公开(公告)号：US20220277879A1

公开(公告)日：2022-09-01

申请号：US17666170

申请日：2022-02-07

Applicant: TDK CORPORATION

Inventor： Yusuke NAGAI ,  Hidekazu SATO ,  Kazuhiro EBINA ,  Kunihiko KAWASAKI ,  Takahiro SATO ,  Kouichi KAKUDA ,  Yuya ISHIMA ,  Shinichi KONDO ,  Shinichi SATO ,  Masaki TAKAHASHI

IPC: H01F17/00 ,  H01F27/29

Abstract: 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.

公开(公告)号：US20170365385A1

公开(公告)日：2017-12-21

申请号：US15618493

申请日：2017-06-09

Applicant: TDK CORPORATION

Inventor： Takashi SUZUKI ,  Hidekazu SATO ,  Yuusuke NAGAI ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Masaki TAKAHASHI ,  Takashi ENDO

IPC: H01F1/147 ,  H01F27/255 ,  H01F27/28

CPC classification number: H01F1/14766 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/255 ,  H01F27/2804 ,  H01F2017/048 ,  H01F2027/2809

Abstract: A soft magnetic metal powder includes a plurality of soft magnetic metal grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %. A soft magnetic metal fired body includes soft magnetic metal fired grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %.

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

IPC: H01F1/28 ,  H01F27/28

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.

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

IPC: H01F17/00 ,  H01F27/34 ,  H01F41/04 ,  H01F17/04

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.

公开(公告)号：US20180233262A1

公开(公告)日：2018-08-16

申请号：US15895567

申请日：2018-02-13

Applicant: TDK CORPORATION

Inventor： Yuusuke NAGAI ,  Takashi SUZUKI ,  Kouichi KAKUDA ,  Kunihiko KAWASAKI ,  Shinichi KONDO ,  Yuya ISHIMA ,  Shinichi SATO ,  Masaki TAKAHASHI ,  Takashi ENDO

IPC: H01F17/00 ,  H01F27/29

Abstract: In a multilayer coil component, an end of a lower coil layer and an end of a connecting part are directly overlapped, and the end of the lower coil layer includes a contact edge positioned on a side of the connecting part and being in contact with the connecting part and a non-contact edge positioned on a side opposite to the connecting part and not being in contact with the connecting part. Then, the contact edge and the non-contact edge are not overlapped when viewed from a laminated direction. Consequently, a propagation distance of a crack becomes longer as compared with the case where an end face is parallel to the laminated direction, effectively suppressing advance of the crack. Suppressed advance of a crack in this manner makes the multilayer coil component provide a high component strength as a whole.

公开(公告)号：US20180057408A1

公开(公告)日：2018-03-01

申请号：US15678775

申请日：2017-08-16

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Ryuichi WADA ,  Yukio TAKAHASHI ,  Hiroyuki TANOUE ,  Tatsuro SUZUKI ,  Takahiro SATO ,  Takashi SUZUKI

IPC: C04B35/26 ,  H01F1/34 ,  H01F17/00 ,  H01F41/02

CPC classification number: C04B35/265 ,  C01G53/006 ,  C01P2006/40 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/5445 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F41/0246

Abstract: A ferrite composition includes a main component and an accessory component. The main component includes 43.0 to 51.0 mol % of iron oxide in terms of Fe2O3, 5.0 to 15.0 mol % of copper oxide in terms of CuO, 1.0 to 24.9 mol % of zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The accessory component includes 0.2 to 3.0 pts. wt. of silicon compound in terms of SiO2, 3.0 to 8.0 pts. wt. of cobalt compound in terms of Co3O4 (excluding 3.0 pts. wt.), and 0.2 to 8.0 pts. wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts. wt. of the main component.

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

IPC: H01F1/28 ,  H01F5/00

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.

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.

公开(公告)号：US20160293302A1

公开(公告)日：2016-10-06

申请号：US15090129

申请日：2016-04-04

Applicant: TDK CORPORATION

Inventor： Kouichi KAKUDA ,  Ryuichi WADA ,  Yukari AKITA ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Asuka MURAI ,  Hiroyuki TANOUE

IPC: H01F1/03 ,  H03H7/01 ,  H01F38/14 ,  H01F27/255 ,  H01F27/28

CPC classification number: H03H7/0115 ,  C04B35/265 ,  H01F1/344 ,  H01F17/0013 ,  H01F17/04 ,  H01F2017/0026 ,  H01F2017/048

Abstract: Provided is a ferrite composition composed of: a main component including 23.0 to 47.0 mole % of Fe compound in terms of Fe2O3, 3.0 to 16.0 mole % of Cu compound in terms of CuO, 4.0 to 39.0 mole % of Zn compound in terms of ZnO, 1.5 to 13.0 mole % of Si compound in terms of SiO2, and a residue of Ni compound; and a subcomponent including, with respect to 100 parts by weight of the main component, 0.1 to 8.0 parts by weight of Co compound in terms of Co3O4 and 0.25 to 5.00 parts by weight of Bi compound in terms of Bi2O3.

Abstract translation: 提供一种铁素体组合物，其由以下组成的铁素体组合物构成：主要成分为以Fe 2 O 3计，Fe化合物23.0〜47.0摩尔％，CuO换算为3.0〜16.0摩尔％的Cu化合物，以ZnO计为4.0〜39.0摩尔％的Zn化合物 ，1.5〜13.0摩尔％的Si化合物，以SiO 2计，残留的Ni化合物; 和相对于100重量份的主成分的副成分，以Co 3 O 4换算为0.1〜8.0重量份的Co化合物，以Bi 2 O 3换算为0.25〜5.00重量份的Bi化合物。

公开(公告)号：US20150097137A1

公开(公告)日：2015-04-09

申请号：US14507216

申请日：2014-10-06

Applicant: TDK CORPORATION

Inventor： Ryuichi WADA ,  Kouichi KAKUDA ,  Hiroki CHOTO ,  Yukari AKITA ,  Yukio TAKAHASHI ,  Masahiro ENDO ,  Takashi SUZUKI ,  Takahiro SATO ,  Akinori OHI

IPC: H01F1/01 ,  H01F27/255 ,  H01F38/14

CPC classification number: H01F1/01 ,  C04B35/26 ,  C04B35/62645 ,  C04B2235/3275 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3298 ,  C04B2235/3418 ,  C04B2235/77 ,  H01F1/344 ,  H01F3/08 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/255 ,  H01F38/14

Abstract: A ferrite composition comprises a main component and a sub component. The main component is comprised of 25.0 to 49.8 mol % iron oxide in terms of Fe2O3, 5.0 to 14.0 mol % copper oxide in terms of CuO, 0 to 40.0 mol % zinc oxide in terms of ZnO, and a remaining part of nickel oxide. The sub component includes 0.2 to 5.0 wt % silicon oxide in terms of SiO2, 0.10 to 3.00 wt % bismuth oxide in terms of Bi2O3, and 0.10 to 3.00 wt % cobalt oxide in terms of Co3O4, with respect to the main component.

Abstract translation: 铁素体组合物包括主要组分和副组分。 主成分以Fe2O3计，25.0〜49.8摩尔％的氧化铁，以CuO换算为5.0〜14.0摩尔％的氧化铜，换算成氧化锌为0〜40.0摩尔％，还有部分为氧化镍。 副成分相对于主成分，以SiO 2计，氧化铋为0.2〜5.0重量％，氧化铋为0.10〜3.00重量％，Co 3 O 4为0.10〜3.00重量％。