Patents by Inventor Yasuhito Yoshimizu

Yasuhito Yoshimizu 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: 11450611
    Abstract: In one embodiment, a semiconductor device includes a substrate including two element regions that extend in a first direction parallel to a surface of the substrate and are adjacent to each other in a second direction crossing the first direction. The device further includes an interconnection layer provided above the substrate. The device further includes an insulator provided between the substrate and the interconnection layer. The device further includes a plug extending in the second direction and in a third direction crossing the first and second directions in the insulator, provided on each of the element regions, and electrically connected to the element regions and the interconnection layer.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: September 20, 2022
    Assignee: Kioxia Corporation
    Inventors: Tomoya Sanuki, Keisuke Nakatsuka, Yasuhito Yoshimizu
  • Patent number: 11422712
    Abstract: According to one embodiment, a storage device includes a stage on which a semiconductor wafer can be mounted, wherein data is capable of being read from the semiconductor wafer or data is capable of being written to the semiconductor wafer. The storage device further includes a plurality of probe pins for reading or writing data, and a controller connected the probe pins. The semiconductor wafer includes electrodes connectable to the probe pins, a first memory area that can store user data, and a second memory area that can store identification information for identification of the semiconductor wafer and a check code for checking integrity of the identification information. The controller is capable of reading the identification information and the check code from the second memory area.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: August 23, 2022
    Assignee: Kioxia Corporation
    Inventors: Yasuhito Yoshimizu, Takashi Fukushima, Tatsuro Hitomi, Arata Inoue, Masayuki Miura, Shinichi Kanno, Toshio Fujisawa, Keisuke Nakatsuka, Tomoya Sanuki
  • Publication number: 20220223552
    Abstract: A memory chip unit includes a pad electrode including first and second portions, and a memory cell array. A prober includes a probe card and a movement mechanism. The probe card includes a probe electrode to be in contact with the pad electrode, and a memory controller electrically coupled to the probe electrode and executes reading and writing on the memory cell array. The movement mechanism executes a first operation that brings the probe electrode into contact with the first portion and does not bring the probe electrode into contact with the second portion, and a second operation that does not bring the probe electrode into contact with the first portion and brings the probe electrode into contact with the second portion.
    Type: Application
    Filed: March 15, 2022
    Publication date: July 14, 2022
    Inventors: Yasuhito YOSHIMIZU, Takashi FUKUSHIMA, Tatsuro HITOMI, Arata INOUE, Masayuki MIURA, Shinichi KANNO, Toshio FUJISAWA, Keisuke NAKATSUKA, Tomoya SANUKI
  • Publication number: 20220204270
    Abstract: According to one embodiment, a storage device includes a control apparatus and a stocker. The control apparatus writes data to or reads data from a storage medium that includes a plurality of non-volatile memory chips. The stocker stores a plurality of the storage media that are detached from the control apparatus. The control apparatus includes a first temperature control system. The first temperature control system raises temperature of the storage medium to a first temperature or higher. The stocker includes a second temperature control system. The second temperature control system cools the storage medium to a second temperature or lower. The second temperature is lower than the first temperature.
    Type: Application
    Filed: March 14, 2022
    Publication date: June 30, 2022
    Inventors: Yasuhito YOSHIMIZU, Takashi FUKUSHIMA, Tatsuro HITOMI, Arata INOUE, Masayuki MIURA, Shinichi KANNO, Toshio FUJISAWA, Keisuke NAKATSUKA, Tomoya SANUKI
  • Patent number: 11342182
    Abstract: According to an embodiment, the substrate treatment device includes a dilutor configured to dilute a first liquid containing a metal ion and exhibiting acidity. The device further includes a pH changer configured to change a pH of the first liquid before or after being diluted by the dilutor. The device further includes a substrate conditioner configured to treat the substrate using the first liquid, which is diluted by the dilutor and with the pH changed by the pH changer.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: May 24, 2022
    Assignee: KIOXIA CORPORATION
    Inventors: Yasuhito Yoshimizu, Fuyuma Ito, Hakuba Kitagawa, Yohei Yamamoto, Hisashi Okuchi, Yuji Yamada
  • Publication number: 20220130754
    Abstract: A semiconductor memory device including: plural first conductive layers stacked on a substrate; plural second conductive layers each stacked between the first conductive layers; a pillar that extends in a stacking direction of the first and second conductive layers and forms plural memory cells at intersections of the first and second conductive layers in a region where first and second conductive layers are arranged; a first contact plug that extends in the stacking direction of the first and second conductive layers and is connected to the first conductive layers in the region where the first and second conductive layers are arranged; and a second contact plug that extends in the stacking direction of the first and second conductive layers and is connected to the second conductive layers in the region where the first conductive layers and second conductive layers are arranged.
    Type: Application
    Filed: March 19, 2019
    Publication date: April 28, 2022
    Applicant: Kioxia Corporation
    Inventors: Keisuke NAKATSUKA, Yasuhito YOSHIMIZU, Tomoya SANUKI, Fumitaka ARAI
  • Publication number: 20220091772
    Abstract: According to one embodiment, a memory system includes a non-volatile semiconductor memory with a plurality of blocks. A controller in the system controls the writing of data to the non-volatile semiconductor memory and includes a host I/F control interface to receive write command information including file allocation information indicating a location for write data, a file information management unit to assign an erasure level to a file and output a file identifier in which a file name, a file size, and the erasure level of the file are combined, and a flash translation layer unit to allocate each file on a single file per block basis based on the write command information and the file identifier.
    Type: Application
    Filed: August 24, 2021
    Publication date: March 24, 2022
    Inventors: Toshio FUJISAWA, Tomoya SANUKI, Hitomi TANAKA, Takeshi ISHIHARA, Yasuhito YOSHIMIZU
  • Publication number: 20220085036
    Abstract: A semiconductor storage device includes first wiring layers stacked along a first direction, a first pillar including a first semiconductor layer and extending along the first direction through the first wiring layers, a second wiring layer disposed above the first pillar in the first direction and extending along a second direction perpendicular to the first direction, a semiconductor-containing layer including a first portion disposed on an upper end of the first pillar in the first direction, a second portion contacting the first portion and formed along the second wiring layer, and a third portion contacting an upper end of the second portion and extending along a third direction perpendicular to the first direction and crossing the second direction, and a first insulating layer between each of the first and second portions of the semiconductor-containing layer and the second wiring layer. An upper surface of the third portion contains a metal.
    Type: Application
    Filed: March 2, 2021
    Publication date: March 17, 2022
    Inventors: Yasuhito YOSHIMIZU, Hiroshi NAKAKI, Kazuaki NAKAJIMA
  • Publication number: 20220068961
    Abstract: A semiconductor storage device includes first and second stacks, and first to fourth semiconductor layers. The first stack includes first conductive layers and first insulating layers alternately stacked in a first direction. The first semiconductor layer extends through the first stack. The second semiconductor layer extends in a second direction above the first stack and connected to the first semiconductor layer. The second stack includes second conductive layers and second insulating layers alternately stacked in the first direction. The first and second stacks are arranged in a third direction. The third semiconductor layer extends through the second stack. The fourth semiconductor layer extends in the second direction above the second stack and connected to the third semiconductor layer. A third conductive layer is in contact with upper surfaces of the second and fourth semiconductor layers. The second and fourth semiconductor layers are separated from each other in the third direction.
    Type: Application
    Filed: March 1, 2021
    Publication date: March 3, 2022
    Inventors: Yasuhito YOSHIMIZU, Hiroshi NAKAKI
  • Patent number: 11264403
    Abstract: According to one embodiment, a semiconductor memory device includes: first and second interconnect layers; a plurality of third interconnect layers stacked between the first and second interconnect layers; a first insulating layer passing through the plurality of third interconnect layers, and including one end that is in contact with a first face of the first interconnect layer; a first memory pillar including a first semiconductor layer passing through the plurality of third interconnect layers and a charge storage layer provided between the plurality of third interconnect layers and the first semiconductor layer. A distance between a third face of the first interconnect layer opposite to the first face and the second interconnect layer in the first direction, differs at a position corresponding to the first insulating layer from at positions corresponding to the third interconnect layers.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: March 1, 2022
    Assignee: Kioxia Corporation
    Inventor: Yasuhito Yoshimizu
  • Publication number: 20220013367
    Abstract: A plasma treatment apparatus includes a discharge device generating plasma under atmospheric pressure, and a nonmetallic tube capable of advancing the plasma generated in the discharge device. The discharge device includes a discharge body with an internal space, and the plasma being generated in the internal space. The nonmetallic tube is connected to the discharge body, and includes a material different from a material of the discharge body. The plasma is released from the nonmetallic tube to an environment under atmospheric pressure.
    Type: Application
    Filed: September 23, 2021
    Publication date: January 13, 2022
    Applicant: Toshiba Memory Corporation
    Inventors: Yasuhito YOSHIMIZU, Hiroyuki YASUI, Yuya AKEBOSHI, Fuyuma ITO
  • Publication number: 20210407867
    Abstract: A semiconductor wafer includes a surface having at least one recess including an inner wall surface. The inner wall surface is exposed.
    Type: Application
    Filed: September 7, 2021
    Publication date: December 30, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, Kioxia Corporation
    Inventors: Fuyuma ITO, Yasuhito YOSHIMIZU, Nobuhito KUGE, Yui KAGI, Susumu OBATA, Keiichiro MATSUO, Mitsuo SANO
  • Patent number: 11211267
    Abstract: According to one embodiment, a substrate processing apparatus includes a table configured to place a substrate thereon and to connect the substrate to a positive electrode, an counter electrode located opposite to the table, having a plurality of holes, and connected to a negative electrode, and a holding unit located opposite to the table across the counter electrode and configured to supply a chemical liquid to the counter electrode while holding the counter electrode.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: December 28, 2021
    Assignee: Toshiba Memory Corporation
    Inventors: Yasuhito Yoshimizu, Hakuba Kitagawa, Takaumi Morita
  • Patent number: 11195849
    Abstract: In one embodiment, a semiconductor device includes a first film including a plurality of electrode layers and a plurality of insulating layers provided alternately in a first direction, and a first semiconductor layer provided in the first film via a charge storage layer and extending in the first direction. The device further includes a first conductive member provided in the first film and extending in the first direction, and a second semiconductor layer provided on the first film to contact the first semiconductor layer. The second semiconductor layer includes a first surface on a side of the first film, and a second surface on an opposite side of the first surface. The second surface is an uneven face protruding towards the first direction.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: December 7, 2021
    Assignee: Toshiba Memory Corporation
    Inventors: Yasuhito Yoshimizu, Yuji Setta, Masaru Kito
  • Patent number: 11171022
    Abstract: In one embodiment, a substrate treatment apparatus includes a supporter configured to support and rotate a substrate, and a liquid supplier configured to supply a liquid to the substrate. The apparatus further includes a wall provided separately from the supporter and at least partially surrounding the supporter, and a detector provided between the supporter and the wall and configured to detect a change in the liquid.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: November 9, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Hakuba Kitagawa, Yasuhito Yoshimizu, Fuyuma Ito, Hiroyuki Tanizaki
  • Patent number: 11152334
    Abstract: In one embodiment, a semiconductor device includes a first chip that includes a first interconnect layer, a first insulator provided on the first interconnect layer, a first metal portion provided on the first interconnect layer and provided in the first insulator and including at least one of palladium, platinum and gold, and a second interconnect layer provided on the first metal portion and provided in the first insulator. The device further includes a second chip that includes a second insulator provided on the first insulator, and a third interconnect layer provided in the second insulator and provided on the second interconnect layer.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: October 19, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Yusuke Tanaka, Atsushi Hieno, Tsutomu Nakanishi, Yasuhito Yoshimizu, Masayoshi Tagami
  • Patent number: 11145670
    Abstract: A semiconductor storage device according to an embodiment comprises a substrate. A stack body having first conductive layers and first insulating layers alternately stacked in a first direction is provided on the substrate. A pillar part extends in the first direction in the stack body and has a memory film. An insulating member extends in the first direction at a position different from that of the pillar part in the stack body. A phosphorus-containing insulator is provided below the stack body and the insulating member.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: October 12, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Yasuhito Yoshimizu, Tomohiko Sugita
  • Publication number: 20210296349
    Abstract: A semiconductor storage device includes a substrate with a memory cell region and a first region to one side of the memory cell region. A first memory cell layer is on the substrate. A second memory cell layer is between the first memory cell layer and the substrate. A plurality of first conductive layers are stacked on each other in the first memory cell layer. A plurality of second conductive layers are stacked on each other in the second memory cell layer. A plurality of first contacts are above the first region of the substrate, extending through second conductive layer from the substrate to the first memory cell layer. The contacts are electrically insulated from the second conductive layers and electrically connected to ends of the first conductive layers in the first region.
    Type: Application
    Filed: February 10, 2021
    Publication date: September 23, 2021
    Inventor: Yasuhito YOSHIMIZU
  • Publication number: 20210296239
    Abstract: A semiconductor storage device includes a semiconductor substrate and a conductive layer separated from the semiconductor substrate in a first direction. The conductive layer extends in a second direction parallel to the semiconductor substrate. A semiconductor layer extends in the first direction through the conductive layer. A first contact extends in the first direction and is connected to a surface of the conductive layer facing away from the semiconductor substrate. A first insulating layer extends in the first direction, and a second insulating layer extends along the first insulating layer in the first direction. Each of the first and second insulating layers entirely overlaps with the first contact when viewed in the first direction.
    Type: Application
    Filed: February 10, 2021
    Publication date: September 23, 2021
    Inventor: Yasuhito YOSHIMIZU
  • Publication number: 20210273055
    Abstract: A semiconductor storage device according to the present embodiment includes a first semiconductor layer containing impurities. A stacked body is provided above the first semiconductor layer and includes insulating layers and conductive layers that are alternately stacked. A semiconductor body penetrates through the stacked body in a stacking direction to reach the first semiconductor layer and includes a lower region on a side of the first semiconductor layer and an upper region positioned above the lower region. A charge accumulation part is provided between the semiconductor bodies and the conductive layers. An impurity concentration of the lower region of the semiconductor body is higher than that of the first semiconductor layer.
    Type: Application
    Filed: September 14, 2020
    Publication date: September 2, 2021
    Inventors: Naomi YANAI, Yasuhito YOSHIMIZU, Takashi ISHIDA