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公开(公告)号：US20220108836A1
公开(公告)日：2022-04-07
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：US20220102038A1
公开(公告)日：2022-03-31
申请号：US17486258
申请日：2021-09-27
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Takashi SUZUKI , Kazuhiro EBINA , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Shinichi SATO , Seiichi NAKAGAWA , Mitsuharu KOIKE , Kazuhiro MIURA
Abstract: 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.
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公开(公告)号：US20220013278A1
公开(公告)日：2022-01-13
申请号：US17368332
申请日：2021-07-06
Applicant: TDK CORPORATION
Inventor： Yuya OSHIMA , Junichi OTSUKA , Shinichi KONDO , Yohei TADAKI , Kazuo IWAI , Masayuki SUZUKI , Emiri MATSUHASHI , Takuya NIIBORI
Abstract: A multilayer coil component includes an element body, first and second coils, and a pair of external electrodes. The element body includes a plurality of insulator layers laminated in a first direction. The element body has a pair of end surfaces opposing each other in a second direction orthogonal to the first direction. The first coil and the second coil are disposed in the element body and respectively have coil shafts along the second direction. The pair of external electrodes are disposed on the pair of end surfaces and electrically connected to both ends of the first coil and the second coil. The first coil includes a first conductor layer, a second conductor layer, and a first through hole conductor. The coil shaft of the first coil is disposed inside the second coil.
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公开(公告)号：US20190194063A1
公开(公告)日：2019-06-27
申请号：US16181715
申请日：2018-11-06
Applicant: TDK CORPORATION
Inventor： Shusaku UMEMOTO , Takashi SUZUKI , Hidekazu SATO , Masaki TAKAHASHI , Shinichi KONDO
CPC classification number: C03C10/0036 , C03C4/16 , C03C10/0054 , C03C2204/00 , H01F27/2804 , H01F27/323 , H01F41/02 , H01F2027/2809
Abstract: A glass ceramics sintered body includes a glass phase and a ceramics phase dispersed in the glass phase. The ceramics phase includes alumina grains and zirconia grains. The glass phase includes an MO—Al2O3—SiO2—B2O3 based glass, where M is an alkaline earth metal. An area ratio of the alumina grains is 13 to 30%, and an area ratio of the zirconia grains is 0.05 to 6%, on a cross section of the sintered body.
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公开(公告)号：US20170372829A1
公开(公告)日：2017-12-28
申请号：US15617401
申请日：2017-06-08
Applicant: TDK CORPORATION
Inventor： Yuusuke NAGAI , Takashi SUZUKI , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Masaki TAKAHASHI , Takashi ENDO
IPC: H01F27/255 , H01F27/28
CPC classification number: H01F27/255 , H01F5/00 , H01F17/0013 , H01F17/0033
Abstract: A multilayer coil component includes an element body including soft magnetic metal powders and a coil disposed in the element body. The coil includes a plurality of internal conductors electrically connected to each other. The plurality of internal conductors are separated from each other in a first direction and are adjacent to each other in the first direction. An average particle diameter of the soft magnetic metal powders located at an inner side of the coil when viewing from the first direction is larger than an average particle diameter of the soft magnetic metal powders located between the internal conductors adjacent to each other in the first direction.
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Patent Agency Ranking
公开(公告)号：US20160293301A1
公开(公告)日：2016-10-06
申请号：US15089992
申请日：2016-04-04
Applicant: TDK CORPORATION
Inventor： Hiroki CHOTO , Takeshi SHIBAYAMA , Takashi SUZUKI , Shinichi KONDO , Yuya OSHIMA , Masaki TAKAHASHI
CPC classification number: H01F1/344 , H01F17/0013 , H01F17/04 , H01F27/292 , H01F2017/048
Abstract: Provided is a composite ferrite composition including a magnetic substance material and a nonmagnetic substance material. The magnetic substance material is Ni—Cu—Zn based ferrite. The nonmagnetic substance material comprises a low dielectric constant nonmagnetic substance material, which is shown by a general formula: a(bZnO.cCuO).SiO2 and satisfies a=1.5 to 2.4, b=0.85 to 0.98, c=0.02 to 0.15, and b+c=1.00 in said general formula, and a bismuth oxide. A mixing ratio of the magnetic substance material and the low dielectric constant nonmagnetic substance material is 80 wt %:20 wt % to 10 wt %:90 wt %.
Abstract translation: 提供一种包含磁性物质材料和非磁性物质材料的复合铁氧体组合物。 磁性物质是Ni-Cu-Zn系铁氧体。 非磁性物质材料包括低介电常数非磁性物质材料，其通式为a（bZnO.cCuO）·SiO2，满足a = 1.5〜2.4，b = 0.85〜0.98，c = 0.02〜0.15， 所述通式中的b + c = 1.00，和氧化铋。 磁性体材料和低介电常数非磁性物质的混合比为80重量％：20重量％〜10重量％：90重量％。
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公开(公告)号：US20230317342A1
公开(公告)日：2023-10-05
申请号：US18206202
申请日：2023-06-06
Applicant: TDK CORPORATION
Inventor： Shinichi SATO , Takahiro SATO , Yusuke NAGAI , Mitsuharu KOIKE , Kazuhiro MIURA , Seiichi NAKAGAWA , Shinichi KONDO , Takashi SUZUKI
CPC classification number: H01F17/0013 , H01F1/24 , H01F2017/0066
Abstract: A multilayer coil component includes an element body including a plurality of metal magnetic particles, and a plurality of coil conductors. The plurality of coil conductors is disposed in the element body. The plurality of coil conductors is separated from each other in a predetermined direction and electrically connected to each other. The plurality of coil conductors includes one pair of side surfaces opposing each other in the predetermined direction. Surface roughness of the one pair of side surfaces is less than 40% of an average particle size of the plurality of metal magnetic particles.
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公开(公告)号：US20230223183A1
公开(公告)日：2023-07-13
申请号：US18082689
申请日：2022-12-16
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Kazuhiro EBINA , Kunihiko KAWASAKI , Shinichi KONDO , Shinichi SATO , Seiichi NAKAGAWA , Mitsuharu KOIKE , Takato SASAKI , Youhei IIDA
IPC: H01F27/29 , H01F27/255 , H01F27/28
CPC classification number: H01F27/29 , H01F27/255 , H01F27/2804 , H01F2027/2809
Abstract: 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.
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公开(公告)号：US20220102039A1
公开(公告)日：2022-03-31
申请号：US17486640
申请日：2021-09-27
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Takashi SUZUKI , Kazuhiro EBINA , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Shinichi SATO , Seiichi NAKAGAWA , Mitsuharu KOIKE , Kazuhiro MIURA
Abstract: 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 ⅓ 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.
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公开(公告)号：US20190096561A1
公开(公告)日：2019-03-28
申请号：US16136944
申请日：2018-09-20
Applicant: TDK CORPORATION
Inventor： Yusuke NAGAI , Takashi SUZUKI , Hidekazu SATO , Takashi ENDO , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Masaki TAKAHASHI
Abstract: 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.
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