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

IPC: H01F1/03 ,  H01F27/29 ,  H01F27/28

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％。

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％。

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

IPC: H01F17/00 ,  H01F1/24

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.

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：US20190221344A1

公开(公告)日：2019-07-18

申请号：US16234921

申请日：2018-12-28

Applicant: TDK CORPORATION

Inventor： Takeshi SHIBAYAMA ,  Yukio TAKAHASHI ,  Takashi SUZUKI ,  Hiroyuki TANOUE ,  Masashi SHIMOYASU ,  Masahiro KATO

IPC: H01F1/36 ,  H01F27/28 ,  H01F41/04 ,  H01F27/40 ,  C04B35/26

CPC classification number: H01F1/36 ,  C04B35/265 ,  C04B2235/3244 ,  C04B2235/3274 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/786 ,  C04B2235/96 ,  H01F27/2804 ,  H01F27/40 ,  H01F41/043 ,  H01F2027/2809

Abstract: A ferrite sintered body of the invention includes; a main component including 48.65 to 49.45 mol % of iron oxide in terms of Fe2O3, 2 to 16 mol % of copper oxide in terms of CuO, 28.00 to 33.00 mol % of zinc oxide in terms of ZnO, and a balance including nickel oxide, and a subcomponent including boron oxide in an amount of 5 to 100 ppm in terms of B2O3 with respect to 100 parts by weight of the main component, in which the ferrite sintered body includes crystal grains having an average crystal grain size of 2 to 30 μm.

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.