Patents by Inventor Masao Iwase

Masao Iwase 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: 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: 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: 20210217755
    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: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 10971511
    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 11, 2020
    Date of Patent: April 6, 2021
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20200212053
    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: March 11, 2020
    Publication date: July 2, 2020
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 10622372
    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: January 30, 2019
    Date of Patent: April 14, 2020
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20190164979
    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: January 30, 2019
    Publication date: May 30, 2019
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 10199387
    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: August 17, 2018
    Date of Patent: February 5, 2019
    Assignee: Toshiba Memory Corporation
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20180358368
    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: August 17, 2018
    Publication date: December 13, 2018
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 10056403
    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: September 18, 2017
    Date of Patent: August 21, 2018
    Assignee: Toshiba Memory Corporation
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20180006042
    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: September 18, 2017
    Publication date: January 4, 2018
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 9768188
    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 11, 2016
    Date of Patent: September 19, 2017
    Assignee: TOSHIBA MEMORY CORPORATION
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20170062441
    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 11, 2016
    Publication date: March 2, 2017
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 9502299
    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: September 2, 2014
    Date of Patent: November 22, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoo Hishida, Sadatoshi Murakami, Ryota Katsumata, Masao Iwase
  • Publication number: 20160079266
    Abstract: According to one embodiment, a semiconductor memory device includes a stacked body, a selection gate electrode, a semiconductor pillar, a first insulating member, a second insulating member, a third insulating member. The stacked body is provided on the substrate. The selection gate electrode is provided on the stacked body. The first insulating member divides the stacked body in a first direction. The second insulating member is provided in an area directly above the first insulating member and dividing the selection gate electrode in the first direction. The third insulating member is provided in a region other than the area directly above the first insulating member and dividing the selection gate electrode in the first direction. An average width of the second insulating member in the first direction is larger than an average width of the third insulating member in the first direction.
    Type: Application
    Filed: March 13, 2015
    Publication date: March 17, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Nozomi KIDO, Masao IWASE, Tadashi IGUCHI
  • Publication number: 20150263024
    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: September 2, 2014
    Publication date: September 17, 2015
    Inventors: Tomoo HISHIDA, Sadatoshi MURAKAMI, Ryota KATSUMATA, Masao IWASE
  • Patent number: 8786003
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a substrate; a memory unit provided on the substrate; and a non-memory unit provided on the substrate. The memory unit includes: a first stacked body including a plurality of first electrode films and a first inter-electrode insulating film, the plurality of first electrode films being stacked along a first axis perpendicular to the major surface, the first inter-electrode insulating film being provided between two of the first electrode films mutually adjacent along the first axis; a first semiconductor layer opposing side surfaces of the first electrode films; a first memory film provided between the first semiconductor layer and the first electrode films; and a first conductive film provided on the first stacked body apart from the first stacked body. The non-memory unit includes a resistance element unit of the same layer as the conductive film.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Hiroyasu Tanaka
  • Patent number: 8735246
    Abstract: According to one embodiment, a method is disclosed for manufacturing nonvolatile semiconductor memory device including forming a stacked body by alternately stacking an electrode layer and a layer-to-be-etched, and forming an oxidized layer between the layer-to-be-etched provided at least in any side of an upper side and a lower side of the electrode layer and the electrode layer. The method can include forming a groove which passes through the stacked body. The method can include embedding an insulating body within the groove. The method can include forming a hole which passes through the stacked body. The method can include selectively removing the layer-to-be-etched via the hole. The method can include forming a charge storage layer in an inner side of the hole. The method can include forming a channel body layer in an inner side of the charge storage layer.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: May 27, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shuichi Kuboi, Tadashi Iguchi, Masao Iwase, Toru Matsuda
  • Publication number: 20130228841
    Abstract: According to one embodiment, a method is disclosed for manufacturing nonvolatile semiconductor memory device including forming a stacked body by alternately stacking an electrode layer and a layer-to-be-etched, and forming an oxidized layer between the layer-to-be-etched provided at least in any side of an upper side and a lower side of the electrode layer and the electrode layer. The method can include forming a groove which passes through the stacked body. The method can include embedding an insulating body within the groove. The method can include forming a hole which passes through the stacked body. The method can include selectively removing the layer-to-be-etched via the hole. The method can include forming a charge storage layer in an inner side of the hole. The method can include forming a channel body layer in an inner side of the charge storage layer.
    Type: Application
    Filed: August 31, 2012
    Publication date: September 5, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shuichi KUBOI, Tadashi Iguchi, Masao Iwase, Toru Matsuda
  • Publication number: 20130056816
    Abstract: According to one embodiment, a nonvolatile semiconductor memory device includes: a substrate; a memory unit provided on the substrate; and a non-memory unit provided on the substrate. The memory unit includes: a first stacked body including a plurality of first electrode films and a first inter-electrode insulating film, the plurality of first electrode films being stacked along a first axis perpendicular to the major surface, the first inter-electrode insulating film being provided between two of the first electrode films mutually adjacent along the first axis; a first semiconductor layer opposing side surfaces of the first electrode films; a first memory film provided between the first semiconductor layer and the first electrode films; and a first conductive film provided on the first stacked body apart from the first stacked body. The non-memory unit includes a resistance element unit of the same layer as the conductive film.
    Type: Application
    Filed: March 15, 2012
    Publication date: March 7, 2013
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Masao Iwase, Hiroyasu Tanaka