Patents by Inventor Yasuhisa Naitoh
Yasuhisa Naitoh 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).
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Publication number: 20240127982Abstract: 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: ApplicationFiled: January 27, 2022Publication date: April 18, 2024Applicants: 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
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Patent number: 11889776Abstract: 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: GrantFiled: June 23, 2021Date of Patent: January 30, 2024Assignee: Nuvoton Technology Corporation JapanInventors: Ryutaro Yasuhara, Satoru Fujii, Takumi Mikawa, Atsushi Himeno, Kengo Nishio, Takehide Miyazaki, Hiroyuki Akinaga, Yasuhisa Naitoh, Hisashi Shima
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Publication number: 20220407003Abstract: 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: ApplicationFiled: August 26, 2022Publication date: December 22, 2022Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Hisashi SHIMA, Yasuhisa NAITOH, Hiroyuki AKINAGA, Makoto TAKAHASHI
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Publication number: 20220254998Abstract: 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: ApplicationFiled: August 28, 2020Publication date: August 11, 2022Applicants: 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
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Publication number: 20210320248Abstract: 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: ApplicationFiled: June 23, 2021Publication date: October 14, 2021Inventors: Ryutaro YASUHARA, Satoru FUJII, Takumi MIKAWA, Atsushi HIMENO, Kengo NISHIO, Takehide MIYAZAKI, Hiroyuki AKINAGA, Yasuhisa NAITOH, Hisashi SHIMA
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Patent number: 10418538Abstract: A thermoelectric material is manufactured by a manufacturing process including annealing at an annealing temperature from 125° C. to 200° C. and for an annealing time from 5 minutes to 12 hours applied to a substance selected from the group consisting of conductive polymer, polystyrene sulfonate (PSS), tosylate (TOS), chloride and perchlorate and a substance as solvent selected from the group consisting of ethylene glycol, ethanol, dimethyl sulfoxide and isopropanol.Type: GrantFiled: February 23, 2017Date of Patent: September 17, 2019Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Masakazu Mukaida, Qingshuo Wei, Takao Ishida, Yasuhisa Naitoh
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Publication number: 20170162777Abstract: A thermoelectric material is manufactured by a manufacturing process including annealing at an annealing temperature from 125° C. to 200° C. and for an annealing time from 5 minutes to 12 hours applied to a substance selected from the group consisting of conductive polymer, polystyrene sulfonate (PSS), tosylate (TOS), chloride and perchlorate and a substance as solvent selected from the group consisting of ethylene glycol, ethanol, dimethyl sulfoxide and isopropanol.Type: ApplicationFiled: February 23, 2017Publication date: June 8, 2017Inventors: Masakazu Mukaida, Qingshuo Wei, Takao Ishida, Yasuhisa Naitoh
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Patent number: 9236569Abstract: A storage element includes a first electrode and a second electrode separated by a gap and a dielectric layer provided between the first electrode and the second electrode to fill the gap. A separation distance of the gap changes in response to application of a voltage to a space between the first electrode and the second electrode, such that a switching phenomenon is produced which switches a resistance state between the first electrode and the second electrode between a high resistance state in which it is difficult for tunnel current to flow and a low resistance state in which it is easy for tunnel current to flow.Type: GrantFiled: October 28, 2014Date of Patent: January 12, 2016Assignee: Funai Electric Co., Ltd.Inventors: Shigeo Furuta, Yuichiro Masuda, Tsuyoshi Takahashi, Masatoshi Ono, Yutaka Hayashi, Taro Itaya, Yasuhisa Naitoh, Tetsuo Shimizu
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Publication number: 20150214457Abstract: A thermoelectric material is manufactured by a manufacturing process including annealing at an annealing temperature from 125° C. to 200° C. and for an annealing time from 5 minutes to 12 hours applied to a substance selected from the group consisting of conductive polymer, polystyrene sulfonate (PSS), tosylate (TOS), chloride and perchlorate and a substance as solvent selected from the group consisting of ethylene glycol, ethanol, dimethyl sulfoxide and isopropanol.Type: ApplicationFiled: July 2, 2013Publication date: July 30, 2015Inventors: Masakazu Mukaida, Qingshuo Wei, Takao Ishida, Yasuhisa Naitoh
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Publication number: 20150123069Abstract: A storage element includes a first electrode and a second electrode separated by a gap and a dielectric layer provided between the first electrode and the second electrode to fill the gap. A separation distance of the gap changes in response to application of a voltage to a space between the first electrode and the second electrode, such that a switching phenomenon is produced which switches a resistance state between the first electrode and the second electrode between a high resistance state in which it is difficult for tunnel current to flow and a low resistance state in which it is easy for tunnel current to flow.Type: ApplicationFiled: October 28, 2014Publication date: May 7, 2015Inventors: Shigeo FURUTA, Yuichiro MASUDA, Tsuyoshi TAKAHASHI, Masatoshi ONO, Yutaka HAYASHI, Taro ITAYA, Yasuhisa NAITOH, Tetsuo SHIMIZU
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Patent number: 8653912Abstract: There is provided a switching element which facilitates integration with higher density and lamination in a device, the switching element including: an insulating substrate; a first electrode provided on the insulating substrate; a second electrode provided above the first electrode; and a between-electrode gap section provided between the first electrode and the second electrode and including a nanometer-scale gap for causing a switching phenomenon of a resistor by applying a prescribed voltage between the first electrode and the second electrode.Type: GrantFiled: June 13, 2008Date of Patent: February 18, 2014Assignees: Funai Electric Advanced Applied Technology Research Institute Inc., National Institute of Advanced Industrial Science and Technology, Funai Electric Co., Ltd.Inventors: Shigeo Furuta, Tsuyoshi Takahashi, Masatoshi Ono, Yasuhisa Naitoh, Tetsuo Shimizu
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Patent number: 8395185Abstract: A switching element comprising: an insulative substrate; a first electrode and a second electrode provided on one surface of the insulative substrate; and an interelectrode gap which is provided between the first electrode and the second electrode, and which has a gap on the order of nanometers in which switching phenomenon of resistance occurs by applying predetermined voltage between the first electrode and the second electrode, wherein the one surface of the insulative substrate contains nitrogen.Type: GrantFiled: June 17, 2008Date of Patent: March 12, 2013Assignees: Funai Electric Advanced Applied Technology Research Institute Inc., National Institute of Advanced Industrial Science and Technology, Funai Electric Co., Ltd.Inventors: Shigeo Furuta, Yuichiro Masuda, Tsuyoshi Takahashi, Masatoshi Ono, Yasuhisa Naitoh, Masayo Horikawa, Tetsuo Shimizu
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Patent number: 8093518Abstract: A switching element 100 includes an insulating substrate 10, a first electrode 20 provided on the insulating substrate 10, a second electrode 30 provided on the insulating substrate 10, and an interelectrode gap 40 provided between the first electrode 20 and the second electrode 30, a distance G between the first electrode 20 and the second electrode 30 being 0 nm<G?50 nm.Type: GrantFiled: September 25, 2006Date of Patent: January 10, 2012Assignees: National Institute of Advanced Industrial Science and Technology, Funai Electric Advanced Applied Technology Research Institute, Inc.Inventors: Yasuhisa Naitoh, Masayo Horikawa, Hidekazu Abe, Tetsuo Shimizu, Wataru Mizutani, Shigeo Furuta, Masatoshi Ono, Tsuyoshi Takahashi
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Patent number: 8022383Abstract: A two-terminal resistance switching element, wherein two silicon films each doped with an impurity are arranged with a gap width in the order of nanometers. The gap width is in the range of from 0.1 nm to 100 nm. A semiconductor device can be obtained by providing the two-terminal resistance switching element in a memory, a storage device or other device.Type: GrantFiled: June 13, 2008Date of Patent: September 20, 2011Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Yasuhisa Naitoh, Yukinori Morita, Masayo Horikawa, Tetsuo Shimizu
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Patent number: 7990751Abstract: A nanogap switching element is equipped with an inter-electrode gap portion including a gap of a nanometer order between a first electrode and a second electrode. A switching phenomenon is caused in the inter-electrode gap portion by applying a voltage between the first and second electrodes. The nanogap switching element is shifted from its low resistance state to its high resistance state by receiving a voltage pulse application of a first voltage value, and shifted from its high resistance state to its low resistance state by receiving a voltage pulse application of a second voltage value lower than the first voltage value. When the nanogap switching element is shifted from the high resistance state to the low resistance state, a voltage pulse of an intermediate voltage value between the first and second voltage values is applied thereto before the voltage pulse application of the second voltage value thereto.Type: GrantFiled: December 18, 2008Date of Patent: August 2, 2011Assignees: Funai Electric Advanced Applied Technology Research Institute Inc., National Institute of Advanced Industrial Science and Technology, Funai Electric Co., Ltd.Inventors: Yuichiro Masuda, Shigeo Furuta, Tsuyoshi Takahashi, Tetsuo Shimizu, Yasuhisa Naitoh, Masayo Horikawa
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Publication number: 20110108399Abstract: There is provided a switching element which facilitates integration with higher density and lamination in a device, the switching element including: an insulating substrate; a first electrode provided on the insulating substrate; a second electrode provided above the first electrode; and a between-electrode gap section provided between the first electrode and the second electrode and including a nanometer-scale gap for causing a switching phenomenon of a resistor by applying a prescribed voltage between the first electrode and the second electrode.Type: ApplicationFiled: June 13, 2008Publication date: May 12, 2011Inventors: Shigeo Furuta, Tsuyoshi Takahashi, Masatoshi Ono, Yasuhisa Naitoh, Tetsuo Shimizu
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Patent number: 7902586Abstract: A non-volatile memory device 100 contains: an insulating substrate 10; a first electrode 20 provided on the insulating substrate 10; a second electrode 30 provided on the insulating substrate 10; and a gap 40 set between the first electrode 20 and the second electrode 30, in which a distance G between the first electrode 20 and the second electrode 30 is: 0 nm<G?50 nm.Type: GrantFiled: October 26, 2007Date of Patent: March 8, 2011Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Yasuhisa Naitoh, Tetsuo Shimizu, Masayo Horikawa, Hidekazu Abe
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Publication number: 20090251199Abstract: A switching element 100 includes an insulating substrate 10, a first electrode 20 provided on the insulating substrate 10, a second electrode 30 provided on the insulating substrate 10, and an interelectrode gap 40 provided between the first electrode 20 and the second electrode 30, a distance G between the first electrode 20 and the second electrode 30 being 0 nm<C?50 nm.Type: ApplicationFiled: September 25, 2006Publication date: October 8, 2009Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, FUNAI ELECTRIC ADVANCED APPLIED TECHNOLOGY RESEARCH INSTITUTE INC.Inventors: Yasuhisa Naitoh, Masayo Horikawa, Hidekazu Abe, Tetsuo Shimizu, Wataru Mizutani, Shigeo Furuta, Masatoshi Ono, Tsuyoshi Takahashi
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Publication number: 20090161407Abstract: A nanogap switching element is equipped with an inter-electrode gap portion including a gap of a nanometer order between a first electrode and a second electrode. A switching phenomenon is caused in the inter-electrode gap portion by applying a voltage between the first and second electrodes. The nanogap switching element is shifted from its low resistance state to its high resistance state by receiving a voltage pulse application of a first voltage value, and shifted from its high resistance state to its low resistance state by receiving a voltage pulse application of a second voltage value lower than the first voltage value. When the nanogap switching element is shifted from the high resistance state to the low resistance state, a voltage pulse of an intermediate voltage value between the first and second voltage values is applied thereto before the voltage pulse application of the second voltage value thereto.Type: ApplicationFiled: December 18, 2008Publication date: June 25, 2009Applicants: Funai Electric Advanced Applied Technology Research Institute Inc., National Institute of Advanced Industrial Science and Technology, Funai Electric Co., Ltd.Inventors: Yuichiro MASUDA, Shigeo FURUTA, Tsuyoshi TAKAHASHI, Tetsuo SHIMIZU, Yasuhisa NAITOH, Masayo HORIKAWA
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Publication number: 20090039330Abstract: A two-terminal resistance switching element, wherein two silicon films each doped with an impurity are arranged with a gap width in the order of nanometers.Type: ApplicationFiled: June 13, 2008Publication date: February 12, 2009Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Yasuhisa Naitoh, Yukinori Morita, Masayo Horikawa, Tetsuo Shimizu