Patents by Inventor Kiyoshi Yamazaki

Kiyoshi Yamazaki 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: 20210280221
    Abstract: To provide a novel semiconductor device.
    Type: Application
    Filed: April 16, 2021
    Publication date: September 9, 2021
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Tatsuya ONUKI, Takanori MATSUZAKI, Kiyoshi KATO, Shunpei YAMAZAKI
  • Patent number: 11114470
    Abstract: A novel semiconductor device formed with single-polarity circuits using OS transistors is provided. Thus, connection between different layers in a memory circuit is unnecessary. This can reduce the number of connection portions and improve the flexibility of circuit layout and the reliability of the OS transistors. In particular, many memory cells are provided; thus, the memory cells are formed with single-polarity circuits, whereby the number of connection portions can be significantly reduced. Further, by providing a driver circuit in the same layer as the cell array, many wirings for connecting the driver circuit and the cell array can be prevented from being provided between layers, and the number of connection portions can be further reduced. An interposer provided with a plurality of integrated circuits can function as one electronic component.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: September 7, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kiyoshi Kato, Tomoaki Atsumi
  • Publication number: 20210273110
    Abstract: A novel memory device is provided. The memory device includes a plurality of first wirings extending in a first direction, a plurality of memory element groups, and an oxide layer extending along a side surface of the first wiring. Each of the memory element groups includes a plurality of memory elements. Each of the memory elements includes a first transistor and a capacitor. A gate electrode of the first transistor is electrically connected to the first wiring. The oxide layer includes a region in contact with a semiconductor layer of the first transistor. A second transistor is provided between the adjacent memory element groups. A high power supply potential is supplied to one or both of a source electrode and a drain electrode of the second transistor.
    Type: Application
    Filed: July 29, 2019
    Publication date: September 2, 2021
    Inventors: Tatsuya ONUKI, Kiyoshi KATO, Tomoaki ATSUMI, Shunpei YAMAZAKI
  • Patent number: 11101299
    Abstract: It is an object of the present invention to provide a semiconductor display device having an interlayer insulating film which can obtain planarity of a surface while controlling film formation time, can control treatment time of heating treatment with an object of removing moisture, and can prevent moisture in the interlayer insulating film from being discharged to a film or an electrode adjacent to the interlayer insulating film. An inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover a TFT. Next, an organic resin film containing photosensitive acrylic resin is applied to the organic insulting film, and the organic resin film is partially exposed to light to be opened. Thereafter, an inorganic insulting film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is fanned so as to cover the opened organic resin film.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: August 24, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Satoshi Murakami, Masahiko Hayakawa, Kiyoshi Kato, Mitsuaki Osame
  • Patent number: 11008663
    Abstract: The electrolysis system of the present invention has a water electrolysis unit equipped with a water electrolysis cell using a solid polymer electrolyte membrane as its diaphragm, a DC power source for supplying the water electrolysis cell with a DC current, and a mitigation unit for mitigating, when a counter electromotive force or abrupt potential fluctuation occurs in the water electrolysis cell, the counter electromotive force or the potential fluctuation. The mitigation unit is preferably a coil+diode (A) connected in parallel between the DC power source and the water electrolysis cell or a diode (B) connected between the DC power source and the water electrolysis cell. The electrolysis system is preferably equipped further with a lowering rate controller for controlling the lowering rate of a current supplied from the DC power source to the water electrolysis cell.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 18, 2021
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hajime Murata, Kiyoshi Yamazaki
  • Publication number: 20190348687
    Abstract: A bipolar plate includes a substrate and a coating film that is formed at least on a part of a surface of the substrate. The coating film includes a phosphide having a composition represented by M2-xTixP, where M is any one or more elements selected from the group consisting of Ni, Co, Fe, Mn and Cr, and 0.1?x?1.9. The coating film preferably includes two kinds or more of the metal elements M, and preferably has a thickness ranging from 0.05 ?m or greater to 100 ?m or less.
    Type: Application
    Filed: March 4, 2019
    Publication date: November 14, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hiroaki WAKAYAMA, Nobuaki SUZUKI, Hajime MURATA, Kiyoshi YAMAZAKI
  • Publication number: 20190161874
    Abstract: The electrolysis system of the present invention has a water electrolysis unit equipped with a water electrolysis cell using a solid polymer electrolyte membrane as its diaphragm, a DC power source for supplying the water electrolysis cell with a DC current, and a mitigation unit for mitigating, when a counter electromotive force or abrupt potential fluctuation occurs in the water electrolysis cell, the counter electromotive force or the potential fluctuation. The mitigation unit is preferably a coil+diode (A) connected in parallel between the DC power source and the water electrolysis cell or a diode (B) connected between the DC power source and the water electrolysis cell. The electrolysis system is preferably equipped further with a lowering rate controller for controlling the lowering rate of a current supplied from the DC power source to the water electrolysis cell.
    Type: Application
    Filed: October 25, 2018
    Publication date: May 30, 2019
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hajime MURATA, Kiyoshi YAMAZAKI
  • Patent number: 9566566
    Abstract: A hydrogen production catalyst used for generating hydrogen by splitting water, the catalyst comprising a composite metal oxide of cerium oxide and praseodymium oxide.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: February 14, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventor: Kiyoshi Yamazaki
  • Patent number: 9475003
    Abstract: An exhaust gas purification catalyst includes an alumina support, a silica layer, and active metal particles. The silica layer is formed on a surface of the alumina support. The active metal particles are formed of platinum and palladium, the platinum and the palladium being supported on the silica layer. A ratio of fine particles having a particle size of 2.0 nm or less to all the active metal particles is 50% or higher in terms of the number of particles, the fine particles being included in the active metal particles. A ratio of fine alloy particles having a palladium content ratio of 10 at % to 90 at % to all the fine particles is 50% or higher in terms of the number of particles, the fine alloy particles being included in the fine particles.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: October 25, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuto Hirose, Kiyoshi Yamazaki, Yuichi Sobue, Yusuke Shinmyo
  • Publication number: 20150343424
    Abstract: An exhaust gas purification catalyst includes: a support formed of alumina and yttria; and platinum and palladium that are supported on the support. An yttria content in the support is 2 mass % to 15 mass %. A content ratio of the platinum to the palladium is in a range of 1 to 10 by mass ratio. At least a portion of the platinum and at least a portion of the palladium constitute a solid solution. A diffraction peak of a (311) plane of a crystal including the platinum, the palladium and the solid solution is present at 81.5° or higher in a range of 81.2° to 82.1°, the diffraction peak being identified by an X-ray diffraction method using CuK? rays.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 3, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiyoshi YAMAZAKI, Chika KATO, Masashi KIKUGAWA, Tsuyoshi HAMAGUCHI, Yuichi SOBUE, Yusuke SHINMYO
  • Publication number: 20150343423
    Abstract: An exhaust gas purification catalyst includes an alumina support, a silica layer, and active metal particles. The silica layer is formed on a surface of the alumina support. The active metal particles are formed of platinum and palladium, the platinum and the palladium being supported on the silica layer. A ratio of fine particles having a particle size of 2.0 nm or less to all the active metal particles is 50% or higher in terms of the number of particles, the fine particles being included in the active metal particles. A ratio of fine alloy particles having a palladium content ratio of 10 at % to 90 at % to all the fine particles is 50% or higher in terms of the number of particles, the fine alloy particles being included in the fine particles.
    Type: Application
    Filed: June 1, 2015
    Publication date: December 3, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takuto HIROSE, Kiyoshi YAMAZAKI, Yuichi SOBUE, Yusuke SHINMYO
  • Patent number: 9162203
    Abstract: A hydrogen generator into which a mixed gas is run and out of which a reformed gas including hydrogen is discharged, which can reliably control the hydrogen concentration in the reformed gas to a desired concentration. The hydrogen generator is provided with an upstream side oxidation unit and a downstream side decomposition unit, burns part of the compound in the mixed gas in the oxidation unit using the oxygen in the mixed gas so as to generate heat of combustion, and uses the heat of combustion to break down another part of the compound in the mixed gas in the decomposition unit so as to generate hydrogen. The hydrogen generator is provided with a first temperature sensor controller.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: October 20, 2015
    Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Hiroshi Miyagawa, Makoto Koike, Kiyoshi Yamazaki, Keiji Toh, Shohei Matsumoto, Tomojiro Sugimoto, Rioh Shimizu, Susumu Kojima
  • Publication number: 20150285116
    Abstract: An exhaust gas purification catalyst includes: a support containing alumina as a major component; and an active species fine particle containing silver sulfate as a major component and having an average crystallite size of 3 nm to less than 100 nm, in which the active species fine particle is supported on a surface of the support.
    Type: Application
    Filed: March 31, 2015
    Publication date: October 8, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masashi KIKUGAWA, Kiyoshi YAMAZAKI, Yuichi SOBUE, Seiji OKAWARA
  • Patent number: 8904765
    Abstract: The internal combustion engine has an upstream side NOx selective reduction catalyst and a downstream side NOx selective reduction catalyst which are arranged in an engine exhaust passage. The upstream side NOx selective reduction catalyst has a region where the NOx removal rate becomes substantially constant when the ratio of concentration of ammonia to NOx of the inflowing exhaust rises. The internal combustion engine has an operating state in that region where the ratio of concentration of ammonia to NOx is maintained. The downstream side NOx selective reduction catalyst has an ammonia oxidation ability which is larger than the upstream side NOx selective reduction catalyst.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: December 9, 2014
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Hiroshi Miyagawa, Kiyoshi Yamazaki
  • Publication number: 20130336879
    Abstract: A hydrogen production catalyst used for generating hydrogen by splitting water, the catalyst comprising a composite metal oxide of cerium oxide and praseodymium oxide.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 19, 2013
    Inventor: Kiyoshi YAMAZAKI
  • Patent number: 8475921
    Abstract: A composite material includes an aggregate which contains a first metal particle constituting a core and second metal oxide particulates surrounding the first metal particle and having an average primary particle diameter ranging from 1 to 100 nm.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: July 2, 2013
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Tomoyuki Kayama, Kouzi Banno, Kiyoshi Yamazaki, Koji Yokota
  • Publication number: 20090308060
    Abstract: A process for purifying exhaust gases includes the steps of collecting PMs, forcibly exhausting PMs, and purifying PMs. In the step of purifying PMs, PMs in exhaust gases are collected with a filter. In the step of forcibly exhausting PMs, PMs, which are collected on the filter, are exhausted by blowing a pressurized gas onto the filter, thereby forming PMs-containing gases. In the step of purifying PMs, PMs, which are contained in the PMs-containing gases, are purified by contacting an oxidizing agent with the PMs-containing gases, thereby removing the PMs from the PMs-containing gases by means of oxidation.
    Type: Application
    Filed: April 6, 2006
    Publication date: December 17, 2009
    Inventors: Juij Suzuki, Kiyoshi Yamazaki, Yuji Sakakibara
  • Publication number: 20090209415
    Abstract: A composite material includes an aggregate which contains a first metal particle constituting a core and second metal oxide particulates surrounding the first metal particle and having an average primary particle diameter ranging from 1 to 100 nm.
    Type: Application
    Filed: July 20, 2006
    Publication date: August 20, 2009
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Tomoyuki Kayama, Kouzi Banno, Kiyoshi Yamazaki, Koji Yokota
  • Patent number: 6978750
    Abstract: The thickness in the width direction of a pair of side wall sections 4 is made as uniform as possible. In use, a load is applied to the pivot 3 from the side of the first and second connecting sections 5, 6 which connect the pair of side wall sections 4. A crimped section 13a is formed on the outer periphery at the opposite end surfaces of the pivot 3b, on the half on the side of the connecting sections 5, 6. Therefore, the outer peripheral surface of the opposite ends of the pivot 3b comes into contact with the inner peripheral surface of the through hole 11 on the load support side. Consequently, the load is sufficiently supported by the contact surface, and even after being used for a long time of period, lost motion is prevented from occurring on the support section at the opposite ends of the pivot 3 with respect to the pair of side wall section 4.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: December 27, 2005
    Assignee: NSK Ltd.
    Inventor: Kiyoshi Yamazaki
  • Patent number: 6933259
    Abstract: This composite oxide powder can secure a large pore volume even after calcination at high temperature and, when a catalyst is formed by loading a noble metal on this composite oxide powder, noble metal grain growth can be suppressed. The composite oxide powder comprises particles of an oxide of a metal M1 and an oxide of a metal M2 which does not dissolve in the oxide of the metal M1, the oxide of the metal M1 and the oxide of the metal M2 being dispersed at the nanometer level. Since different oxides serve as a barrier to each other, sintering is suppressed. Therefore, in the case of composite oxide powder comprising Ce as a metal M1 and Al as a metal M2, grain growth is small even after exposed to high temperature and pores of 3.5-100 nm secure a volume of 0.07 cc/g or more after calcination at 600° C. for 5 hours and a volume of 0.04 cc/g or more after calcination at 800° C. for 5 hours.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: August 23, 2005
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Miho Hatanaka, Akira Morikawa, Akihiko Suda, Hideo Sobukawa, Kiyoshi Yamazaki