公开(公告)号：US12131862B2

公开(公告)日：2024-10-29

申请号：US17320402

申请日：2021-05-14

Applicant: TDK CORPORATION

Inventor： Kyosuke Inui ,  Makoto Morita ,  Takashi Kudo ,  Toshiyuki Anbo ,  Kyohei Tonoyama ,  Fuyuki Miura ,  Masanori Sugai ,  Eietsu Abe ,  Toru Tonogai ,  Yuichi Oyanagi

IPC: H01F27/29 ,  H01F27/28 ,  H01F41/06

CPC classification number: H01F27/29 ,  H01F27/2823 ,  H01F41/06

Abstract: An electronic component according to the present invention includes: a leadout electrode portion provided on an outer surface of an element main body; and a resin electrode layer formed at a part of the outer surface of the element main body and connected to the leadout electrode portion. The leadout electrode portion contains copper as a main component, and the resin electrode layer includes a conductor powder containing silver, and a resin. Further, a diffusion layer containing copper oxide and silver is formed at an interface between the leadout electrode portion and the resin electrode layer.

公开(公告)号：US08975997B2

公开(公告)日：2015-03-10

申请号：US13847079

申请日：2013-03-19

Applicant: TDK Corporation

Inventor： Kyohei Tonoyama ,  Makoto Morita ,  Tomokazu Ito ,  Hitoshi Ohkubo ,  Manabu Ohta ,  Yoshihiro Maeda ,  Yuuya Kaname ,  Hideharu Moro

IPC: H01F5/00 ,  H01F27/24 ,  H01F27/28 ,  H01F27/255 ,  H01F17/00 ,  H01F27/29 ,  H01F17/04

CPC classification number: H01F27/255 ,  H01F17/0013 ,  H01F27/292 ,  H01F2017/048

Abstract: In a planar coil element, the quantitative ratio of inclined particles to total particles of a first metal magnetic powder contained in a metal magnetic powder-containing resin provided in a through hole of a coil unit is higher than the quantitative ratio of inclined particles to total particles of the first metal magnetic powder contained in the metal magnetic powder-containing resin provided in other than the through hole, and many of particles of the first metal magnetic powder in the magnetic core are inclined particles whose major axes are inclined with respect to the thickness direction and the planar direction of a substrate. Therefore, the planar coil element has improved strength as compared to a planar coil element shown in FIG. 9A and has improved magnetic permeability as compared to a planar coil element shown in FIG. 9B.

Abstract translation: 在平面线圈元件中，设置在线圈单元的通孔中的含金属磁性粉末的树脂中包含的第一金属磁粉的倾斜粒子与总粒子的定量比高于倾斜粒子与总体的定量比 除了通孔以外的金属磁性粉末的树脂中含有的第一金属磁性粉末的颗粒，磁芯中的第一金属磁性粉末的许多颗粒是倾斜的，其长轴相对于 厚度方向和基板的平面方向。 因此，与图1所示的平面线圈元件相比，平面线圈元件具有改善的强度。 与图9A所示的平面线圈元件相比，磁导率提高。 9B。

公开(公告)号：US12136510B2

公开(公告)日：2024-11-05

申请号：US17230332

申请日：2021-04-14

Applicant: TDK CORPORATION

Inventor： Satoshi Sugimoto ,  Kyohei Tonoyama ,  Miyuki Asai ,  Takamasa Iwasaki

IPC: H01F27/255 ,  H01F27/28 ,  H01F27/32 ,  H01F41/02

Abstract: To provide a coil device capable of preventing a short circuit between turns of the coil part. A coil device 2 includes a core part 4 including a magnetic powder 41 and a resin 42, and a coil part 6 embedded in the core part 4 and having a wound wire 6a with an insulation coating layer 61.

公开(公告)号：US11183320B2

公开(公告)日：2021-11-23

申请号：US16663514

申请日：2019-10-25

Applicant: TDK CORPORATION

Inventor： Kyohei Tonoyama ,  Ken Satoh ,  Kentaro Saito ,  Miyuki Asai ,  Hitoshi Ohkubo

IPC: H01F1/20 ,  B22F1/00 ,  B22F1/02 ,  H01F1/24 ,  C22C38/08 ,  C22C38/16 ,  C22C38/00 ,  C22C38/12

Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 μm or more and 60 μm or less. A particle size of the intermediate size powder is 2.0 μm or more and less than 10 μm. A particle size of the small size powder is 0.1 μm or more and less than 2.0 μm. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1≥1.3, and A3/A2≥1.0.

公开(公告)号：US11657949B2

公开(公告)日：2023-05-23

申请号：US16663464

申请日：2019-10-25

Applicant: TDK CORPORATION

Inventor： Kyohei Tonoyama ,  Ken Satoh ,  Kentaro Saito ,  Miyuki Asai ,  Hitoshi Ohkubo

IPC: H01F27/28 ,  H01F27/255 ,  H01F17/00 ,  H01F17/04 ,  H01F27/29 ,  H01F27/32

CPC classification number: H01F27/255 ,  H01F17/0013 ,  H01F17/04 ,  H01F27/2804 ,  H01F27/292 ,  H01F27/324 ,  H01F2017/048 ,  H01F2027/2809

Abstract: A magnetic core and a coil component with excellent permeability, core loss, DC superimposition property, and withstand voltage. A magnetic core has a metal magnetic powder containing resin including a metal magnetic powder. The metal magnetic powder includes a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 μm or more and 60 μm or less. A particle size of the intermediate size powder is 2.0 μm or more and less than 10 μm. A particle size of the small size powder is 0.1 μm or more and less than 2.0 μm. The large size powder includes a nano crystal. A ratio of the large size powder existing with respect to the metal magnetic powder is 39% or more and 91% or less in terms of an area ratio in a cross section of the magnetic core.

公开(公告)号：US10147540B2

公开(公告)日：2018-12-04

申请号：US13848441

申请日：2013-03-21

Applicant: TDK CORPORATION

Inventor： Kyohei Tonoyama ,  Makoto Morita ,  Tomokazu Ito ,  Hitoshi Ohkubo ,  Manabu Ohta ,  Yoshihiro Maeda ,  Yuuya Kaname ,  Hideharu Moro

IPC: H01F27/255 ,  H01F17/00 ,  H01F27/28 ,  H01F41/04 ,  H01F27/29 ,  H01F17/04

Abstract: In a planar coil element and a method for producing the same, a metal magnetic powder-containing resin containing an oblate or needle-like first metal magnetic powder contains a second metal magnetic powder having an average particle size (1 μm) smaller than that (32 μm) of the first metal magnetic powder, which significantly reduces the viscosity of the metal magnetic powder-containing resin. Therefore, the metal magnetic powder-containing resin is easy to handle when applied to enclose a coil unit, which makes it easy to produce the planar coil element.

公开(公告)号：US09406420B2

公开(公告)日：2016-08-02

申请号：US14018293

申请日：2013-09-04

Applicant: TDK Corporation

Inventor： Hitoshi Ohkubo ,  Kyohei Tonoyama ,  Makoto Morita ,  Tomokazu Ito ,  Hideto Itoh ,  Yoshihiro Maeda ,  Manabu Ohta ,  Yuuya Kaname ,  Takahiro Kawahara

IPC: H01F17/00 ,  H01F1/00 ,  B32B15/00 ,  G11B5/708 ,  H01F5/00 ,  H01F1/06 ,  H01F1/26 ,  H01F27/255 ,  H01F27/28 ,  H01F27/29

CPC classification number: H01F5/00 ,  H01F1/06 ,  H01F1/26 ,  H01F27/255 ,  H01F27/2804 ,  H01F27/292 ,  H01F2017/0066 ,  H01F2027/2809

Abstract: A coil component 1 is provided with coil conductors 10a and 10b and a magnetic metal powder containing resin 22 (22a and 22b) covering the coil conductors 10a and 10b. The magnetic metal powder containing resin 22 includes first metal powder having a first average grain diameter, second metal powder having a second average grain diameter that is smaller than the first average grain diameter, and third metal powder having a third average grain diameter that is smaller than the second average grain diameter. The first average grain diameter is 15 μm or more and 100 μm or less. The third average grain diameter is 2 μm or less. The first metal powder mainly contains Permalloy and the second and third metal powders mainly contain carbonyl iron.

Abstract translation: 线圈部件1设置有线圈导体10a，10b和覆盖线圈导体10a，10b的含有树脂22（22a，22b）的磁性金属粉末。 含有磁性金属粉末的树脂22包括具有第一平均粒径的第一金属粉末，具有小于第一平均粒径的第二平均粒径的第二金属粉末和具有比第一平均粒径小的第三平均粒径的第三金属粉末 比第二平均粒径。 第一平均粒径为15μm以上且100μm以下。 第三平均粒径为2μm以下。 第一种金属粉末主要含有坡莫合金，第二和第三种金属粉末主要含有羰基铁。

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

IPC: H01F5/00 ,  H01F17/00 ,  H01F17/04 ,  H01F27/29

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.

公开(公告)号：US11680307B2

公开(公告)日：2023-06-20

申请号：US17502323

申请日：2021-10-15

Applicant: TDK CORPORATION

Inventor： Kyohei Tonoyama ,  Ken Satoh ,  Kentaro Saito ,  Miyuki Asai ,  Hitoshi Ohkubo

IPC: C22C38/12 ,  H01F1/20 ,  C22C38/16 ,  C22C38/00 ,  H01F1/24 ,  C22C38/08 ,  B22F1/05 ,  B22F1/16 ,  B22F1/052 ,  B22F1/07

CPC classification number: C22C38/12 ,  B22F1/05 ,  B22F1/052 ,  B22F1/07 ,  B22F1/16 ,  C22C38/002 ,  C22C38/005 ,  C22C38/08 ,  C22C38/16 ,  H01F1/20 ,  H01F1/24 ,  B22F2301/355 ,  B22F2304/10

Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 μm or more and 60 μm or less. A particle size of the intermediate size powder is 2.0 μm or more and less than 10 μm. A particle size of the small size powder is 0.1 μm or more and less than 2.0 μm. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1≥1.3, and A3/A2≥1.0.

公开(公告)号：US11049641B2

公开(公告)日：2021-06-29

申请号：US15363938

申请日：2016-11-29

Applicant: TDK Corporation

Inventor： Hitoshi Ohkubo ,  Kyohei Tonoyama ,  Shigeki Sato

IPC: H01F5/00 ,  H01F27/255 ,  H01F17/00 ,  H01F17/04 ,  H01F27/02 ,  H01F27/28 ,  H01F27/29 ,  H01F27/32 ,  H01F27/42

Abstract: A coil device comprising a coil, and a magnetic metal powder containing resin covering said coil. Said magnetic metal powder comprises at least two types of magnetic metal powders with different D50. The magnetic metal powder having larger D50 is defined as a large diameter powder, and the magnetic metal powder having smaller D50 is defined as a small diameter powder among the two types of said magnetic metal powder. Said large diameter powder is made of iron or iron based alloy. Said small diameter powder is made of Ni—Fe alloy. Said small diameter powder has D50 of 0.5 to 1.5 μm. Said large diameter powder and said small diameter powder respectively comprises an insulation coating layer.