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).
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Patent number: 11955261Abstract: 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: GrantFiled: August 23, 2022Date of Patent: April 9, 2024Assignee: TDK CORPORATIONInventors: Kyotaro Abe, Isao Nakahata, Takuya Tsukahara
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Patent number: 11869686Abstract: 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: GrantFiled: March 24, 2021Date of Patent: January 9, 2024Assignee: TDK CORPORATIONInventors: Kyotaro Abe, Hideharu Moro, Toshiaki Kikuchi
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Publication number: 20230368959Abstract: 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: ApplicationFiled: May 11, 2023Publication date: November 16, 2023Applicant: TDK CORPORATIONInventors: Kyotaro ABE, Isao NAKAHATA
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Publication number: 20230085009Abstract: 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: ApplicationFiled: August 23, 2022Publication date: March 16, 2023Applicant: TDK CORPORATIONInventors: Kyotaro ABE, Isao NAKAHATA, Takuya TSUKAHARA
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Publication number: 20230079841Abstract: 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: ApplicationFiled: August 23, 2022Publication date: March 16, 2023Applicant: TDK CORPORATIONInventors: Kyotaro ABE, Isao NAKAHATA, Takuya TSUKAHARA
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Publication number: 20210299747Abstract: 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: ApplicationFiled: March 24, 2021Publication date: September 30, 2021Applicant: TDK CORPORATIONInventors: Kyotaro ABE, Hideharu MORO, Toshiaki KIKUCHI
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Publication number: 20210304936Abstract: 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: ApplicationFiled: March 23, 2021Publication date: September 30, 2021Applicant: TDK CORPORATIONInventors: Kyotaro ABE, Takuya TSUKAHARA, Isao NAKAHATA, Kazuhiro YOSHIDOME
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Patent number: 10763019Abstract: 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: GrantFiled: January 11, 2018Date of Patent: September 1, 2020Assignee: TDK CORPORATIONInventors: Yoshihiro Shinkai, Takashi Kamiya, Masahito Koeda, Kyotaro Abe
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Patent number: 10573442Abstract: 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: GrantFiled: January 11, 2018Date of Patent: February 25, 2020Assignee: TDK CORPORATIONInventors: Yoshihiro Shinkai, Masahito Koeda, Kyotaro Abe
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Publication number: 20200058429Abstract: 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: ApplicationFiled: August 20, 2019Publication date: February 20, 2020Inventors: Takao Suzuki, Tim Mewes, Gary Mankey, Claudia Mewes, Kyotaro Abe, Isao Kanada, Yusuke Ariake
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Publication number: 20180204657Abstract: 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: ApplicationFiled: January 11, 2018Publication date: July 19, 2018Applicant: TDK CORPORATIONInventors: Yoshihiro SHINKAI, Masahito KOEDA, Kyotaro ABE
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Publication number: 20180197666Abstract: 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: ApplicationFiled: January 11, 2018Publication date: July 12, 2018Applicant: TDK CORPORATIONInventors: Yoshihiro SHINKAI, Takashi KAMIYA, Masahito KOEDA, Kyotaro ABE
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Patent number: 9001492Abstract: 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: GrantFiled: February 14, 2012Date of Patent: April 7, 2015Assignee: TDK CorporationInventors: Ryuji Fujisawa, Mayumi Suzuki, Kyotaro Abe
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Publication number: 20120218677Abstract: 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: ApplicationFiled: February 14, 2012Publication date: August 30, 2012Applicant: TDK CORPORATIONInventors: Ryuji FUJISAWA, Mayumi SUZUKI, Kyotaro ABE
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Patent number: 7651764Abstract: 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: GrantFiled: February 6, 2007Date of Patent: January 26, 2010Assignee: TDK CorporationInventors: Kyotaro Abe, Shigeki Sato
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Patent number: 7604858Abstract: 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: GrantFiled: August 10, 2005Date of Patent: October 20, 2009Assignee: TDK CorporationInventors: Kyotaro Abe, Tamotsu Ishiyama, Shigeki Sato
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Patent number: 7394646Abstract: 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: GrantFiled: March 14, 2006Date of Patent: July 1, 2008Assignee: TDK CorporationInventors: Toru Tonogai, Tatsuya Kojima, Akinori Iwasaki, Raitaro Masaoka, Shogo Murosawa, Akira Yamaguchi, Kyotaro Abe, Tsukasa Sato
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Patent number: 7388739Abstract: 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: GrantFiled: March 17, 2004Date of Patent: June 17, 2008Assignee: TDK CorporationInventors: Kyotaro Abe, Hisashi Kobayashi, Shigeki Sato
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Patent number: 7355838Abstract: 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: GrantFiled: March 17, 2004Date of Patent: April 8, 2008Assignee: TDK CorporationInventors: Hisashi Kobayashi, Kyotaro Abe, Shigeki Sato
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Publication number: 20070190251Abstract: 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: ApplicationFiled: February 6, 2007Publication date: August 16, 2007Applicant: TDK CORPORATIONInventors: Kyotaro Abe, Shigeki Sato