Patents by Inventor Maki Yonetsu

Maki Yonetsu 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: 20220288726
    Abstract: According to one embodiment, when a DSC curve is measured using a differential scanning calorimeter (DSC) for a brazing material for bonding a ceramic substrate and a metal plate, the brazing material has an endothermic peak within a range of not less than 550° C. and not more than 700° C. in a heating process. The brazing material favorably includes Ag, Cu, and Ti. The brazing material favorably has not less than two of the endothermic peaks within a range of not less than 550° C. and not more than 650° C. in the heating process.
    Type: Application
    Filed: May 27, 2022
    Publication date: September 15, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Maki YONETSU, Seiichi SUENAGA, Sachiko FUJISAWA, Takashi SANO
  • Publication number: 20220295644
    Abstract: A bonded body includes a ceramic substrate and a copper plate, in which the copper plate is bonded to the ceramic substrate via a bonding layer, the copper plate includes a surface perpendicular to a direction in which the ceramic substrate and the copper plate are bonded, and a number percentage of copper crystal grains having major diameters greater than 400 ?m in three 5 mm×5 mm regions included in the surface is not less than 0% and not more than 5%. The bonding temperature is favorably not more than 800° C. The number percentage of the copper crystal grains having major diameters greater than 400 ?m is favorably not more than 1%.
    Type: Application
    Filed: May 27, 2022
    Publication date: September 15, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Maki YONETSU, Seiichi SUENAGA, Sachiko FUJISAWA, Takashi SANO
  • Patent number: 11355416
    Abstract: A structure includes: a ? silicon nitride crystal phase; and a Y2MgSi2O5N crystal phase. The structure gives a X-ray diffraction pattern by a ?-2? method, the pattern having a ratio of a peak intensity of a (22-1) plane of the Y2MgSi2O5N crystal phase to a peak intensity of a (200) plane of the ? silicon nitride crystal phase, the peak intensity of the (200) plane being determined at a position of 2?=27.0±1°, the peak intensity of the (22-1) plane being determined at a position of 2?=30.3±1°, and the ratio being 0.001 or more and 0.01 or less.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: June 7, 2022
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi Fukuda, Koichi Harada, Yasushi Hattori, Maki Yonetsu, Kenji Essaki, Keiko Albessard, Yasuhiro Goto
  • Publication number: 20210398928
    Abstract: A bonded body according to an embodiment includes a substrate, a metal member, and a bonding layer. The bonding layer is provided between the substrate and the metal member. The bonding layer includes a first particle including carbon, a first region including a metal, and a second region including titanium. The second region is provided between the first particle and the first region. A concentration of titanium in the second region is greater than a concentration of titanium in the first region.
    Type: Application
    Filed: September 2, 2021
    Publication date: December 23, 2021
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA MATERIALS CO., LTD.
    Inventors: Maki YONETSU, Seiichi SUENAGA, Sachiko FUJISAWA, Takayuki NABA
  • Publication number: 20210296205
    Abstract: A structure includes: a ? silicon nitride crystal phase; and a Y2MgSi2O5N crystal phase. The structure gives a X-ray diffraction pattern by a ?-2? method, the pattern having a ratio of a peak intensity of a (22-1) plane of the Y2MgSi2O5N crystal phase to a peak intensity of a (200) plane of the ? silicon nitride crystal phase, the peak intensity of the (200) plane being determined at a position of 2?=27.0±1°, the peak intensity of the (22-1) plane being determined at a position of 2?=30.3±1°, and the ratio being 0.001 or more and 0.01 or less.
    Type: Application
    Filed: August 31, 2020
    Publication date: September 23, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUKUDA, Koichi HARADA, Yasushi HATTORI, Maki YONETSU, Kenji ESSAKI, Keiko ALBESSARD, Yasuhiro GOTO
  • Publication number: 20210166989
    Abstract: According to one embodiment, a structure according to the embodiment includes a ? type silicon nitride type crystal phase and a Y2Si3O3N4 type crystal phase. In an X-ray diffraction pattern according to a ?-2? method of the structure, a ratio of a second peak intensity being maximum and appearing at 2?=31.93±0.1° with respect to a first peak intensity being maximum and appearing at 2?=27.03±0.1° is 0.005 or more and 0.20 or less.
    Type: Application
    Filed: February 16, 2021
    Publication date: June 3, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUKUDA, Koichi HARADA, Kenji ESSAKI, Yasushi HATTORI, Yasuhiro GOTO, Keiko ALBESSARD, Maki YONETSU
  • Publication number: 20210161007
    Abstract: A structure according to the embodiment includes a first crystal grain, a second crystal grain, and a first region. The first crystal grain includes silicon nitride. The second crystal grain includes a first element selected from a first group consisting of scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, aluminum, chromium, zirconium, magnesium, zinc, titanium, gallium, beryllium, calcium, strontium, barium, hafnium, vanadium, niobium, tantalum, tungsten, iron, cobalt, nickel, and copper, and oxygen. The first region includes an oxide of the first element.
    Type: Application
    Filed: February 5, 2021
    Publication date: May 27, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi HARADA, Yasuhiro GOTO, Kenji ESSAKI, Yasushi HATTORI, Maki YONETSU
  • Patent number: 10184674
    Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body having a first face, a second face opposite to the first face, and fine pores passing from the first face to the second face; and a soluble absorbent existing in the fine pores of the porous body.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: January 22, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kouichi Harada, Ryosuke Yagi, Hitomi Saito, Nao Kobayashi, Maki Yonetsu, Seiichi Suenaga
  • Patent number: 10173168
    Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate in the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body including a first face in contact with the first space and having a convexo-concave structure, a second face in contact with the second space, and fine pores passing to the second face from at least wall of the first face which constitutes the convexo-concave structure; and water existing in the fine pores of the porous body.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: January 8, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi Harada, Hitomi Saito, Maki Yonetsu, Seiichi Suenaga
  • Publication number: 20180272311
    Abstract: A gas separator of an embodiment includes: a honeycomb base having a plurality of through holes juxtaposed and made apart from one another by partition walls extending between a first face and a second face; and porous aggregates of inorganic material particles filled in the through holes and each having a third face and a fourth face. The porous aggregates each include pores passing from the third face to the fourth face among the inorganic material particles, and air permeability of the porous aggregates from the third faces to the fourth faces is not less than 1×10?14 m2 nor more than 1×10?11 m2.
    Type: Application
    Filed: September 15, 2017
    Publication date: September 27, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi HARADA, Maki YONETSU, Hitomi SAITO, Ryosuke RAGI, Seiichi SUENAGA
  • Publication number: 20170259205
    Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate in the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body including a first face in contact with the first space and having a convexo-concave structure, a second face in contact with the second space, and fine pores passing to the second face from at least wall of the first face which constitutes the convexo-concave structure; and water existing in the fine pores of the porous body.
    Type: Application
    Filed: September 2, 2016
    Publication date: September 14, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichi Harada, Hitomi Saito, Maki Yonetsu, Seiichi Suenaga
  • Publication number: 20170074529
    Abstract: A vapor separator in an embodiment is arranged between a first space and a second space, and is used to allow vapor existing in the first space to permeate the second space by making a vapor pressure in the second space lower than a vapor pressure in the first space. The vapor separator in the embodiment includes: a porous body having a first face, a second face opposite to the first face, and fine pores passing from the first face to the second face; and a soluble absorbent existing in the fine pores of the porous body.
    Type: Application
    Filed: August 30, 2016
    Publication date: March 16, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kouichi HARADA, Ryosuke Yagi, Hitomi Saito, Nao Kobayashi, Maki Yonetsu, Seiichi Suenaga
  • Patent number: 8986839
    Abstract: A metal-containing particle aggregate of an embodiment of the present invention includes a plurality of core-shell particles. Each of the core-shell particles includes: a core portion that contains at least one magnetic metal element selected from the first group consisting of Fe, Co, and Ni, and at least one metal element selected from the second group consisting of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare-earth elements, Ba, and Sr; and a shell layer that includes a carbon-containing material layer and an oxide layer that covers at least part of the core portion and includes at least one metal element that belongs to the second group and is contained in the core portion.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Maki Yonetsu, Tomohiro Suetsuna, Kouichi Harada, Seiichi Suenaga, Yasuyuki Hotta, Toshihide Takahashi, Tomoko Eguchi, Mutsuki Yamazaki
  • Patent number: 8988301
    Abstract: A core-shell magnetic material having an excellent characteristic in a high-frequency band, in particular a GHz-band and a high environment resistance is provided. The core-shell magnetic material includes: a magnetic member in which plural core-shell magnetic particles are bound by a binder made of a first resin; and a coating layer that is made of a second resin different from the first resin, a surface of the magnetic member being covered with the coating layer. The core-shell magnetic material is characterized in that the core-shell magnetic particle includes a magnetic metallic particle and a covering layer that covers at least part of a surface of the magnetic metallic particle, the magnetic metallic particle contains at least one magnetic metal selected from a group consisting of Fe, Co, and Ni, and the covering layer is made of an oxide, a nitride, or a carbide that contains at least one magnetic metal.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: March 24, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Maki Yonetsu, Tomohiro Suetsuna, Koichi Harada, Seiichi Suenaga, Shinji Murai, Yasuyuki Hotta, Toshihide Takahashi, Tomoko Eguchi, Noritsugu Shiokawa
  • Patent number: 8883310
    Abstract: A metal-containing particle aggregate of an embodiment of the present invention includes a plurality of core-shell particles. Each of the core-shell particles includes: a core portion that contains at least one magnetic metal element selected from the first group consisting of Fe, Co, and Ni, and at least one metal element selected from the second group consisting of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, rare-earth elements, Ba, and Sr; and a shell layer that includes a carbon-containing material layer and an oxide layer that covers at least part of the core portion and includes at least one metal element that belongs to the second group and is contained in the core portion.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: November 11, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Maki Yonetsu, Tomohiro Suetsuna, Kouichi Harada, Seiichi Suenaga, Yasuyuki Hotta, Toshihide Takahashi, Tomoko Eguchi, Mutsuki Yamazaki
  • Patent number: 8580462
    Abstract: The carbon fibers of this invention is characterized in that irreducible inorganic material particles in a mean primary particle size below 500 nm and reducible inorganic material particles in a mean primary particle size below 500 nm were mixed by pulverizing and then, the mixture was heat treated under the reducing atmosphere and metal particles in a mean particle size below 1 ?m were obtained, and the mixed powder of the thus obtained metal particles with the irreducible inorganic material particles are included in the carbon fibers.
    Type: Grant
    Filed: March 9, 2009
    Date of Patent: November 12, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Seiichi Suenaga, Maki Yonetsu, Norihiro Tomimatsu, Hideyuki Oozu, Yasuhiro Goto, Yoshihiko Nakano, Shinichi Onodera
  • Patent number: 8508423
    Abstract: The present invention provides a small antenna device realizing both miniaturization including lower profile and a broader band in a frequency band of hundreds MHz to 5 GHz and which can be mounted on a small device such as a cellular phone. An antenna device includes: a finite ground plane; a rectangular conductor plate provided above the finite ground plane, whose one side is connected to the finite ground plane, and having a bent portion substantially parallel with the one side; an antenna disposed substantially parallel with the finite ground plane above the finite ground plane, extending in a direction substantially perpendicular to the one side, and having a feeding point positioned near the other side facing the one side of the rectangular conductor plate; and a magnetic material provided in at least a part of space between the finite ground plane and the antenna.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: August 13, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Makoto Higaki, Kouichi Harada, Seiichi Suenaga, Mitsuru Ishibashi, Maki Yonetsu
  • Patent number: 8475922
    Abstract: According to one embodiment, there is provided a nanoparticle composite material, including nanoparticle aggregates in a shape having an average height of 20 nm or more and 2 ?m or less and having an average aspect ratio of 5 or more, the nanoparticle aggregates including metal nanoparticles having an average diameter of 1 nm or more and 20 nm or less and containing at least one magnetic metals selected from the group consisting of Fe, Co and Ni and binder existing between the nanoparticle aggregates.
    Type: Grant
    Filed: September 23, 2010
    Date of Patent: July 2, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Seiichi Suenaga, Tomoko Eguchi, Koichi Harada, Maki Yonetsu, Yasuyuki Hotta, Toshihide Takahashi
  • Patent number: 8305281
    Abstract: The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: November 6, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Kouichi Harada, Maki Yonetsu, Seiichi Suenaga
  • Patent number: 8289222
    Abstract: The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: October 16, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomohiro Suetsuna, Kouichi Harada, Maki Yonetsu, Seiichi Suenaga, Naoto Ito, Akihiro Tsujimura