Patents by Inventor Kunihiko Kawasaki
Kunihiko Kawasaki 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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Publication number: 20230230742Abstract: A multilayer coil component includes an element body including an end surface, a coil disposed in the element body, and an external electrode disposed on an end portion of the element body and connected to the coil. The external electrode includes a conductive resin layer. The conductive resin layer includes resin and a plurality of metal particles and is in contact with the end surface. The conductive resin layer includes a metal particle group. The metal particle group consists a plurality of first metal particles included in the plurality of metal particles, and the plurality of first metal particles is adjacent to the end surface and separated from the end surface.Type: ApplicationFiled: December 21, 2022Publication date: July 20, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Seiichi NAKAGAWA, Kosuke ITO, Keito YASUDA, Youhei IIDA
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Publication number: 20230230738Abstract: A coil component includes an element body, a coil and a first electrode part. The element body includes a main surface which is used as a mounting surface. The coil is disposed in the element body. The first electrode part is embedded in the element body and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a second surface opposing the first surface. An area of the first surface is larger than an area of the second surface when viewed from a direction orthogonal to the first surface.Type: ApplicationFiled: January 17, 2023Publication date: July 20, 2023Applicant: TDK CorporationInventors: Yusuke NAGAI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Shinichi SATO, Seiichi NAKAGAWA, Mitsuharu KOIKE, Takato SASAKI, Youhei IIDA
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Publication number: 20230230737Abstract: A multilayer coil component includes: an element body including a plurality of magnetic layers that includes soft magnetic metal particles and is laminated in a first direction; and a coil disposed in the element body. The coil includes a plurality of coil conductors electrically connected to each other. The plurality of magnetic layers includes a first magnetic layer and a second magnetic layer laminated between two coil conductors adjacent to each other in the first direction. An average particle diameter of soft magnetic metal particles included in the second magnetic layer is larger than an average particle diameter of soft magnetic metal particles included in the first magnetic layer.Type: ApplicationFiled: January 6, 2023Publication date: July 20, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Kouichi KAKUDA, Shinichi SATO, Keito YASUDA
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Publication number: 20230223183Abstract: The coil component includes an element body, a coil, a first electrode part and a second electrode part. The element body includes a main surface to be used as a mounting surface. The coil is disposed in the element body. The first electrode part and the second electrode part are spaced apart from each other in a first direction, embedded in the element body in such a way as to be exposed from the main surface, and electrically connected to the coil. The first electrode part includes a first surface exposed from the main surface and a protrusion disposed in the element body in such a way as to be spaced apart from the main surface. The protrusion protrudes more toward the second electrode part than the first surface in the first direction.Type: ApplicationFiled: December 16, 2022Publication date: July 13, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Shinichi SATO, Seiichi NAKAGAWA, Mitsuharu KOIKE, Takato SASAKI, Youhei IIDA
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Publication number: 20230215616Abstract: A coil component includes: an element body; a coil including a plurality of coil conductors disposed in the element body and electrically connected to each other; an external electrode disposed on the element body; and a connection conductor that connects the coil and the external electrode. The connection conductor has an end portion exposed from an outer surface of the element body and connected to the external electrode. The end portion has a shape extending outward over an entire circumference.Type: ApplicationFiled: December 28, 2022Publication date: July 6, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Kosuke ITO
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Publication number: 20230125854Abstract: A stacked coil component includes: an element body, a coil disposed inside the element body; and a first outer electrode and a second outer electrode which are disposed in the element body. Each of the first outer electrode and the second outer electrode includes an electrode portion which includes a joining surface joined to the element body, and a plating surface opposite to the joining surface and is formed by plating, and of which at least a part is embedded in the element body.Type: ApplicationFiled: October 20, 2022Publication date: April 27, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Takahiro SATO, Kunihiko KAWASAKI, Shinichi SATO, Seiichi NAKAGAWA, Kouichi KAKUDA, Mitsuharu KOIKE, Keito YASUDA, Takato SASAKI
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Publication number: 20230072794Abstract: A multilayer coil component includes: an element body formed by stacking a magnetic body layer containing a plurality of metal magnetic particles of a soft magnetic material; a first coil disposed in the element body and configured to include a plurality of first coil conductors; a second coil disposed in the element body and configured to include a plurality of second coil conductors; a first external electrode to which one end portion of each of the first coil and the second coil is connected; and a second external electrode to which the other end portion of each of the first coil and the second coil is connected.Type: ApplicationFiled: September 7, 2022Publication date: March 9, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Takahiro SATO, Kunihiko KAWASAKI, Shinichi SATO, Shinichi KONDO, Kouichi KAKUDA, Yuya ISHIMA, Kosuke ITO
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Publication number: 20230070168Abstract: A multilayer coil component includes: an element body; a coil disposed in the element body; and a first external electrode disposed on a surface of the element body in which the first external electrode has a first electrode layer disposed on the surface of the element body and a first plating layer and a second plating layer disposed on the first electrode layer, and the first plating layer and the second plating layer are disposed so as to be scattered in a plurality of places on an edge of the first electrode layer.Type: ApplicationFiled: September 7, 2022Publication date: March 9, 2023Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Takahiro SATO, Kunihiko KAWASAKI, Shinichi SATO, Seiichi NAKAGAWA, Kouichi KAKUDA, Yuya ISHIMA, Mitsuru ITO
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Publication number: 20220336128Abstract: A soft magnetic metal powder or the like from which a soft magnetic metal fired body can be provided has a high magnetic permeability ? and a specific resistance ? and is contained in a coil-type electronic component having sufficiently high inductance L and Q value and unlikely to be plating-extended and short-circuited. A soft magnetic metal powder contains soft magnetic metal particles containing at least Fe and Ni. Said soft magnetic metal powder further contains P, Si, Cr and/or M. M is at least one selected from among B, Co, Mn, Ti, Zr, Hf, Nb, Ta, Mo, Mg, Ca, Sr, Ba, Zn, Al, and rare earth elements. The content of each element is within a predetermined range.Type: ApplicationFiled: September 25, 2020Publication date: October 20, 2022Applicant: TDK CORPORATIONInventors: Takashi SUZUKI, Yu SAKURAI, Hideyuki ITOH, Kouichi KAKUDA, Ryuichi WADA, Nami ENOMOTO, Yusuke NAGAI, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA
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Publication number: 20220336140Abstract: A coil-type electronic component comprises an element including a magnetic element body and a coil conductor. A portion of the magnetic element body in between layers of the coil conductor adjacent to each other in an axis direction of the coil conductor includes first soft magnetic metal particles. A portion of the magnetic element body on an outer side along the axis includes second soft magnetic metal particles. The first soft magnetic metal particles have a saturation magnetization (Ms) higher than that of the second soft magnetic metal particles.Type: ApplicationFiled: April 11, 2022Publication date: October 20, 2022Applicant: TDK CORPORATIONInventors: Yu SAKURAI, Takashi SUZUKI, Hideyuki ITOH, Kouichi KAKUDA, Ryuichi WADA, Nami ENOMOTO, Yusuke NAGAI, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA
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Publication number: 20220306541Abstract: A ferrite composition comprises a main component and a subcomponent. The main component includes 32.0 to 46.4 mol % of iron oxide in terms of Fe2O3, 4.4 to 14.0 mol % of copper oxide in terms of CuO, and 8.4 to 56.9 mol % of zinc oxide in terms of ZnO. The subcomponent includes 0.53 to 11.00 parts by weight of a silicon compound in terms of SiO2, 0.1 to 12.8 parts by weight of a tin compound in terms of SnO2, and 0.5 to 7.0 parts by weight of a bismuth compound in terms of Bi2O3, with respect to 100 parts by weight of the main component.Type: ApplicationFiled: March 21, 2022Publication date: September 29, 2022Applicant: TDK CORPORATIONInventors: Kouichi KAKUDA, Takashi SUZUKI, Yukio TAKAHASHI, Kunihiko KAWASAKI, Hiroyuki TANOUE, Takehiro ISHII, Takuya NIIBORI, Takahiro SATO, Akihiko OIDE, Yasuhiro ITO, Takashi ENDO, Kunio ODA
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Publication number: 20220277879Abstract: In a multilayer coil component, first and second conductor patterns respectively have parallel parts that overlap in a lamination direction and non-parallel parts that do not overlap. The parallel parts of the first and second conductor patterns of one set are interconnected by a first through hole. The non-parallel parts of the first and second conductor patterns of sets adjacent to each other in the lamination direction are interconnected by a second through hole.Type: ApplicationFiled: February 7, 2022Publication date: September 1, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Hidekazu SATO, Kazuhiro EBINA, Kunihiko KAWASAKI, Takahiro SATO, Kouichi KAKUDA, Yuya ISHIMA, Shinichi KONDO, Shinichi SATO, Masaki TAKAHASHI
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Publication number: 20220262558Abstract: A laminated coil component capable of improving winding efficiency and characteristics and realizing a simple configuration and an improved withstand voltage is provided. A laminated coil component includes a coil portion formed inside an insulating element body forming a laminated structure and in a first conductor pattern layer and a second conductor pattern layer constituting the coil portion, positions of a pair of end portions of an outer conductor line and a pair of end portions of an inner conductor line facing each other with a division region interposed therebetween are displaced in a line direction of the coil portion passing through the division region.Type: ApplicationFiled: January 6, 2022Publication date: August 18, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Hidekazu SATO, Kunihiko KAWASAKI
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Publication number: 20220181073Abstract: In a multilayer coil component, a coil is configured by electrically connecting coil conductors respectively provided in magnetic body layers constituting an element body and metal magnetic particles have a normal particle having an ellipsoidal shape and flat particles having an ellipsoidal shape flatter in a thickness direction than the normal particle. A plurality of the normal particles and at least one of the flat particles disposed such that a surface (reference surface) including a major axis direction orthogonal to the thickness direction and a minor axis direction is along the forming surface of the coil conductor in the magnetic body layer are arranged in the lamination direction of the magnetic body layers between the coil conductors.Type: ApplicationFiled: November 10, 2021Publication date: June 9, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Kazuhiro EBINA, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Masaki TAKAHASHI, Takahiro SATO, Keito YASUDA, Shingo HATTORI
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Patent number: 11302466Abstract: A multilayer coil electronic component having improved inductance L, Q, and strength, and which has an element in which a coil conductor and a magnetic element body are stacked. The magnetic element body includes soft magnetic metal particles and a resin. The resin fills a space between the soft magnetic metal particles. Each of soft magnetic metal particles has a soft magnetic metal particle core and an oxide film covering the soft magnetic metal particle core. A layer of the oxide film contacting the soft magnetic metal particle core is made of an oxide including Si.Type: GrantFiled: November 23, 2018Date of Patent: April 12, 2022Assignee: TDK CORPORATIONInventors: Takashi Suzuki, Hidekazu Sato, Yusuke Nagai, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
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Publication number: 20220108835Abstract: A multilayer coil component includes: an element body containing a plurality of metal magnetic particles; a coil disposed in the element body; and an external electrode disposed on a surface of the element body and electrically connected to the coil. At least a part of a void part between the metal magnetic particles in the element body is filled with a first resin, the external electrode has a resin electrode containing a second resin and a conductor powder dispersed in the second resin, and the second resin connected from the resin electrode extends into the element body.Type: ApplicationFiled: September 30, 2021Publication date: April 7, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Takashi SUZUKI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Seiichi NAKAGAWA, Keito YASUDA, Ryuichi WADA
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Publication number: 20220108836Abstract: In a multilayer coil component, a part filled with a resin and a void part not filled with the resin exist between a plurality of metal magnetic particles in an element body, one main surface of the element body is a mounting surface with respect to an external electronic component, and the edge of an external electrode is positioned on the mounting surface. In the element body, a high void region where the porosity caused by the void part is higher than the porosity of the other part in the element body extends from the edge of the external electrode on the mounting surface toward an end surface of the element body.Type: ApplicationFiled: September 30, 2021Publication date: April 7, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Takashi SUZUKI, Kazuhiro EBINA, Kunihiko KAWASAKI, Shinichi KONDO, Keito YASUDA, Ryuichi WADA, Makoto MORITA, Takashi KUDO, Kyohei TONOYAMA
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Publication number: 20220102038Abstract: A multilayer coil component includes an element body containing a plurality of metal magnetic particles and a resin existing between the plurality of metal magnetic particles and a coil disposed in the element body and configured to include a plurality of electrically interconnected coil conductors. At least one of the plurality of coil conductors has a spiral shape and has conductor portions adjacent to each other when viewed from a direction along a coil axis of the coil. The conductor portion includes a straight conductor portion extending in a straight line and a connecting conductor portion connecting the straight conductor portion and constituting a corner portion of the coil conductor. The metal magnetic particles between the connecting conductor portions adjacent to each other are lower in density than the metal magnetic particles between the straight conductor portions adjacent to each other.Type: ApplicationFiled: September 27, 2021Publication date: March 31, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Takashi SUZUKI, Kazuhiro EBINA, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Shinichi SATO, Seiichi NAKAGAWA, Mitsuharu KOIKE, Kazuhiro MIURA
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Publication number: 20220102039Abstract: A multilayer coil component includes an element body containing a plurality of metal magnetic particles and a resin existing between the plurality of metal magnetic particles and a coil configured to include a plurality of electrically interconnected coil conductors. At least one of the plurality of coil conductors has a spiral shape and has conductor portions adjacent to each other when viewed from a direction along a coil axis of the coil. The plurality of metal magnetic particles contained in the element body include a plurality of metal magnetic particles having a particle diameter of ? or more and ½ or less of a distance between the conductor portions adjacent to each other in the coil conductor. The metal magnetic particles having the particle diameter are arranged along a facing direction of the conductor portions between the conductor portions adjacent to each other in the coil conductor.Type: ApplicationFiled: September 27, 2021Publication date: March 31, 2022Applicant: TDK CORPORATIONInventors: Yusuke NAGAI, Takashi SUZUKI, Kazuhiro EBINA, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Shinichi SATO, Seiichi NAKAGAWA, Mitsuharu KOIKE, Kazuhiro MIURA
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Patent number: 11211188Abstract: In a stepwise structure formed in a multilayer coil component, a difference occurs in a shrinkage amount between a maximum film thickness portion in which the number of layers is large and a minimum film thickness portion in which the number of layers is small due to portions different in the number of layers of coil parts (that is, upper coil part, lower coil part, and connecting part) adjacent to each other like the maximum film thickness portion and the minimum film thickness portion, readily causing a crack by an inner stress due to the difference in the shrinkage amount. In a multilayer coil component according to the present disclosure, a stress relaxation part overlapping with a maximum film thickness portion whose shrinkage amount is large is provided to relax inner stress in a stepwise structure, resulting in prevention of a crack.Type: GrantFiled: September 20, 2018Date of Patent: December 28, 2021Assignee: TDK CORPORATIONInventors: Yusuke Nagai, Takashi Suzuki, Hidekazu Sato, Takashi Endo, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi