround the side surfaces of the columnar portions: and first conductive layers formed to surround the side surfaces of the columnar portions and the charge storage layer. The first conductive layers function as gate electrodes of the memory cells.
    Type: Application
    Filed: December 30, 2022
    Publication date: May 11, 2023
    Applicant: KIOXIA CORPORATION
    Inventors: Yoshiaki FUKUZUMI, Ryota KATSUMATA, Masaru KIDOH, Masaru KITO, Hiroyasu TANAKA, Yosuke KOMORI, Megumi ISHIDUKI, Hideaki AOCHI
  • Publication number: 20230088310
    Abstract: A semiconductor memory includes a memory cell region that includes multiple memory cells stacked above a semiconductor substrate, first and second dummy regions on opposite sides of the memory cell region, each dummy region including multiple dummy cells stacked above the semiconductor substrate, and a wiring that electrically connects dummy cells of the first and second dummy regions that are at a same level above the semiconductor substrate.
    Type: Application
    Filed: November 21, 2022
    Publication date: March 23, 2023
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 11574926
    Abstract: A non-volatile semiconductor storage device has a plurality of memory strings to each of which a plurality of electrically rewritable memory cells are connected in series. Each of the memory strings includes first semiconductor layers each having a pair of columnar portions extending in a vertical direction with respect to a substrate and a coupling portion formed to couple the lower ends of the pair of columnar portions a charge storage layer formed to surround the side surfaces of the columnar portions: and first conductive layers formed to surround the side surfaces of the columnar portions and the charge storage layer. The first conductive layers function as gate electrodes of the memory cells.
    Type: Grant
    Filed: October 12, 2021
    Date of Patent: February 7, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Yoshiaki Fukuzumi, Ryota Katsumata, Masaru Kidoh, Masaru Kito, Hiroyasu Tanaka, Yosuke Komori, Megumi Ishiduki, Hideaki Aochi
  • Patent number: 11552095
    Abstract: A semiconductor memory includes a memory cell region that includes multiple memory cells stacked above a semiconductor substrate, first and second dummy regions on opposite sides of the memory cell region, each dummy region including multiple dummy cells stacked above the semiconductor substrate, and a wiring that electrically connects dummy cells of the first and second dummy regions that are at a same level above the semiconductor substrate.
    Type: Grant
    Filed: March 26, 2021
    Date of Patent: January 10, 2023
    Assignee: KIOXIA CORPORATION
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20220328517
    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: May 20, 2022
    Publication date: October 13, 2022
    Applicant: Kioxia Corporation
    Inventors: Masaru KITO, Hideaki AOCHI, Ryota KATSUMATA, Akihiro NITAYAMA, Masaru KIDOH, Hiroyasu TANAKA, Yoshiaki FUKUZUMI, Yasuyuki MATSUOKA, Mitsuru SATO
  • Publication number: 20220320138
    Abstract: A non-volatile semiconductor storage device has a plurality of memory strings to each of which a plurality of electrically rewritable memory cells are connected in series. Each of the memory strings includes first semiconductor layers each having a pair of columnar portions extending in a vertical direction with respect to a substrate and a coupling portion formed to couple the lower ends of the pair of columnar portions; a charge storage layer formed to surround the side surfaces of the columnar portions; and first conductive layers formed to surround the side surfaces of the columnar portions and the charge storage layer. The first conductive layers function as gate electrodes of the memory cells.
    Type: Application
    Filed: June 17, 2022
    Publication date: October 6, 2022
    Applicant: KIOXIA CORPORATION
    Inventors: Yoshiaki FUKUZUMI, Ryota KATSUMATA, Masaru KIDOH, Masaru KITO, Hiroyasu TANAKA, Yosuke KOMORI, Megumi ISHIDUKI, Hideaki AOCHI
  • Publication number: 20220302166
    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: May 13, 2022
    Publication date: September 22, 2022
    Applicant: Kioxia Corporation
    Inventors: Masaru KITO, Hideaki AOCHI, Ryota KATSUMATA, Akihiro NITAYAMA, Masaru KIDOH, Hiroyasu TANAKA, Yoshiaki FUKUZUMI, Yasuyuki MATSUOKA, Mitsuru SATO
  • Publication number: 20220293621
    Abstract: A semiconductor storage device includes a plurality of conductor layers that are stacked in a first direction and a plurality of bit lines that are spaced from each other in a second direction. Pillars extend in the first direction through the conductor layers and are electrically connected to the bit lines. An insulator is provided that divides the region in which the plurality of pillars are disposed into adjacent regions. An interval between the pillars in an end row adjacent to the insulator is greater than an interval between the pillars in an inner row that is not directly adjacent to the insulator.
    Type: Application
    Filed: August 23, 2021
    Publication date: September 15, 2022
    Inventors: Yusuke OCHI, Ryota KATSUMATA, Masahiro FUKUDA