Patents by Inventor Kyotaro Abe

Kyotaro Abe 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).

  • Patent number: 11955261
    Abstract: A specific depth at which a concentration of Fe reaches 10 at % is 18 nm or more and 500 nm or less from the first surface, and from the first surface to the specific depth, the concentration of Fe is less than 10 at %, and a positive increase region is present in which the concentration of Fe increases with a substantially positive concentration gradient, in a case where the concentration of Fe is measured in a depth direction from a first surface of a ribbon.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: April 9, 2024
    Assignee: TDK CORPORATION
    Inventors: Kyotaro Abe, Isao Nakahata, Takuya Tsukahara
  • Patent number: 11869686
    Abstract: The object of the present invention is to provide a fluidizing particle capable of improving a fluidity of a magnetic particle for a magnetic core and capable of improving a permeability of the magnetic core. The fluidizing particle includes a particle body having a magnetic property and a coating layer including a silicon compound covering the particle body, wherein a particle size of the fluidizing particle is 10 to 40 nm, and a circularity of the fluidizing particle is 0.55 or more.
    Type: Grant
    Filed: March 24, 2021
    Date of Patent: January 9, 2024
    Assignee: TDK CORPORATION
    Inventors: Kyotaro Abe, Hideharu Moro, Toshiaki Kikuchi
  • Publication number: 20230368959
    Abstract: A magnetic core includes a first core and a second core. The first core includes a first opposing surface. The second core includes a second opposing surface. The first opposing surface and the second opposing surface are aligned so as to form at least a part of a closed magnetic circuit consisting of the first core and the second core. The first opposing surface and/or the second opposing surface has an arithmetic mean roughness Ra of 7 ?m or more and less than 65 ?m.
    Type: Application
    Filed: May 11, 2023
    Publication date: November 16, 2023
    Applicant: TDK CORPORATION
    Inventors: Kyotaro ABE, Isao NAKAHATA
  • Publication number: 20230085009
    Abstract: A specific depth at which a concentration of Fe reaches 10 at % is 18 nm or more and 500 nm or less from the first surface, and from the first surface to the specific depth, the concentration of Fe is less than 10 at %, and a positive increase region is present in which the concentration of Fe increases with a substantially positive concentration gradient, in a case where the concentration of Fe is measured in a depth direction from a first surface of a ribbon.
    Type: Application
    Filed: August 23, 2022
    Publication date: March 16, 2023
    Applicant: TDK CORPORATION
    Inventors: Kyotaro ABE, Isao NAKAHATA, Takuya TSUKAHARA
  • Publication number: 20230079841
    Abstract: Provided a soft magnetic alloy ribbon containing Fe and B. Convex portions having an average convex portion height of 7 nm to 130 nm are present on an alloy surface.
    Type: Application
    Filed: August 23, 2022
    Publication date: March 16, 2023
    Applicant: TDK CORPORATION
    Inventors: Kyotaro ABE, Isao NAKAHATA, Takuya TSUKAHARA
  • Publication number: 20210299747
    Abstract: The object of the present invention is to provide a fluidizing particle capable of improving a fluidity of a magnetic particle for a magnetic core and capable of improving a permeability of the magnetic core. The fluidizing particle includes a particle body having a magnetic property and a coating layer including a silicon compound covering the particle body, wherein a particle size of the fluidizing particle is 10 to 40 nm, and a circularity of the fluidizing particle is 0.55 or more.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Applicant: TDK CORPORATION
    Inventors: Kyotaro ABE, Hideharu MORO, Toshiaki KIKUCHI
  • Publication number: 20210304936
    Abstract: The object of the present invention is to provide an alloy ribbon capable of having excellent adhesiveness between the alloy ribbons when a plurality of the alloy ribbons is stacked; and also, to provide a magnetic core using the alloy ribbon. The present invention is an alloy ribbon comprising metals scattered on at least one surface of the alloy ribbon, in which diameters of the scattered metals are 1 ?m or more, and the scattered metals include Cu.
    Type: Application
    Filed: March 23, 2021
    Publication date: September 30, 2021
    Applicant: TDK CORPORATION
    Inventors: Kyotaro ABE, Takuya TSUKAHARA, Isao NAKAHATA, Kazuhiro YOSHIDOME
  • Patent number: 10763019
    Abstract: A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein the soft magnetic metal powder is constituted from a particle group ? and group ?, when IA is a peak intensity of the particle group ?, IB is a peak intensity of the particle group ?, and IC is a minimum intensity present between the particle group ? and group ?, then an intensity ratio IC/IA satisfies 0.10 or less and an intensity ratio IA/IB satisfies 1.2 or more and 3.0 or less, the particle group ? having a maximum peak intensity in a size distribution of the soft magnetic metal powder, the particle group ? having an peak intensity which is the second largest to the particle group ?, and a peak particle size PA of the particle group ? is larger than a peak particle size PB of the particle group ?.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: September 1, 2020
    Assignee: TDK CORPORATION
    Inventors: Yoshihiro Shinkai, Takashi Kamiya, Masahito Koeda, Kyotaro Abe
  • Patent number: 10573442
    Abstract: The object of the present invention is to provide the soft magnetic material, the core, and the inductor having high permeability and excellent DC superimposition characteristic. A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein said soft magnetic metal powder is constituted from a particle group ? and a particle group ?, when IA is a peak intensity of the particle group ?, V? is the volume of the particle group ?, IB is a peak intensity of the particle group ?, V? is the volume of the particle group ?, and IC is a minimum intensity present between the particle group ? and the particle group ?, then an intensity ratio IC/IA satisfies 0.12 or less, and a volume ratio V?/V? is 2.0 or more and 5.1 or less.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 25, 2020
    Assignee: TDK CORPORATION
    Inventors: Yoshihiro Shinkai, Masahito Koeda, Kyotaro Abe
  • Publication number: 20200058429
    Abstract: An Fe—Co—Si alloy magnetic thin film contains, in terms of atomic ratio, 20% to 25% Co and greater than 0% to 20% Si. The Fe—Co—Si alloy magnetic thin film primarily has a body-centered cubic crystal structure. Among three <100> directions of the crystal structure, one of the three <100> directions is perpendicular to a substrate surface and the other two <100> directions are parallel to the substrate surface. The Fe—Co—Si alloy magnetic thin film deposited onto MgO (100) has suitable magnetic properties, that is, a high magnetization of 1100 to 1725 emu/cc, a coercive force of less than 95 Oe, and an effective damping parameter of less than 0.001.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 20, 2020
    Inventors: Takao Suzuki, Tim Mewes, Gary Mankey, Claudia Mewes, Kyotaro Abe, Isao Kanada, Yusuke Ariake
  • Publication number: 20180204657
    Abstract: The soft magnetic material, the core, and the inductor have high permittivity and excellent DC superimposition characteristic. A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein said soft magnetic metal powder is constituted from a particle group ? and a particle group ?, when IA is a peak intensity of the particle group ?, V? is the volume of the particle group ?, IB is a peak intensity of the particle group ?, V? is the volume of the particle group ?, and IC is a minimum intensity present between the particle group ? and the particle group ?, then an intensity ratio IC/IA satisfies 0.12 or less, and a volume ratio V?/V? is 2.0 or more and 5.1 or less.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 19, 2018
    Applicant: TDK CORPORATION
    Inventors: Yoshihiro SHINKAI, Masahito KOEDA, Kyotaro ABE
  • Publication number: 20180197666
    Abstract: A soft magnetic material comprising a soft magnetic metal powder and a resin, wherein the soft magnetic metal powder is constituted from a particle group ? and group ?, when IA is a peak intensity of the particle group ?, IB is a peak intensity of the particle group ?, and IC is a minimum intensity present between the particle group ? and group ?, then an intensity ratio IC/IA satisfies 0.10 or less and an intensity ratio IA/IB satisfies 1.2 or more and 3.0 or less, the particle group ? having a maximum peak intensity in a size distribution of the soft magnetic metal powder, the particle group ? having an peak intensity which is the second largest to the particle group ?, and a peak particle size PA of the particle group ? is larger than a peak particle size PB of the particle group ?.
    Type: Application
    Filed: January 11, 2018
    Publication date: July 12, 2018
    Applicant: TDK CORPORATION
    Inventors: Yoshihiro SHINKAI, Takashi KAMIYA, Masahito KOEDA, Kyotaro ABE
  • Patent number: 9001492
    Abstract: An object of the present invention is to provide an electrode sintered body wherein shrinkage is prohibited and conductivity is good. An electrode sintered body including intermetallic compound comprising nickel and aluminum is provided. And then an internal electrode paste, which can inhibit shrinkage of an internal electrode layer, is manufactured by raising sintering temperature of conducting particle materials constituting internal electrode sheet to be internal electrode layers after firing. Further, a high-function multilayer electronic device using electrode paste for internal electrodes is manufactured.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: April 7, 2015
    Assignee: TDK Corporation
    Inventors: Ryuji Fujisawa, Mayumi Suzuki, Kyotaro Abe
  • Publication number: 20120218677
    Abstract: An object of the present invention is to provide an electrode sintered body wherein shrinkage is prohibited and conductivity is good. An electrode sintered body including intermetallic compound comprising nickel and aluminum is provided. And then an internal electrode paste, which can inhibit shrinkage of an internal electrode layer, is manufactured by raising sintering temperature of conducting particle materials constituting internal electrode sheet to be internal electrode layers after firing. Further, a high-function multilayer electronic device using electrode paste for internal electrodes is manufactured.
    Type: Application
    Filed: February 14, 2012
    Publication date: August 30, 2012
    Applicant: TDK CORPORATION
    Inventors: Ryuji FUJISAWA, Mayumi SUZUKI, Kyotaro ABE
  • Patent number: 7651764
    Abstract: A release layer paste used for producing a multilayer type electronic device and forming a release layer of a thickness of 0.05 to 0.1 ?m, used in combination with an electrode layer paste including one or more solvents selected from limonene, dihydroterpinyl methyl ether, ?-terpinyl acetate, terpinyl methyl ether, isobornyl acetate, caryophyllene, 1-dihydrocarvyl acetate, menthone, menthyl acetate, perillyl acetate, carvyl acetate, d-dihydrocarvyl acetate, and butyl carbitol acetate and a binder comprised of ethyl cellulose, including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder with respect to the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: January 26, 2010
    Assignee: TDK Corporation
    Inventors: Kyotaro Abe, Shigeki Sato
  • Patent number: 7604858
    Abstract: A release layer paste used for producing a multilayer electronic device, used in combination with an electrode layer paste including terpineol, dehydroterpineol, terpineol acetate, or dehydroterpineol acetate and including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder and the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: October 20, 2009
    Assignee: TDK Corporation
    Inventors: Kyotaro Abe, Tamotsu Ishiyama, Shigeki Sato
  • Patent number: 7394646
    Abstract: A laminated ceramic electronic component includes a ceramic substrate, an internal electrode, and a buffer layer. The ceramic substrate includes a protective layer and a functional layer. The protective layer is disposed on at least one side of the functional layer. The internal electrode is embedded in the functional layer. The buffer layer is embedded in the protective layer and has a different burning shrinkage from the ceramic substrate.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: July 1, 2008
    Assignee: TDK Corporation
    Inventors: Toru Tonogai, Tatsuya Kojima, Akinori Iwasaki, Raitaro Masaoka, Shogo Murosawa, Akira Yamaguchi, Kyotaro Abe, Tsukasa Sato
  • Patent number: 7388739
    Abstract: A green sheet coating material includes ceramic powder and a binder resin containing a butyral based resin as the main component, which furthermore includes a xylene based resin as a tackifier. The xylene based resin is included in a range of 1.0 wt % or less, more preferably 0.1 or more and 1.0 wt % or less, and particularly preferably more than 0.1 and 1.0 wt % or less with respect to 100 parts by weight of ceramic powder.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: June 17, 2008
    Assignee: TDK Corporation
    Inventors: Kyotaro Abe, Hisashi Kobayashi, Shigeki Sato
  • Patent number: 7355838
    Abstract: A green sheet coating material including ceramic powder, a binder resin including a butyral based resin as the main component, and a solvent. The solvent includes a first solvent medium having a relatively low boiling point, wherein said binder resin is easy to be dissolved, and a second solvent medium having a relatively high boiling point. The boiling point of the second solvent medium is in a range of 130 to 230° C. The second solvent medium is included by 5 to 70 wt %, and more preferably 8 to 52 wt % with respect to 100 wt % of the entire solvent.
    Type: Grant
    Filed: March 17, 2004
    Date of Patent: April 8, 2008
    Assignee: TDK Corporation
    Inventors: Hisashi Kobayashi, Kyotaro Abe, Shigeki Sato
  • Publication number: 20070190251
    Abstract: A release layer paste used for producing a multilayer type electronic device and forming a release layer of a thickness of 0.05 to 0.1 ?m, used in combination with an electrode layer paste including one or more solvents selected from limonene, dihydroterpinyl methyl ether, ?-terpinyl acetate, terpinyl methyl ether, isobornyl acetate, caryophyllene, 1-dihydrocarvyl acetate, menthone, menthyl acetate, perillyl acetate, carvyl acetate, d-dihydrocarvyl acetate, and butyl carbitol acetate and a binder comprised of ethyl cellulose, including a ceramic powder, organic vehicle, plasticizer, and dispersion agent, the organic vehicle containing a binder having polyvinyl acetal as its main ingredient, a ratio (P/B) of the ceramic powder with respect to the binder and plasticizer being controlled to 1.33 to 5.56 (however, excluding 5.56).
    Type: Application
    Filed: February 6, 2007
    Publication date: August 16, 2007
    Applicant: TDK CORPORATION
    Inventors: Kyotaro Abe, Shigeki Sato