Patents by Inventor Hisashi Shima

Hisashi Shima 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: 20240127982
    Abstract: An information processing apparatus includes a converting portion having a plurality of electrical conductors to be arranged in mutual separation and a medium arranged so as to mutually connect the plurality of electrical conductors, wherein the converting portion is the information processing apparatus to convert an input signal to an output signal. The medium includes the electrolyte and is configured to be capable of controlling an electrical conductivity of an electrically conductive path mutually electrically connecting the plurality of electrical conductors, and the medium is selected such that the electrical conductivity of the electrically conductive path changes over time with the input signal not being present.
    Type: Application
    Filed: January 27, 2022
    Publication date: April 18, 2024
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOKYO UNIVERSITY OF SCIENCE FOUNDATION, TOYOTA PHYSICAL AND CHEMICAL RESEARCH INSTITUTE, NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NAGASE & CO., LTD.
    Inventors: Hiroyuki AKINAGA, Hisashi SHIMA, Yasuhisa NAITOH, Hiroshi SATOU, Dan SATOU, Takuma MATSUO, Kentaro KINOSHITA, Toshiyuki ITOH, Toshiki NOKAMI, Masakazu KOBAYASHI
  • Patent number: 11933752
    Abstract: A gas sensor includes: a gas-sensitive body layer disposed above a substrate and including a metal oxide layer; a first electrode on the gas-sensitive body layer; and a second electrode on the gas-sensitive body layer, being apart from the first electrode by a gap. The gas-sensitive body layer has a resistance change characteristic that reversibly transitions to a high-resistance state and a low-resistance state on basis of a voltage applied across the first electrode and the second electrode. At least a part of the gas-sensitive body layer is exposed to the gap. The gas-sensitive body layer has a resistance that decreases when gas containing a hydrogen atom is in contact with the second electrode.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: March 19, 2024
    Assignee: NUVOTON TECHNOLOGY CORPORATION JAPAN
    Inventors: Satoru Fujii, Zhiqiang Wei, Kazunari Homma, Shinichi Yoneda, Yasuhisa Naito, Hisashi Shima, Hiroyuki Akinaga
  • Patent number: 11889776
    Abstract: A variable resistance non-volatile memory element includes first and second electrodes and a variable resistance layer between the electrodes. The layer has a resistance value reversibly variable based on an electrical signal. The layer includes a first variable resistance layer that includes an oxygen deficient first metal oxide containing a first metal element and oxygen, and a second variable resistance layer that includes a composite oxide containing the first metal element, a second metal element different from the first metal element, and oxygen, and having a different degree of oxygen deficiency from the first metal oxide. The composite oxide has a lower degree of oxygen deficiency than the first metal oxide. At room temperature, the composite oxide has a smaller oxygen diffusion coefficient than a second metal oxide containing the first metal element and oxygen, and having the degree of oxygen deficiency equal to that of the composite oxide.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: January 30, 2024
    Assignee: Nuvoton Technology Corporation Japan
    Inventors: Ryutaro Yasuhara, Satoru Fujii, Takumi Mikawa, Atsushi Himeno, Kengo Nishio, Takehide Miyazaki, Hiroyuki Akinaga, Yasuhisa Naitoh, Hisashi Shima
  • Publication number: 20220407003
    Abstract: An information processing device, including a resistive analog neuromorphic device element having a pair of electrodes and an oxide layer provided between the pair of electrodes, and a parallel circuit having a low resistance component and a capacitance component. The parallel circuit and the resistive analog neuromorphic device element are connected in series.
    Type: Application
    Filed: August 26, 2022
    Publication date: December 22, 2022
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Hisashi SHIMA, Yasuhisa NAITOH, Hiroyuki AKINAGA, Makoto TAKAHASHI
  • Patent number: 11457303
    Abstract: A device can include a processor; memory accessible to the processor; a housing assembly that includes a display and a tray recess; and an ear bud tray disposed in the tray recess.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: September 27, 2022
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Samuel Jackson Patterson, Cuong Huy Truong, Kazuo Nakada, Hisashi Shima
  • Publication number: 20220254998
    Abstract: A conductive bridge memory device includes a memory cell including a first metal layer; a second metal layer; a first insulator layer having a first surface facing the first metal layer and a second surface facing the second metal layer and being a surface opposite to the first surface, and having a through hole penetrating between the first surface and the second surface; and a liquid layer being formed of liquid containing a liquid electrolyte impregnated in the through hole.
    Type: Application
    Filed: August 28, 2020
    Publication date: August 11, 2022
    Applicants: NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, NAGASE & CO., LTD.
    Inventors: Toshiyuki ITOH, Toshiki NOKAMI, Kentaro KINOSHITA, Hisashi SHIMA, Yasuhisa NAITOH, Hiroyuki AKINAGA, Hiroshi SATOU, Shigeki MORII, Kusuo OTA, Atsushi TANAKA
  • Publication number: 20220167074
    Abstract: A device can include a processor; memory accessible to the processor; a housing assembly that includes a display and a tray recess; and an ear bud tray disposed in the tray recess.
    Type: Application
    Filed: November 20, 2020
    Publication date: May 26, 2022
    Inventors: Samuel Jackson Patterson, Cuong Huy Truong, Kazuo Nakada, Hisashi Shima
  • Publication number: 20210320248
    Abstract: A variable resistance non-volatile memory element includes first and second electrodes and a variable resistance layer between the electrodes. The layer has a resistance value reversibly variable based on an electrical signal. The layer includes a first variable resistance layer that includes an oxygen deficient first metal oxide containing a first metal element and oxygen, and a second variable resistance layer that includes a composite oxide containing the first metal element, a second metal element different from the first metal element, and oxygen, and having a different degree of oxygen deficiency from the first metal oxide. The composite oxide has a lower degree of oxygen deficiency than the first metal oxide. At room temperature, the composite oxide has a smaller oxygen diffusion coefficient than a second metal oxide containing the first metal element and oxygen, and having the degree of oxygen deficiency equal to that of the composite oxide.
    Type: Application
    Filed: June 23, 2021
    Publication date: October 14, 2021
    Inventors: Ryutaro YASUHARA, Satoru FUJII, Takumi MIKAWA, Atsushi HIMENO, Kengo NISHIO, Takehide MIYAZAKI, Hiroyuki AKINAGA, Yasuhisa NAITOH, Hisashi SHIMA
  • Publication number: 20190346391
    Abstract: A gas sensor includes: a gas-sensitive body layer disposed above a substrate and including a metal oxide layer; a first electrode on the gas-sensitive body layer; and a second electrode on the gas-sensitive body layer, being apart from the first electrode by a gap. The gas-sensitive body layer has a resistance change characteristic that reversibly transitions to a high-resistance state and a low-resistance state on basis of a voltage applied across the first electrode and the second electrode. At least a part of the gas-sensitive body layer is exposed to the gap. The gas-sensitive body layer has a resistance that decreases when gas containing a hydrogen atom is in contact with the second electrode.
    Type: Application
    Filed: July 23, 2019
    Publication date: November 14, 2019
    Inventors: Satoru Fujii, Zhiqiang Wei, Kazunari Homma, Shinichi Yoneda, Yasuhisa Naito, Hisashi Shima, Hiroyuki Akinaga
  • Patent number: 9025327
    Abstract: Some embodiments of the present invention include a portable tablet folio stand that is designed for use in multiple modes. The stand can allow a user to view the tablet from multiple angles, such as a movie viewing angle and a working angle. In the movie viewing angle, the tablet is optimally positioned for viewing the tablet screen, for instance to watch videos. In the working angle, the tablet is optimally positioned for performing tasks such as typing on the tablet. In some embodiments, the tablet stand can be configured to be portable and detachably coupled to a keyboard.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 5, 2015
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Hiroyuki Noguchi, Eiji Shinohara, Hideaki Hasegawa, Hisashi Shima, Tomoyuki Takahashi, Aaron Michael Stewart
  • Publication number: 20140002977
    Abstract: Some embodiments of the present invention include a portable tablet folio stand that is designed for use in multiple modes. The stand can allow a user to view the tablet from multiple angles, such as a movie viewing angle and a working angle. In the movie viewing angle, the tablet is optimally positioned for viewing the tablet screen, for instance to watch videos. In the working angle, the tablet is optimally positioned for performing tasks such as typing on the tablet. In some embodiments, the tablet stand can be configured to be portable and detachably coupled to a keyboard.
    Type: Application
    Filed: June 29, 2012
    Publication date: January 2, 2014
    Inventors: Hiroyuki Noguchi, Eiji Shinohara, Hideaki Hasegawa, Hisashi Shima, Tomoyuki Takahashi, Aaron Michael Stewart
  • Patent number: 8487415
    Abstract: The present invention provides a rectifier element that has a titanium oxide layer interposed between first and second electrodes containing a transition metal with an electronegativity larger than that of Ti, wherein, in the titanium oxide layer, only the interface on the side facing any one of the electrodes has a stoichiometric composition, and wherein the average composition of the whole layer is represented by the formula TiOx (wherein x satisfies the relationship 1.6?x<2), and wherein the rectifying characteristics can be reversed by applying a reverse electrical signal that exceeds the critical reverse electric power between the first and second electrodes in an opposite direction. The present invention also provides a process for producing a rectifier element, which includes the steps of depositing a first electrode that contains a transition metal with an electronegativity larger than that of Ti on a substrate; depositing a layer of titanium oxide (TiOx, wherein x satisfies the relationship 1.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: July 16, 2013
    Assignee: National Institute of Advanced Industrial Science and Technology
    Inventors: Hisashi Shima, Hiroyuki Akinaga, Shoji Ishibashi, Tomoyuki Tamura
  • Patent number: 8054674
    Abstract: Provided is a variable resistive element which performs high speed and low power consumption operation. The variable resistive element comprises a metal oxide layer between first and second electrodes wherein electrical resistance between the first and second electrodes reversibly changes in accordance with application of electrical stress across the first and second electrodes. The metal oxide layer has a filament, which is a current path where the density of a current flowing between the first and second electrodes locally increases. A portion including at least the vicinity of an interface between the certain electrode, which is one or both of the first and second electrodes, and the filament, on an interface between the certain electrode and the metal oxide layer is provided with an interface oxide which is an oxide of at least one element included in the certain electrode and different from the oxide of the metal oxide layer.
    Type: Grant
    Filed: April 7, 2008
    Date of Patent: November 8, 2011
    Assignees: Sharp Kabushiki Kaisha, National Institute of Advanced Industrial Science and Technology
    Inventors: Yukio Tamai, Yasunari Hosoi, Nobuyoshi Awaya, Shigeo Ohnishi, Kazuya Ishihara, Hisashi Shima, Hiroyuki Akinaga, Fumiyoshi Takano
  • Publication number: 20110109556
    Abstract: Embodiments of the invention provide an electronic device, such as a laptop PC, with a keyboard having specialized keys. The specialized keys according to embodiments of the invention are chamfer-less, configured with a larger, ā€œDā€ shaped striking surface having a concavity therein.
    Type: Application
    Filed: January 22, 2010
    Publication date: May 12, 2011
    Applicant: Lenovo (Singapore) Pte. Ltd.
    Inventors: Harriss C.N. Ganey, David W. Hill, Go Osaki, Hisashi Shima, Aaron M. Stewart, John D. Swansey, Tomoyuki Takahashi
  • Publication number: 20110110697
    Abstract: Embodiments of the invention provide an electronic device, such as a laptop PC, with a keyboard having specialized keys. The specialized keys according to embodiments of the invention are chamfer-less, configured with a larger, ā€œDā€ shaped striking surface having a concavity therein.
    Type: Application
    Filed: November 11, 2009
    Publication date: May 12, 2011
    Applicant: Lenovo (Singapore) Pte. Ltd.,
    Inventors: Harriss C.N. Ganey, David W. Hill, Go Osaki, Hisashi Shima, Aaron M. Stewart, John D. Swansey, Tomoyuki Takahashi
  • Patent number: 7923711
    Abstract: The present invention provides switching elements having a readout margin suitable for data storage units of nonvolatile memories, which are obtained by improving the resistance ratio of metal oxide thin films having reversible variable resistance properties. The present invention provides switching elements having a metal oxide consisting of a transition metal and oxygen formed between a first electrode and a second electrode, by modifying one or more of the crystal structure, ionic valence number of metal element, and nonstoichiometricity of a stoichiometric compound consisted of the transition metal and oxygen. The present invention also provides methods for producing switching elements having reversible variable resistance characteristics due to electric power application history.
    Type: Grant
    Filed: July 26, 2007
    Date of Patent: April 12, 2011
    Assignees: National Institute of Advanced Industrial Science and Technology, Sharp Corporation
    Inventors: Hisashi Shima, Hiroyuki Akinaga, Fumiyoshi Takano, Yukio Tamai
  • Patent number: 7894239
    Abstract: The variable resistance element of the present invention is a variable resistance element having an electrode, the other electrode, and a metal oxide material sandwiched between the electrodes and having an electrical resistance, between the electrodes, changing reversibly in response to a voltage applied between the electrodes. The variable resistance element further includes, inside the metal oxide material, a low resistance material having a lower electrical resistance than the metal oxide material and being out of contact with at least either one of the electrodes. This makes it possible to reduce a forming voltage for providing a conductive section inside the metal oxide material, without causing a leakage current to increase.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: February 22, 2011
    Assignees: Sharp Kabushiki Kaisha, National Institute of Advanced Industrial Science and Technology
    Inventors: Yukio Tamai, Yasunari Hosoi, Nobuyoshi Awaya, Shigeo Ohnishi, Kazuya Ishihara, Hisashi Shima, Fumiyoshi Takano, Hiroyuki Akinaga
  • Publication number: 20100276684
    Abstract: The present invention provides a rectifier element that has a titanium oxide layer interposed between first and second electrodes containing a transition metal with an electronegativity larger than that of Ti, wherein, in the titanium oxide layer, only the interface on the side facing any one of the electrodes has a stoichiometric composition, and wherein the average composition of the whole layer is represented by the formula TiOx (wherein x satisfies the relationship 1.6?x<2), and wherein the rectifying characteristics can be reversed by applying a reverse electrical signal that exceeds the critical reverse electric power between the first and second electrodes in an opposite direction. The present invention also provides a process for producing a rectifier element, which includes the steps of depositing a first electrode that contains a transition metal with an electronegativity larger than that of Ti on a substrate; depositing a layer of titanium oxide (TiOx, wherein x satisfies the relationship 1.
    Type: Application
    Filed: October 30, 2008
    Publication date: November 4, 2010
    Inventors: Hisashi Shima, Hiroyuki Akinaga, Shoji Ishibashi, Tomoyuki Tamura
  • Publication number: 20100172170
    Abstract: Provided is a variable resistive element which performs high speed and low power consumption operation. The variable resistive element comprises a metal oxide layer between first and second electrodes wherein electrical resistance between the first and second electrodes reversibly changes in accordance with application of electrical stress across the first and second electrodes. The metal oxide layer has a filament, which is a current path where the density of a current flowing between the first and second electrodes locally increases. A portion including at least the vicinity of an interface between the certain electrode, which is one or both of the first and second electrodes, and the filament, on an interface between the certain electrode and the metal oxide layer is provided with an interface oxide which is an oxide of at least one element included in the certain electrode and different from the oxide of the metal oxide layer.
    Type: Application
    Filed: April 7, 2008
    Publication date: July 8, 2010
    Inventors: Yukio Tamai, Yasunari Hosoi, Nobuyoshi Awaya, Shigeo Ohnishi, Kazuya Ishihara, Hisashi Shima, Hiroyuki Akinaga, Fumiyoshi Takano
  • Patent number: D738379
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: September 8, 2015
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Harris C. N. Ganey, David W. Hill, Go Osaki, Hisashi Shima, Aaron Michael Stewart, John D. Swansey, Tomoyuki Takahashi