Patents by Inventor Ryoma NAKAZAWA
Ryoma NAKAZAWA 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: 11915847Abstract: A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.Type: GrantFiled: March 8, 2018Date of Patent: February 27, 2024Assignee: TDK CORPORATIONInventors: Ryoma Nakazawa, Takeshi Takahashi
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Publication number: 20230352231Abstract: A coil component including a core part and a coil part formed by winding a conductor in a coil form, in which the coil part is inside of the core part. The core part has a center pole part positioned in an area surrounded by an inner diameter of the coil part. The center pole part includes a first center pole part and a second center pole part each having different predetermined configurations, or the center pole part includes soft magnetic metal particles having predetermined deflection angles and aspect ratios.Type: ApplicationFiled: April 26, 2023Publication date: November 2, 2023Applicant: TDK CORPORATIONInventors: Katsushi YASUHARA, Yuji SEZAI, Ryoma NAKAZAWA, Hironobu FURUKAWA
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Publication number: 20230317333Abstract: A soft magnetic metal particle having a core particle and an insulation layer formed on a surface of the core particle, wherein the insulation layer includes Ti and an oxide of Si, and an amount ratio of Ti is within a range of 1.0 mol % or more and 30 mol % or less with respect to a total amount of Si and Ti in the insulation layer.Type: ApplicationFiled: March 28, 2023Publication date: October 5, 2023Applicant: TDK CorporationInventor: Ryoma NAKAZAWA
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Publication number: 20230317334Abstract: A dust core including soft magnetic metal particles and a grain boundary phase, wherein the grain boundary phase includes Si and Ti.Type: ApplicationFiled: March 30, 2023Publication date: October 5, 2023Applicant: TDK CorporationInventor: Ryoma NAKAZAWA
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Publication number: 20230047154Abstract: A soft magnetic alloy powder contains soft magnetic alloy particles. The soft magnetic alloy particles contain Fe and Si. The soft magnetic alloy particles each include crystal grains and crystal grain boundary between the crystal grains. At least one of the crystal grains has a Si segregation part.Type: ApplicationFiled: August 3, 2022Publication date: February 16, 2023Applicant: TDK CORPORATIONInventors: Katsushi YASUHARA, Ryoma NAKAZAWA, Yusuke TANIGUCHI, Hiroyuki ONO
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Patent number: 11545287Abstract: A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 ?m and 200 ?m or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.Type: GrantFiled: September 1, 2017Date of Patent: January 3, 2023Assignee: TDK CORPORATIONInventors: Ryoma Nakazawa, Yousuke Futamata, Takeshi Takahashi
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Publication number: 20220406502Abstract: A dust core includes magnetic particles, an epoxy resin, and an additive. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain. The additive includes one or more metallic elements selected from Li, Ba, Mg, and Ca.Type: ApplicationFiled: June 3, 2022Publication date: December 22, 2022Applicant: TDK CORPORATIONInventors: Ayumi TSUCHIDA, Ryoma NAKAZAWA, Junichi SHIMAMURA
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Publication number: 20220254553Abstract: A soft magnetic powder capable of maintaining high insulation resistance even after exposure to a high-temperature environment, a dust core, and an electronic component is provided with the dust core. A soft magnetic powder including soft magnetic metal particles, the surfaces of which are covered by an inorganic insulating coating, the inorganic insulating coating having a first coating part in contact with the surfaces of the soft magnetic metal particles, and a second coating part formed on the outside of the first coating part, the first coating part including phosphorus and oxygen, and the second coating part including silicon and oxygen.Type: ApplicationFiled: July 21, 2020Publication date: August 11, 2022Applicant: TDK CORPORATIONInventors: Ryoma NAKAZAWA, Hiroyuki ONO
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Patent number: 11043320Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.Type: GrantFiled: March 8, 2018Date of Patent: June 22, 2021Assignee: TDK CORPORATIONInventors: Masahiro Kamiya, Yasuhide Yamashita, Chiomi Sato, Yousuke Futamata, Ryoma Nakazawa, Takeshi Takahashi, Hiroyuki Ono
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Patent number: 11001933Abstract: A composite body has a cermet member, a metal member and an intermediate member. The cermet member includes a cermet oxide phase and a cermet metal phase. The cermet oxide phase contains a Ni-containing oxide or an Fe-containing oxide. The cermet metal phase contains Ni. The intermediate layer contains Cu. The mass proportions of Cu in the cermet metal phase at points which are spaced apart by 10, 50, 100 and 1000 ?m from the interface between the cermet member and the intermediate layer to the cermet member side are denoted by C10, C50, C100 and C1000 (mass %). When the mass proportions of Cu in the cermet oxide phase at points which are spaced apart by 10 and 100 ?m from the interface to the cermet member side are denoted by M10 and M100 (mass %), C10>C50>C100>C1000, and 5>M10?M100>?5.Type: GrantFiled: December 11, 2015Date of Patent: May 11, 2021Assignee: TDK CORPORATIONInventors: Ryoma Nakazawa, Kazuhiro Yoshidome
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Patent number: 10811176Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.Type: GrantFiled: March 7, 2018Date of Patent: October 20, 2020Assignee: TDK CORPORATIONInventors: Yousuke Futamata, Ryoma Nakazawa, Takeshi Takahashi, Junichi Shimamura
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Publication number: 20180294084Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.Type: ApplicationFiled: March 8, 2018Publication date: October 11, 2018Applicant: TDK CORPORATIONInventors: Masahiro KAMIYA, Yasuhide YAMASHITA, Chiomi SATO, Yousuke FUTAMATA, Ryoma NAKAZAWA, Takeshi TAKAHASHI, Hiroyuki ONO
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Publication number: 20180261385Abstract: A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.Type: ApplicationFiled: March 8, 2018Publication date: September 13, 2018Applicant: TDK CORPORATIONInventors: Ryoma NAKAZAWA, Takeshi TAKAHASHI
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Publication number: 20180261364Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.Type: ApplicationFiled: March 7, 2018Publication date: September 13, 2018Applicant: TDK CORPORATIONInventors: Yousuke FUTAMATA, Ryoma NAKAZAWA, Takeshi TAKAHASHI, Junichi SHIMAMURA
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Publication number: 20180148853Abstract: A composite body has a cermet member, a metal member and an intermediate member. The cermet member includes a cermet oxide phase and a cermet metal phase. The cermet oxide phase contains a Ni-containing oxide or an Fe-containing oxide. The cermet metal phase contains Ni. The intermediate layer contains Cu. The mass proportions of Cu in the cermet metal phase at points which are spaced apart by 10, 50, 100 and 1000 ?m from the interface between the cermet member and the intermediate layer to the cermet member side are denoted by C10, C50, C100 and C1000 (mass %). When the mass proportions of Cu in the cermet oxide phase at points which are spaced apart by 10 and 100 ?m from the interface to the cermet member side are denoted by M10 and M100 (mass %), C10>C50>C100>C1000, and 5>M10?M100>?5.Type: ApplicationFiled: December 11, 2015Publication date: May 31, 2018Applicant: TDK CORPORATIONInventors: Ryoma NAKAZAWA, Kazuhiro YOSHIDOME
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Publication number: 20180087167Abstract: An assembly body including a cermet member, a metal member and an intermediate member bonded to the cermet member and the metal member, wherein the cermet member includes an oxide phase and a metal phase, the intermediate member includes at least a first intermediate layer and a second intermediate layer, the first intermediate layer is bonded to the cermet member, the first intermediate layer includes at least a first metal M1, the second intermediate layer includes at least a second metal M2, a melting point of the first metal M1 is lower than the second metal M2, a weight concentration of M1 at the first intermediate layer is higher than the weight concentration of M1 at the second intermediate layer, and the weight concentration of M2 at the second intermediate layer is higher than the weight concentration of M2 at the first intermediate layer.Type: ApplicationFiled: May 26, 2015Publication date: March 29, 2018Applicants: TDK CORPORATION, RIO TINTO ALCAN INTERNATIONAL LIMITEDInventors: Kazuhiro YOSHIDOME, Ryoma NAKAZAWA
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Publication number: 20180068771Abstract: A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 ?m and 200 ?m or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.Type: ApplicationFiled: September 1, 2017Publication date: March 8, 2018Applicant: TDK CORPORATIONInventors: Ryoma NAKAZAWA, Yousuke FUTAMATA, Takeshi TAKAHASHI
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Publication number: 20180019043Abstract: A soft magnetic metal powder includes a plurality of soft magnetic metal particles composed of an Fe—Co based alloy. The Fe—Co based alloy includes 0.50 mass % or more and 8.00 mass % or less of Co and a remaining part composed of Fe and an inevitable impurity. A soft magnetic metal powder includes a plurality of soft magnetic metal particles composed of an Fe—Co based alloy. The Fe—Co based alloy includes 0.50 mass % or more and 8.00 mass % or less of Co, 0.01 mass % or more and 8.00 mass % or less of Si, and a remaining part composed of Fe and an inevitable impurity. The present invention can provide a soft magnetic metal powder or so having a favorable corrosion resistance.Type: ApplicationFiled: July 7, 2017Publication date: January 18, 2018Applicant: TDK CORPORATIONInventors: Koji MIURA, Ryoma NAKAZAWA, Katsushi YASUHARA, Tomohisa MITOSE