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公开(公告)号：US12249453B2
公开(公告)日：2025-03-11
申请号：US17523202
申请日：2021-11-10
Applicant: TDK CORPORATION
Inventor： Yusuke Nagai , Kazuhiro Ebina , Kouichi Kakuda , Kunihiko Kawasaki , Shinichi Kondo , Yuya Ishima , Masaki Takahashi , Takahiro Sato , Keito Yasuda , Shingo Hattori
Abstract: 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.
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公开(公告)号：US12243675B2
公开(公告)日：2025-03-04
申请号：US17490893
申请日：2021-09-30
Applicant: TDK CORPORATION
Inventor： Yusuke Nagai , Takashi Suzuki , Kazuhiro Ebina , Kunihiko Kawasaki , Shinichi Kondo , Keito Yasuda , Ryuichi Wada , Makoto Morita , Takashi Kudo , Kyohei Tonoyama
Abstract: 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.
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公开(公告)号：US20240404740A1
公开(公告)日：2024-12-05
申请号：US18635645
申请日：2024-04-15
Applicant: TDK Corporation
Inventor： Yusuke Nagai , Takahiro Sato , Hidenobu Umeda , Takeshi Shibayama , Shinichi Sato , Yuya Ishima , Youhei Iida , Mitsuharu Koike , Keito Yasuda , Takato Sasaki
Abstract: A multilayer coil component includes an element body that contains a plurality of metal magnetic particles made of a soft magnetic material, and at least two conductors that are in contact with the element body. Surfaces of the plurality of metal magnetic particles are covered by an oxide film having an insulating property, an insulating portion having an insulating property is formed in at least a part of a surface of at least one conductor of the two conductors in the conductor, and a thickness of the insulating portion is larger than a thickness of the oxide film.
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公开(公告)号：US20240331911A1
公开(公告)日：2024-10-03
申请号：US18404288
申请日：2024-01-04
Applicant: TDK Corporation
Inventor： Yusuke Nagai , Takahiro Sato , Makoto Yoshino , Hidenobu Umeda , Masaki Takahashi , Yuya Ishima , Kosuke Ito , Keito Yasuda , Takato Sasaki , Takuya Miyashita
CPC classification number: H01F17/0013 , H01F17/0006 , H01F27/292 , H01F2017/0073
Abstract: A multilayer coil component includes an element body, a coil disposed in the element body, terminal electrodes disposed in the element body, and a first connection conductor and a second connection conductor that connect the coil and the terminal electrodes. A plurality of first pores are provided in the coil, a plurality of second pores are provided in the first connection conductor and the second connection conductor, and an area of the second pore per unit area in the first connection conductor and the second connection conductor is larger than an area of the first pore per unit area in the coil.
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