公开(公告)号：US20210360839A1

公开(公告)日：2021-11-18

申请号：US16876583

申请日：2020-05-18

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Makoto ORIKASA ,  Hideharu MORO

IPC: H05K9/00

Abstract: A noise suppression sheet comprises at least one composite layer, the composite layer including: an insulating resin layer; a non-magnetic metal layer formed on the insulating resin layer; and a metal magnetic layer formed on the non-magnetic metal layer, and the composite layer has a through hole. When the noise suppression sheet comprises a plurality of composite layers, the through holes are misaligned in adjacent composite layers in the laminating direction.

公开(公告)号：US20130249662A1

公开(公告)日：2013-09-26

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: H01F27/255

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：US20210299747A1

公开(公告)日：2021-09-30

申请号：US17211304

申请日：2021-03-24

Applicant: TDK CORPORATION

Inventor： Kyotaro ABE ,  Hideharu MORO ,  Toshiaki KIKUCHI

IPC: B22F1/02 ,  H01F1/147

Abstract: The object of the present invention is to provide a fluidizing particle capable of improving a fluidity of a magnetic particle for a magnetic core and capable of improving a permeability of the magnetic core. The fluidizing particle includes a particle body having a magnetic property and a coating layer including a silicon compound covering the particle body, wherein a particle size of the fluidizing particle is 10 to 40 nm, and a circularity of the fluidizing particle is 0.55 or more.

公开(公告)号：US20190355499A1

公开(公告)日：2019-11-21

申请号：US16415722

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Hideharu MORO ,  Akihiro HARADA ,  Masahito KOEDA

IPC: H01F1/24 ,  B22F1/00 ,  H01F27/255 ,  H01F3/08

Abstract: A dust core includes large particles having an average particle size of 8-15 μm, medium particles having an average particle size of 1-5 μm, and small particles having an average particle size of 300-900 nm when a cross section thereof is observed. An area ratio occupied by the large particles is 50% to 90%, an area ratio occupied by the medium particles is 0% to 30%, and an area ratio occupied by the small particles is 5% to 30%, when a total area ratio occupied by the large particles, the medium particles and the small particles is 100% in the cross section. Vickers hardness (Hv) of the large particles, the medium particles and the small particles is 150-600 respectively. The small particles are alloy powder containing Fe and at least Si or N. The dust core may be included in an inductor element.

公开(公告)号：US20200082964A1

公开(公告)日：2020-03-12

申请号：US16494791

申请日：2018-03-30

Applicant: TDK CORPORATION

Inventor： Takeshi SAKAMOTO ,  Yoshihiro SHINKAI ,  Yu YONEZAWA ,  Hideharu MORO ,  Kensuke ARA ,  Tohru OIKAWA ,  Isao KANADA ,  Kenji HORINO ,  Kyung-Ku CHOI

IPC: H01F1/33 ,  H01F1/24 ,  H01F27/255 ,  H01F17/04 ,  H01F17/00

Abstract: A composite magnetic body with high permeability and low magnetic loss in a high-frequency region of a gigahertz band; and a high-frequency electronic component using the same, the electronic component being compact and having low-insertion loss. This composite magnetic body has a high permeability and a low magnetic loss especially in a high-frequency region of a gigahertz band, and is provided with: a plurality of magnetic nanowires 361-363 aligned so as not to cross each other; and insulators 365-367 that electrically insulate the plurality of magnetic nanowires 361-363.

公开(公告)号：US20190189319A1

公开(公告)日：2019-06-20

申请号：US16197996

申请日：2018-11-21

Applicant: TDK CORPORATION

Inventor： Hideharu MORO ,  Akihiro HARADA ,  Yu YONEZAWA

IPC: H01F1/24 ,  B22F1/00 ,  H01F27/255

CPC classification number: H01F1/24 ,  B22F1/0014 ,  B22F2301/15 ,  B22F2301/20 ,  B22F2301/35 ,  B22F2304/10 ,  H01F27/255

Abstract: To provide a dust core excellent in DC superimposition characteristics and low in eddy current loss at a high frequency band of several MHz, and an inductor element using the dust core. A dust core contains large particles and small particles of insulated soft magnetic material powder, wherein the large particles and the small particles have a saturation magnetic flux density of 1.4 T or more, and wherein in the soft magnetic material powder observed in a cross section of the dust core, a ratio of an area occupied by the large particles to an area occupied by the small particles in the cross section is 9:1 to 5:5, when a group of particles having a particle size of 3 μm or more and 15 μm or less is defined as the large particles, and a group of particles having a particle size of 300 nm or more and 900 nm or less is defined as the small particles.

公开(公告)号：US20210360840A1

公开(公告)日：2021-11-18

申请号：US16876882

申请日：2020-05-18

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Makoto ORIKASA ,  Hideharu MORO

IPC: H05K9/00

Abstract: A noise suppression sheet comprises a non-magnetic metal layer, a plurality of metal magnetic layers, and a plurality of insulating layers, and the metal magnetic layer and the insulating layer are alternately laminated on the non-magnetic metal layer. The noise suppression sheet can absorb and suppress noise generated from a circuit or the like in an electronic component by being mounted on the electronic component or the like. In the noise suppression sheet, noise is absorbed by each of the metal magnetic layers. Noise that is transmitted without being absorbed by the metal magnetic layer can be reflected by the non-magnetic metal layer and can be absorbed again by the metal magnetic layer, and hence the noise suppression sheet can suppress noise effectively.

公开(公告)号：US20210161037A1

公开(公告)日：2021-05-27

申请号：US16694032

申请日：2019-11-25

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Hideharu MORO

IPC: H05K9/00 ,  H01F1/047 ,  C22C19/03 ,  B32B15/01

Abstract: A noise suppression sheet includes a metal magnetic layer composed of a FeNi alloy containing 78 to 84 wt % of Ni, the metal magnetic layer having 2 to 8 wt % of Si added thereto. The noise suppression sheet achieves excellent magnetic shielding characteristics. In the noise suppression sheet, particularly, a high electrical resistivity of 70 to 115 μΩ·cm is achieved in the metal magnetic layer, high magnetic permeability is maintained in a high frequency band of about 1 MHz to 10 MHz, and the frequency dependence of the dielectric constant is reduced.

公开(公告)号：US20130249664A1

公开(公告)日：2013-09-26

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: H01F41/04 ,  H01F27/255

CPC classification number: H01F41/04 ,  H01F17/0013 ,  H01F27/255 ,  H01F27/292 ,  H01F41/046 ,  H01F2017/046

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.

Abstract translation: 在平面线圈元件及其制造方法中，含有扁平或针状的第一金属磁性粉末的含金属磁性粉末的树脂含有平均粒径（1μm）小于（ 32微米）的第一金属磁性粉末，这显着降低了含金属磁性粉末的树脂的粘度。 因此，当用于包围线圈单元时，含金属磁性粉末的树脂易于处理，这使得容易制造平面线圈元件。