Patents by Inventor Kazuo Aoki

Kazuo Aoki 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: 20210273060
    Abstract: A field-effect transistor includes a Ga2O3-based semiconductor layer, a source region and a drain region that are formed inside the Ga2O3-based semiconductor layer, a gate electrode that is formed, via a gate insulating film, on a channel region as the Ga2O3-based semiconductor layer between the source region and the drain region, a source electrode connected to the source region, and a drain electrode connected to the drain region. An interface charge including a negative charge is formed between the gate electrode and the channel region, and a gate threshold voltage is not less than 4.5V.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 2, 2021
    Applicant: Novel Crystal Technology, Inc.
    Inventors: Tadashi KASE, Kazuo AOKI, Shigenobu YAMAKOSHI, Yuki UCHIDA
  • Publication number: 20210006111
    Abstract: According to one embodiment, a rotor core satisfies a relationship: W2/W1 (A1+A2)/A1. Where, A1 represents an area of a region defined by a polar central axis, an outer circumferential surface of the rotor core and a first imaginary linear line extending on an outer circumferential-side long edge of an embedding hole, A2 represents an area of a region defined by the polar central axis, a q-axis, the outer circumferential surface of the rotor core, a second imaginary linear line extending on an inner circumferential-side long edge of the embedding hole, a third imaginary linear line extending on a first edge of the cavity hole, W1 represents a half-width of a first bridge portion, and W2 represents a half-width of the second bridge portion.
    Type: Application
    Filed: September 18, 2020
    Publication date: January 7, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Yusuke MATSUOKA, Masakatsu MATSUBARA, Kazuo AOKI
  • Patent number: 10836961
    Abstract: A phosphor-containing member includes a transparent member, and a plurality of granular single crystal phosphors dispersed in the transparent member. Each of the plurality of granular single crystal phosphors includes a YAG crystal as a mother crystal. The plurality of granular single crystal phosphors are prepared by crushing the YAG crystal. The YAG crystal has a composition represented by a formula of Y3-x-yGdxCeyAl5O12-w (0.03?x?0.2, 0.003?y?0.2, ?0.2?w?0.2). Reduction of fluorescence intensity of the phosphors is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25° C. to 100° C.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: November 17, 2020
    Assignees: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Makoto Watanabe, Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Publication number: 20200220052
    Abstract: As one of purposes, the present invention provides: a single-crystal phosphor which can exhibit excellent properties under high-temperature conditions; and a light-emitting device in which the phosphor is used. As one embodiment, a single-crystal phosphor is provided, which has a chemical composition represented by the compositional formula: Y1-x-y-zLuxGdyCez)3+aAl5-aO12(0?x?0.9994, 0?y?0.0669, 0.0002?z?0.0067,?0.016?a?0.315).
    Type: Application
    Filed: March 17, 2020
    Publication date: July 9, 2020
    Applicants: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Daisuke INOMATA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
  • Publication number: 20200203581
    Abstract: A phosphor-containing member includes a transparent member, and particles of a single crystal phosphor dispersed in the transparent member. The single crystal phosphor has a composition represented by a compositional formula (Y1?a?bLuaCeb)3+cAl5?cO12 (where 0?a?0.9994, 0.0002?b?0.0067, ?0.016?c?0.315), and Commission International de l'Eclairage (CIE) chromaticity coordinates x, y of an emission spectrum satisfy a relationship of ?0.4377x+0.7384?y??0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25° C.
    Type: Application
    Filed: February 27, 2020
    Publication date: June 25, 2020
    Inventors: Daisuke INOMATA, Yusuke ARAI, Hiroaki SANO, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
  • Patent number: 10642164
    Abstract: Provided is a defect detection device including an illumination unit including a condenser lens and a plurality of light beam synthesis units, and a detection unit detecting scattered light generated on a sample by the illumination unit. The condenser lens condenses a plurality of light beams, emitted onto the sample and having substantially the same wavelength and substantially the same polarization, on the sample. The plurality of light beam synthesis units bring the plurality of light beams close to each other and make the light beams have light paths parallel to the optical axis of the condenser lens.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: May 5, 2020
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Yuko Otani, Kazuo Aoki, Toshifumi Honda, Nobuhiko Kanzaki
  • Patent number: 10593062
    Abstract: A defect observation apparatus includes a storage unit configured to store defect information about defects detected by an external inspection apparatus; a first imaging unit configured to capture an image of a defect using a first imaging condition and a second imaging condition; a control unit configured to correct positional information on the defect using the image captured with the first imaging unit; and a second imaging unit configured to capture an image of the defect based on the corrected positional information.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 17, 2020
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Yuko Otani, Kazuo Aoki, Yohei Minekawa
  • Publication number: 20190358904
    Abstract: A filament which can give an arbitrary hardness to a three-dimensional molded object and is not bent in a conveying process and a method of manufacturing the same are provided. In the present invention, a filament used as a material of a printed matter printed by a three-dimensional printing device using a fused deposition modeling method (FDM) is configured to contain a polylactic acid resin and a thermoplastic elastomer.
    Type: Application
    Filed: May 22, 2017
    Publication date: November 28, 2019
    Inventors: Hidetoshi Hotta, Kazuo Aoki, Fumio Tanabe
  • Patent number: 10340429
    Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: July 2, 2019
    Assignees: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Daisuke Inomata, Hiroaki Sano, Seitaro Yoshida, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Patent number: 10269536
    Abstract: The objective of the present invention is to simultaneously achieve image observations at a high resolution using an electron microscope, and X-ray analysis at a high energy-resolution using a microcalorimeter. An X-ray detector is disposed at a position where the intensity of the magnetic field from an objective lens is weaker than the critical magnetic field of a material used in a thermal insulation shield for a superconducting transition-edge sensor or a microcalorimeter. In addition, an optical system for transmitting X-rays to the detector is inserted between a sample and the detector. Alternatively, a magnetic field shield for shielding the X-ray detector is used.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: April 23, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Satoshi Takada, Naomasa Suzuki, Kazuo Aoki, Takehiko Konno, Takayuki Hoshino
  • Publication number: 20180240643
    Abstract: The objective of the present invention is to simultaneously achieve image observations at a high resolution using an electron microscope, and X-ray analysis at a high energy-resolution using a microcalorimeter. An X-ray detector is disposed at a position where the intensity of the magnetic field from an objective lens is weaker than the critical magnetic field of a material used in a thermal insulation shield for a superconducting transition-edge sensor or a microcalorimeter. In addition, an optical system for transmitting X-rays to the detector is inserted between a sample and the detector. Alternatively, a magnetic field shield for shielding the X-ray detector is used.
    Type: Application
    Filed: March 25, 2015
    Publication date: August 23, 2018
    Inventors: Satoshi TAKADA, Naomasa SUZUKI, Kazuo AOKI, Takehiko KONNO, Takayuki HOSHINO
  • Publication number: 20180088469
    Abstract: Provided is a defect detection device including an illumination unit including a condenser lens and a plurality of light beam synthesis units, and a detection unit detecting scattered light generated on a sample by the illumination unit. The condenser lens condenses a plurality of light beams, emitted onto the sample and having substantially the same wavelength and substantially the same polarization, on the sample. The plurality of light beam synthesis units bring the plurality of light beams close to each other and make the light beams have light paths parallel to the optical axis of the condenser lens.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 29, 2018
    Inventors: Yuko OTANI, Kazuo AOKI, Toshifumi HONDA, Nobuhiko KANZAKI
  • Publication number: 20180044588
    Abstract: A flat plate-shaped phosphor member includes a plurality of granular single crystal phosphors, each of which including a YAG crystal as a mother crystal, the YAG crystal having a composition represented by a formula of Y3-x-yGdxCeyAl5O12-w (0.03?x?0.2, 0.003?y?0.2, ?0.2?w?0.2). Reduction of fluorescence intensity of the phosphor is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25° C. to 100° C.
    Type: Application
    Filed: October 4, 2017
    Publication date: February 15, 2018
    Inventors: Makoto WATANABE, Daisuke INOMATA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
  • Publication number: 20170249753
    Abstract: A defect observation apparatus includes a storage unit configured to store defect information about defects detected by an external inspection apparatus; a first imaging unit configured to capture an image of a defect using a first imaging condition and a second imaging condition; a control unit configured to correct positional information on the defect using the image captured with the first imaging unit; and a second imaging unit configured to capture an image of the defect based on the corrected positional information.
    Type: Application
    Filed: December 21, 2016
    Publication date: August 31, 2017
    Inventors: Yuko OTANI, Kazuo AOKI, Yohei MINEKAWA
  • Publication number: 20170186923
    Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.
    Type: Application
    Filed: March 16, 2017
    Publication date: June 29, 2017
    Applicants: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Daisuke INOMATA, Hiroaki SANO, Seitaro YOSHIDA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
  • Publication number: 20170179346
    Abstract: A light-emitting device includes a light-emitting element to emit a bluish light, and a yellowish phosphor to absorb the light emitted by the light-emitting element and produce a yellowish fluorescence. The yellowish phosphor comprises a single crystal phosphor comprising a composition represented by a compositional formula (Y1-a-bLuaCeb)3+cAl5-cO12 (where 0?a?0.9994, 0.001?b?0.0067, ?0.016?c?0.315. Commission International de l'Eclairage (CIE) chromaticity coordinates x and y of an emission spectrum obtained by using CIE 1931 color-matching function to satisfy a relationship of ?0.4377x+0.7384?y??0.4377x+0.7504 when a peak wavelength of excitation light is 450 nm and temperature is 25° C. The single crystal phosphor is disposed off of the light-emitting element.
    Type: Application
    Filed: March 9, 2017
    Publication date: June 22, 2017
    Inventors: Daisuke INOMATA, Yusuke ARAI, Hiroaki SANO, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA
  • Patent number: 9634216
    Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: April 25, 2017
    Assignees: Koha Co., Ltd., Tamura Corporation, National Institute for Materials Science
    Inventors: Daisuke Inomata, Hiroaki Sano, Seitaro Yoshida, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Patent number: 9571026
    Abstract: An inverter apparatus that includes an inverter that is interposed between an AC rotary electric machine and both a DC power supply and a smoothing capacitor and that includes a plurality of switching elements; a controller that controls driving of the plurality of switching elements; and a current sensor that detects a current flowing through a wire connecting the DC power supply and the inverter together, wherein the controller determines whether or not to stop driving of all of the plurality of switching elements based on the current detected by the current sensor while the AC rotary electric machine is caused to perform a regenerative operation of generating power.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: February 14, 2017
    Assignee: AISIN AW CO., LTD.
    Inventors: Hiromichi Agata, Kazuo Aoki, Yasushi Nakamura
  • Publication number: 20160240748
    Abstract: As one of purposes, the present invention provides: a single-crystal phosphor which can exhibit excellent properties under high-temperature conditions; and a light-emitting device in which the phosphor is used. As one embodiment, a single-crystal phosphor is provided, which has a chemical composition represented by the compositional formula: (Y1-x-y-zLuxGdyCez)3+aAl5-aO12(0?x?0.9994, 0?y?0.0669, 0.0002?z?0.0067, ?0.016?a?0.315).
    Type: Application
    Filed: October 20, 2014
    Publication date: August 18, 2016
    Applicants: KOHA CO., LTD., NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Daisuke Inomata, Kazuo Aoki, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Publication number: 20160190418
    Abstract: According to one embodiment of the present invention, the light emitting device includes an LED element, a side wall which surrounds the LED element, a phosphor layer which is fixed to the side wall with an adhesive layer therebetween, and is positioned above the LED element, and a metal pad as a heat dissipating member. The side wall includes an insulating base which surrounds the LED element and a metal layer which is formed on a side surface at the LED element side of the base, and is in contact with the metal pad and the adhesive layer. The adhesive layer includes a resin layer that includes a resin containing particles which have higher thermal conductivity than the resin or a layer that includes solder.
    Type: Application
    Filed: August 8, 2014
    Publication date: June 30, 2016
    Applicants: KOHA CO., LTD., TAMURA CORPORATION, NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Daisuke INOMATA, Hiroaki SANO, Seitaro YOSHIDA, Kazuo AOKI, Kiyoshi SHIMAMURA, Encarnacion Antonia GARCIA VILLORA