Patents by Inventor Gaku Sudo

Gaku Sudo 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: 11856791
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: December 26, 2023
    Assignee: Kioxia Corporation
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Gaku Sudo, Tadashi Kai
  • Publication number: 20220278168
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Application
    Filed: May 20, 2022
    Publication date: September 1, 2022
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI, Gaku SUDO, Tadashi KAI
  • Patent number: 11367748
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: June 21, 2022
    Assignee: KIOXIA CORPORATION
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Gaku Sudo, Tadashi Kai
  • Publication number: 20210210549
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI, Gaku SUDO, Tadashi KAI
  • Patent number: 10985209
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: April 20, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Masahiko Nakayama, Kazumasa Sunouchi, Gaku Sudo, Tadashi Kai
  • Publication number: 20200303453
    Abstract: A nonvolatile storage device includes first interconnections extending in a first direction and second interconnections extending in a second direction intersecting the first direction. Memory cells are formed at intersections between first and second interconnections. Each memory cell includes a resistance change element and a selector. In the arrangement of memory cells, all memory cells that are connected to any particular first interconnection are aligned along that first interconnection, and all memory cells connected to any particular second interconnection are alternately staggered in the first direction across a width of that second interconnection.
    Type: Application
    Filed: September 3, 2019
    Publication date: September 24, 2020
    Inventors: Masahiko NAKAYAMA, Kazumasa SUNOUCHI, Gaku SUDO, Tadashi KAI
  • Patent number: 10283647
    Abstract: According to one embodiment, a semiconductor device includes an interconnection layer, a stacked body, a plurality of separation portions, a semiconductor body, a charge storage portion, an n-type semiconductor region, and a p-type semiconductor region. The n-type semiconductor region is provided between the separation portion and the first interconnection part, and has contact with the first interconnection part and the second semiconductor part. The p-type semiconductor region is provided between the separation portion and the second interconnection part, and has contact with the second interconnection part and the second semiconductor part.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: May 7, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Koji Matsuo, Gaku Sudo, Jun Nogami, Tatsuro Shinozaki, Takashi Ishida, Jun Fujiki, Kenzo Manabe
  • Patent number: 10090320
    Abstract: A semiconductor device according to an embodiment, includes a stacked body, a plurality of first terraces, a second terrace, a plurality of interconnects, a plurality of conductive bodies. The stacked body includes a plurality of electrode layers. The stacked body includes a stairstep portion at an end portion of the stacked body. The plurality of first terraces are provided in the stairstep portion. The second terrace is provided in the stairstep portion. The plurality of interconnects are provided from the second terrace to the plurality of first terraces. The plurality of interconnects contact one of the plurality of electrode layers at the stairstep portion. The plurality of conductive bodies are provided above the second terrace. The plurality of conductive bodies extend in a stacking direction of the stacked body. The conductive bodies contact the interconnects above the second terrace.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: October 2, 2018
    Assignee: Toshiba Memory Corporation
    Inventors: Jun Nogami, Gaku Sudo
  • Patent number: 9997526
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device is disclosed. The method includes forming a stacked body alternately stacked with a plurality of members and a plurality of intermediate bodies having materials different from materials of the plurality of members, processing an end portion of at least two layers of the plurality of members sequentially in a stacking direction of the stacked body, and forming a step-wise step stacked with the plurality of members and the plurality of intermediate bodies, forming a plurality of side wall films contacting the step and making the end portion of the plurality of members in a step-wise. The making the end portion of the plurality of members in a step-wise includes retreating a portion of the plurality of members, the portion separated from the plurality of side wall films and exposed from the stacked body.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: June 12, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Gaku Sudo, Masanobu Baba, Megumi Ishiduki, Tadashi Iguchi, Murato Kawai
  • Patent number: 9947681
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device is disclosed. The method includes forming a stacked body alternately stacked with a plurality of members and a plurality of intermediate bodies having materials different from materials of the plurality of members, processing an end portion of at least two layers of the plurality of members sequentially in a stacking direction of the stacked body, and forming a step-wise step stacked with the plurality of members and the plurality of intermediate bodies, forming a plurality of side wall films contacting the step and making the end portion of the plurality of members in a step-wise. The making the end portion of the plurality of members in a step-wise includes retreating a portion of the plurality of members, the portion separated from the plurality of side wall films and exposed from the stacked body.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: April 17, 2018
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Gaku Sudo, Masanobu Baba, Megumi Ishiduki, Tadashi Iguchi, Murato Kawai
  • Publication number: 20180040742
    Abstract: According to one embodiment, a semiconductor device includes an interconnection layer, a stacked body, a plurality of separation portions, a semiconductor body, a charge storage portion, an n-type semiconductor region, and a p-type semiconductor region. The n-type semiconductor region is provided between the separation portion and the first interconnection part, and has contact with the first interconnection part and the second semiconductor part. The p-type semiconductor region is provided between the separation portion and the second interconnection part, and has contact with the second interconnection part and the second semiconductor part.
    Type: Application
    Filed: August 4, 2017
    Publication date: February 8, 2018
    Applicant: Toshiba Memory Corporation
    Inventors: Koji Matsuo, Gaku Sudo, Jun Nogami, Tatsuro Shinozaki, Takashi Ishida, Jun Fujiki, Kenzo Manabe
  • Patent number: 9831270
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes first and second connectors, first and second conductive layers, a first insulating region, and a memory portion. The first connector extends in a first direction. The first conductive layer is electrically connected to the first connector, and includes a first planar region, a first overlap region, a first side surface region, and a first crossing side surface region. The second connector extends in the first direction. The second conductive layer is electrically connected to the second connector, and includes a second planar region, a second overlap region, a second side surface region, and a second crossing side surface region. The first insulating region is provided between the first and second conductive layers. The memory portion is connected to the first and second planar regions.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 28, 2017
    Assignee: Toshiba Memory Corporation
    Inventors: Gaku Sudo, Yumiko Miyano
  • Publication number: 20170338240
    Abstract: A semiconductor device according to an embodiment, includes a stacked body, a plurality of first terraces, a second terrace, a plurality of interconnects, a plurality of conductive bodies. The stacked body includes a plurality of electrode layers. The stacked body includes a stairstep portion at an end portion of the stacked body. The plurality of first terraces are provided in the stairstep portion. The second terrace is provided in the stairstep portion. The plurality of interconnects are provided from the second terrace to the plurality of first terraces. The plurality of interconnects contact one of the plurality of electrode layers at the stairstep portion. The plurality of conductive bodies are provided above the second terrace. The plurality of conductive bodies extend in a stacking direction of the stacked body. The conductive bodies contact the interconnects above the second terrace.
    Type: Application
    Filed: September 16, 2016
    Publication date: November 23, 2017
    Inventors: Jun NOGAMI, Gaku Sudo
  • Publication number: 20170271366
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes first and second connectors, first and second conductive layers, a first insulating region, and a memory portion. The first connector extends in a first direction. The first conductive layer is electrically connected to the first connector, and includes a first planar region, a first overlap region, a first side surface region, and a first crossing side surface region. The second connector extends in the first direction. The second conductive layer is electrically connected to the second connector, and includes a second planar region, a second overlap region, a second side surface region, and a second crossing side surface region. The first insulating region is provided between the first and second conductive layers. The memory portion is connected to the first and second planar regions.
    Type: Application
    Filed: March 16, 2017
    Publication date: September 21, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Gaku SUDO, Yumiko MIYANO
  • Publication number: 20170213840
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device is disclosed. The method includes forming a stacked body alternately stacked with a plurality of members and a plurality of intermediate bodies having materials different from materials of the plurality of members, processing an end portion of at least two layers of the plurality of members sequentially in a stacking direction of the stacked body, and forming a step-wise step stacked with the plurality of members and the plurality of intermediate bodies, forming a plurality of side wall films contacting the step and making the end portion of the plurality of members in a step-wise. The making the end portion of the plurality of members in a step-wise includes retreating a portion of the plurality of members, the portion separated from the plurality of side wall films and exposed from the stacked body.
    Type: Application
    Filed: September 7, 2016
    Publication date: July 27, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Gaku Sudo, Masanobu Baba, Megumi Ishiduki, Tadashi Iguchi, Murato Kawai
  • Patent number: 9384829
    Abstract: A memory device includes n (n being an integer of 2 or more) resistance change films being series connected to each other. Each of the resistance change films is a superlattice film in which plural pairs of a first crystal layer made of a first compound and a second crystal layer made of a second compound are alternately stacked. An average composition of the entire resistance change film or an arrangement pitch of the first crystal layers and the second crystal layers are mutually different among the n resistance change films.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: July 5, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hironobu Furuhashi, Iwao Kunishima, Susumu Shuto, Yoshiaki Asao, Gaku Sudo
  • Patent number: 9178064
    Abstract: According to one embodiment, a method for manufacturing a semiconductor device, includes preparing a structure body. In the structure body, a fin extending in a first direction is formed on an upper surface of a semiconductor substrate, a lower-side mask member is provided on the fin, and an upper-side mask member that is wider than the fin and the lower-side mask member is provided on the lower-side mask member. The method includes implanting an impurity into the semiconductor substrate with the upper-side mask member and the lower-side mask member as a mask, removing the upper-side mask member, forming a gate insulator film on a side surface of the fin, forming a conductive film that covers the fin and the lower-side mask member, forming a mask for gate having a pattern extending in a second direction, and removing selectively the conductive film to form a gate electrode.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: November 3, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Gaku Sudo
  • Patent number: 9142537
    Abstract: An integrated circuit device includes a plurality of fins on an upper surface of a semiconductor substrate and extending in a first direction, a device isolation insulating film placed between the fins, a gate electrode extending in a second direction crossing the first direction on the insulating film; and an insulating film insulating the fin from the gate electrode. In a first region where a plurality of the fins are consecutively arranged, an upper surface of the device isolation insulating film is located at a first position below an upper end of the fin. In a second region located in the second direction as viewed from the first region, the upper surface of the device isolation insulating film is located at a second position above the upper end of the fin. In the second region, the device isolation insulating film covers entirely a side surface of the fin.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: September 22, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventor: Gaku Sudo
  • Patent number: 9117888
    Abstract: According to one embodiment, an integrated circuit device includes a plurality of interconnects and a contact via. The plurality of interconnects are arranged parallel to each other. The contact via is connected to each of the interconnects. A protrusion is formed at a portion of the each of the interconnects connected to the contact via to protrude in a direction of the arrangement. A recess is formed at a portion of the each of the interconnects separated from the portion having the protrusion to recede in the direction of the arrangement. The protrusion formed on one interconnect of two mutually-adjacent interconnects among the plurality of interconnects is opposed to the recess formed in one other interconnect of the two mutually-adjacent interconnects. In the each of the interconnects, the portion having the recess is separated from portions on two sides of the portion having the recess and is separated also from the portion having the protrusion.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: August 25, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Gaku Sudo
  • Publication number: 20140374829
    Abstract: An integrated circuit device includes a plurality of fins on an upper surface of a semiconductor substrate and extending in a first direction, a device isolation insulating film placed between the fins, a gate electrode extending in a second direction crossing the first direction on the insulating film; and an insulating film insulating the fin from the gate electrode. In a first region where a plurality of the fins are consecutively arranged, an upper surface of the device isolation insulating film is located at a first position below an upper end of the fin. In a second region located in the second direction as viewed from the first region, the upper surface of the device isolation insulating film is located at a second position above the upper end of the fin. In the second region, the device isolation insulating film covers entirely a side surface of the fin.
    Type: Application
    Filed: September 11, 2014
    Publication date: December 25, 2014
    Applicant: Kabushiki Kaisha Toshiba
    Inventor: Gaku SUDO