Patents by Inventor Yohei Yagishita

Yohei Yagishita 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: 20200304075
    Abstract: An apparatus includes: a transistor including an input terminal for an input signal and an output terminal for an output signal; a matching circuit configured to match a load impedance regarding a fundamental harmonic of at least one of the input signal and the output signal to an impedance of the transistor and include a first conductive film being laminated over the transistor and coupled to at least one of the input terminal and the output terminal; and a processing circuit configured to adjust an impedance regarding a harmonic of at least one of the input signal and the output signal and include a second conductive film being laminated over the first conductive film and coupled to at least one of the input terminal and the output terminal through a via which penetrates through a dielectric layer sandwiched between the first conductive film and the second conductive film.
    Type: Application
    Filed: February 21, 2020
    Publication date: September 24, 2020
    Applicant: FUJITSU LIMITED
    Inventor: Yohei Yagishita
  • Patent number: 10396009
    Abstract: A heat dissipation material includes a plurality of linearly-structured objects of carbon atoms configured to include a first terminal part and a second terminal part; a first diamond-like carbon layer configured to cover the first terminal part of each of the plurality of linearly-structured objects; and a filler layer configured to be permeated between the plurality of linearly-structured objects.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: August 27, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Masaaki Norimatsu, Yukie Sakita, Shinichi Hirose, Yohei Yagishita
  • Patent number: 10274585
    Abstract: An electronic circuit includes adjustment units configured to receive a same oscillating signal having a predetermined frequency and to adjust a phase and an amplitude of the oscillating signal to produce output oscillating signals, coupling points configured to supply the output oscillating signals produced by the adjustment units to antennas, couplers provided in one-to-one correspondence with outputs of the adjustment units, equal-length lines sharing the same length and extending from the couplers, respectively, mixer circuits coupled to the equal-length lines, respectively, each of the mixer circuits being configured to receive a same reference oscillating signal having the predetermined frequency and a corresponding one of the output oscillating signals, and a control circuit configured to cause the adjustment units to adjust at least one of the phase and the amplitude in response to direct-current components in outputs of the mixer circuits.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: April 30, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Yohei Yagishita
  • Publication number: 20180158753
    Abstract: A heat dissipating structure includes a heat source; a heat dissipating part disposed to oppose to the heat source; a concave portion formed in at least one of opposing surfaces of the heat source and the heat dissipating part; and a heat conducting structure comprising a filler layer of thermoplastic material disposed between the heat source and the heat dissipating part and contacting with the opposing surfaces of the heat source and the heat dissipating part, and an assembly of carbon nanotubes that are distributed in the thermoplastic material, oriented perpendicularly to the surfaces of the filler layer, contacting, at both ends, with the opposing surfaces of the heat source and the heat dissipating part, and limited its distribution in the opposing surfaces by the concave portion.
    Type: Application
    Filed: November 29, 2017
    Publication date: June 7, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Taisuke IWAI, Daiyu KONDO, Yoshitaka YAMAGUCHI, Shinichi HIROSE, Yukie SAKITA, Yohei YAGISHITA, Masaaki NORIMATSU
  • Publication number: 20180098390
    Abstract: A detecting apparatus includes a plurality of first emitting parts two-dimensionally disposed, in a first axial direction with respect to an arrangement position at which a target object to which millimeter waves are to be emitted is arranged, to be directed to the arrangement position, the plurality of first emitting parts being configured to emit millimeter waves having a wavelength that is absorbed or reflected by a specific substance included in the target object; a first receiving part two-dimensionally disposed to face the plurality of first emitting parts across the arrangement position and to be directed to the arrangement position, the first receiving part being configured to receive the millimeter waves; and a first detecting part configured to detect a two-dimensional intensity distribution of the millimeter waves received by the first receiving part.
    Type: Application
    Filed: September 13, 2017
    Publication date: April 5, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Yohei Yagishita, Yoichi Kawano
  • Patent number: 9831490
    Abstract: A graphite material for a negative electrode of a lithium-ion secondary battery is provided. A ratio Lc(112)/Lc(006) defined as a ratio of expansion of graphene sheets to sheet displacement ranges from 0.08 to 0.11, both inclusive. A crystallite size Lc(006) calculated from a wide-angle X-ray diffraction line ranges from 30 nm to 40 nm, both inclusive. An average particle size ranges from 3 ?m to 20 ?m, both inclusive.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: November 28, 2017
    Assignee: MT Carbon Co., Ltd.
    Inventors: Yohei Yagishita, Kohei Yamaguchi, Miwa Katayama, Wataru Oda, Akemi Inami, Yoshiki Kubo, Seiji Okazaki, Akio Sakamoto
  • Publication number: 20170285143
    Abstract: An electronic circuit includes adjustment units configured to receive a same oscillating signal having a predetermined frequency and to adjust a phase and an amplitude of the oscillating signal to produce output oscillating signals, coupling points configured to supply the output oscillating signals produced by the adjustment units to antennas, couplers provided in one-to-one correspondence with outputs of the adjustment units, equal-length lines sharing the same length and extending from the couplers, respectively, mixer circuits coupled to the equal-length lines, respectively, each of the mixer circuits being configured to receive a same reference oscillating signal having the predetermined frequency and a corresponding one of the output oscillating signals, and a control circuit configured to cause the adjustment units to adjust at least one of the phase and the amplitude in response to direct-current components in outputs of the mixer circuits.
    Type: Application
    Filed: March 28, 2017
    Publication date: October 5, 2017
    Applicant: FUJITSU LIMITED
    Inventor: Yohei Yagishita
  • Publication number: 20170186664
    Abstract: A heat dissipation material includes a plurality of linearly-structured objects of carbon atoms configured to include a first terminal part and a second terminal part; a first diamond-like carbon layer configured to cover the first terminal part of each of the plurality of linearly-structured objects; and a filler layer configured to be permeated between the plurality of linearly-structured objects.
    Type: Application
    Filed: March 10, 2017
    Publication date: June 29, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Masaaki Norimatsu, Yukie Sakita, Shinichi Hirose, Yohei Yagishita
  • Patent number: 9635784
    Abstract: A heat dissipation material includes a plurality of linearly-structured objects of carbon atoms configured to include a first terminal part and a second terminal part; a first diamond-like carbon layer configured to cover the first terminal part of each of the plurality of linearly-structured objects; and a filler layer configured to be permeated between the plurality of linearly-structured objects.
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: April 25, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Masaaki Norimatsu, Yukie Sakita, Shinichi Hirose, Yohei Yagishita
  • Publication number: 20160056464
    Abstract: This amorphous carbon material is used as a material for a negative electrode of a lithium-ion secondary battery. The material has a circularity of 0.7 to 0.9, both inclusive, a mean particle size of 1 ?m to 30 ?m, both inclusive, and a total content of transition metals of 700 ppm to 2500 ppm, both inclusive.
    Type: Application
    Filed: March 20, 2014
    Publication date: February 25, 2016
    Applicant: MT Carbon Co., Ltd.
    Inventors: Yohei Yagishita, Kohei Yamaguchi, Miwa Katayama, Wataru Oda, Akemi Inami, Yoshiki Kubo, Seiji Okazaki, Akio Sakamoto
  • Patent number: 9137926
    Abstract: An electronic device includes: a semiconductor device; a heat-conductive resin, disposed above the semiconductor device, including a heat conductor and a resin; a linear carbon piece, disposed above the heat-conductive resin, to be thermally in contact with the heat conductor; and a heat spreader, disposed above the linear carbon piece, including a depressed portion having the heat-conductive resin.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: September 15, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Seiki Sakuyama, Yoshihiro Mizuno, Masaaki Norimatsu, Yukie Sakita, Koji Asano, Shinichi Hirose, Yohei Yagishita
  • Patent number: 9105600
    Abstract: A sheet structure has: a bundle structure including a plurality of linear structures made of carbon which are oriented in a predetermined direction; a covering layer covering the plurality of linear structures made of carbon; and a filling layer provided between the plurality of linear structures made of carbon covered with the covering layer. The thickness of the covering layer is not uniform in a direction crossing the predetermined direction.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: August 11, 2015
    Assignee: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Seiki Sakuyama, Yoshihiro Mizuno, Taisuke Iwai, Yukie Sakita, Masaaki Norimatsu, Koji Asano, Shinichi Hirose, Yohei Yagishita
  • Publication number: 20150147657
    Abstract: A graphite material for a negative electrode of a lithium-ion secondary battery is provided. A ratio Lc(112)/Lc(006) defined as a ratio of expansion of graphene sheets to sheet displacement ranges from 0.08 to 0.11, both inclusive. A crystallite size Lc(006) calculated from a wide-angle X-ray diffraction line ranges from 30 nm to 40 nm, both inclusive. An average particle size ranges from 3 ?m to 20 ?m, both inclusive.
    Type: Application
    Filed: June 25, 2013
    Publication date: May 28, 2015
    Inventors: Yohei Yagishita, Kohei Yamaguchi, Miwa Katayama, Wataru Oda, Akemi Inami, Yoshiki Kubo, Seiji Okazaki, Akio Sakamoto
  • Patent number: 8958207
    Abstract: The electronic device includes a heat generator 54, a heat radiator 58, and a heat radiation material 56 disposed between the heat generator 54 and the heat radiator 58 and including a plurality of linear structures 12 of carbon atoms and a filling layer 14 formed of a thermoplastic resin and disposed between the plurality of linear structures 12.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: February 17, 2015
    Assignee: Fujitsu Limited
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Shinichi Hirose, Daiyu Kondo, Ikuo Soga, Yohei Yagishita, Yukie Sakita
  • Publication number: 20140335420
    Abstract: There is provided a negative-electrode material for rechargeable batteries with a nonaqueous electrolyte which have a high charge/discharge capacity and excellent rate characteristics. The negative-electrode material for rechargeable batteries with a nonaqueous electrolyte comprises: carbon material having a carbon atom content of not less than 98.0% in terms of mass and a lattice spacing (d002) of not more than 3.370 angstroms in the C-axis direction; and a boron compound represented by general formula HxBOy wherein x represents a real number of 0 to 1.0; and y represents a real number of 1.5 to 3.0, wherein the boron compound is bonded to a portion of the carbon atoms of the carbon material.
    Type: Application
    Filed: November 20, 2012
    Publication date: November 13, 2014
    Inventors: Takehiro Yamamoto, Yohei Yagishita, Ryo Kurokawa, Jae-Seong Yeo, Jin Miyawaki, Isao Mochida, Seong-Ho Yoon
  • Patent number: 8837149
    Abstract: A method of manufacturing an electronic component includes disposing a heat radiation material including a plurality of linear structures of carbon atoms and a filling layer of a thermoplastic resin provided among the plurality of linear structures above a first substrate, disposing a blotting paper above the heat radiation material, making a heat treatment at a temperature higher than a melting temperature of the thermoplastic resin and absorbing the thermoplastic resin above the plurality of linear structures with the absorption paper, removing the blotting paper, and adhering the heat radiation material to the first substrate by cooling to solidify the thermoplastic resin.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: September 16, 2014
    Assignee: Fujitsu Limited
    Inventors: Shinichi Hirose, Taisuke Iwai, Yoshitaka Yamaguchi, Yohei Yagishita, Yukie Sakita, Masaaki Norimatsu
  • Publication number: 20140140008
    Abstract: A heat dissipation material includes a plurality of linearly-structured objects of carbon atoms configured to include a first terminal part and a second terminal part; a first diamond-like carbon layer configured to cover the first terminal part of each of the plurality of linearly-structured objects; and a filler layer configured to be permeated between the plurality of linearly-structured objects.
    Type: Application
    Filed: January 28, 2014
    Publication date: May 22, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, TAISUKE IWAI, Masaaki Norimatsu, Yukie Sakita, Shinichi Hirose, Yohei Yagishita
  • Publication number: 20130307136
    Abstract: A sheet structure has: a bundle structure including a plurality of linear structures made of carbon which are oriented in a predetermined direction; a covering layer covering the plurality of linear structures made of carbon; and a filling layer provided between the plurality of linear structures made of carbon covered with the covering layer. The thickness of the covering layer is not uniform in a direction crossing the predetermined direction.
    Type: Application
    Filed: April 10, 2013
    Publication date: November 21, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Yoshitaka YAMAGUCHI, Seiki SAKUYAMA, Yoshihiro MIZUNO, Taisuke IWAI, Yukie SAKITA, Masaaki NORIMATSU, Koji ASANO, Shinichi HIROSE, Yohei YAGISHITA
  • Publication number: 20120325454
    Abstract: A heat dissipating structure includes a heat source; a heat dissipating part disposed to oppose to the heat source; a concave portion formed in at least one of opposing surfaces of the heat source and the heat dissipating part; and a heat conducting structure comprising a filler layer of thermoplastic material disposed between the heat source and the heat dissipating part and contacting with the opposing surfaces of the heat source and the heat dissipating part, and an assembly of carbon nanotubes that are distributed in the thermoplastic material, oriented perpendicularly to the surfaces of the filler layer, contacting, at both ends, with the opposing surfaces of the heat source and the heat dissipating part, and limited its distribution in the opposing surfaces by the concave portion.
    Type: Application
    Filed: September 5, 2012
    Publication date: December 27, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Taisuke IWAI, Daiyu Kondo, Yoshitaka Yamaguchi, Shinichi Hirose, Yukie Sakita, Yohei Yagishita, Masaki Norimatsu
  • Publication number: 20120236502
    Abstract: According to an aspect of the embodiments, a sheet-shaped structure includes a bundle structure that includes a plurality of line-shaped structures of carbon atoms, a covering layer that covers the line-shaped structures in longitudinal directions of the line-shaped structures, respectively, and a filling layer that is disposed between the line-shaped structures covered with the covering layer.
    Type: Application
    Filed: February 23, 2012
    Publication date: September 20, 2012
    Applicant: FUJITSU LIMITED
    Inventors: Yoshitaka Yamaguchi, Taisuke Iwai, Masaaki Norimatsu, Shinichi Hirose, Yohei Yagishita, Yukie Sakita