公开(公告)号：US20230352231A1

公开(公告)日：2023-11-02

申请号：US18307442

申请日：2023-04-26

Applicant: TDK CORPORATION

Inventor： Katsushi YASUHARA ,  Yuji SEZAI ,  Ryoma NAKAZAWA ,  Hironobu FURUKAWA

IPC: H01F27/28 ,  H01F41/02

CPC classification number: H01F27/2823 ,  H01F41/0246 ,  H01F27/255

Abstract: A coil component including a core part and a coil part formed by winding a conductor in a coil form, in which the coil part is inside of the core part. The core part has a center pole part positioned in an area surrounded by an inner diameter of the coil part. The center pole part includes a first center pole part and a second center pole part each having different predetermined configurations, or the center pole part includes soft magnetic metal particles having predetermined deflection angles and aspect ratios.

公开(公告)号：US20180096781A1

公开(公告)日：2018-04-05

申请号：US15698163

申请日：2017-09-07

Applicant: TDK CORPORATION

Inventor： Yuji SEZAI ,  Katsushi YASUHARA

IPC: H01F27/30 ,  H01F17/02

CPC classification number: H01F27/306 ,  H01F17/02 ,  H01F17/04 ,  H01F27/28 ,  H01F27/2823 ,  H01F27/29 ,  H01F2017/048

Abstract: A coil device, in which an air-core coil of a cylindrical shape is buried in a core including a magnetic powder and a resin, showing, CV value of the below described cross sectional areas, SA1 to SA5, 0.55 or less, when an outer diameter of the air-core coil is “a1”, an inner diameter of the same is “a2”, and a distance between a surface of the core perpendicular to a direction of winding axis and an end of the air-core coil in the direction of winding axis is “h”, is provided. The coil device is superior in DC superimposing characteristic while suppressing the magnetic saturation.

公开(公告)号：US20250111982A1

公开(公告)日：2025-04-03

申请号：US18899985

申请日：2024-09-27

Applicant: TDK CORPORATION

Inventor： Katsushi YASUHARA ,  Ryoma NAKAZAWA ,  Yuji SEZAI ,  Sena YOSHINO

IPC: H01F27/255 ,  H01F27/28

Abstract: A coil component may include a core portion including a soft magnetic metal material and a winding portion including a conductor wound. The winding portion may be inside the core portion. The core portion may include a central portion and an outer portion. The central portion may be disposed in an inside diameter portion of the winding portion. The outer portion may be disposed in a portion other than the central portion. The central portion may include a first central portion and a second central portion including different materials. The second central portion may be disposed around the first central portion. H, S, and S1 may be within specific ranges, where H denotes a height of the winding portion, S denotes a sectional area of the central portion, and S1 denotes a sectional area of the first central portion.

公开(公告)号：US20180090259A1

公开(公告)日：2018-03-29

申请号：US15717404

申请日：2017-09-27

Applicant: TDK CORPORATION

Inventor： Yuji SEZAI ,  Hironobu FURUKAWA ,  Nobuo TAKAGI

IPC: H01F27/255 ,  H01F27/28 ,  H01F27/29

CPC classification number: H01F27/255 ,  H01F17/04 ,  H01F27/28 ,  H01F27/29 ,  H01F2017/048

Abstract: A coil device including: a core, including a magnetic powder and a resin; an air-core coil; a lead, led from the air-core coil; and a terminal, in which at least the entire air-core coil is buried inside the core, an outer shape of the core is a shape where at least one corner part is removed from an approximate rectangular parallelepiped shape, the removed corner includes an entire side of the approximate rectangular parallelepiped shape in the removed corner, approximately parallel to a direction of a winding axis of the air-coil, and a volume of the removed part is 2% or more of a volume of the approximate rectangular parallelepiped shape, is provided. The coil device can reduce a used amount of the magnetic body while maintaining the magnetic characteristic.

公开(公告)号：US20160079002A1

公开(公告)日：2016-03-17

申请号：US14833614

申请日：2015-08-24

Applicant: TDK CORPORATION

Inventor： Saori TAKEDA ,  Masahito FURUKAWA ,  Masanori KOSUDA ,  Yuji SEZAI

IPC: H01G4/10 ,  H01G4/33

CPC classification number: H01G4/10 ,  H01G4/1227 ,  H01G4/20 ,  H01G4/33

Abstract: A dielectric film contains as a main component a dielectric composition represented by the general formula (Ba1-xCax)z(Ti1-yZry)O3 wherein 0.001≦x≦0.400, 0.001≦y≦0.400, and 0.900≦z

Abstract translation: 电介质膜含有由通式（Ba1-xCax）z（Ti1-yZry）O3表示的电介质组合物，其中0.001和nlE; x和nlE; 0.400,0.001和n1E; y＆n1E; 0.400和0.900≤n1E; z <0.995 。 在电介质组合物的X射线衍射图中，电介质组合物的（001）面衍射峰位置2和钛之间的关系为0.00°＆lt; lE; 2＆het; c-2＆t; t <0.20° 通式和（100）平面衍射峰位置2和由通式表示的立方结构的c。

公开(公告)号：US20150274600A1

公开(公告)日：2015-10-01

申请号：US14661881

申请日：2015-03-18

Applicant: TDK CORPORATION

Inventor： Raitarou MASAOKA ,  Toshihiko KANEKO ,  Yuki YAMASHITA ,  Hiroki UCHIYAMA ,  Saori TAKEDA ,  Yuji SEZAI ,  Shirou OOTSUKI

IPC: C04B35/49 ,  C04B35/47 ,  C04B35/48

CPC classification number: C04B35/49 ,  C04B35/47 ,  C04B35/48 ,  C04B35/486 ,  C04B35/638 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/6562 ,  C04B2235/79 ,  C04B2235/80 ,  H01B3/12

Abstract: A dielectric composition contains major components that are an A-group containing major components that are at least two selected from the group consisting of Ba, Ca, and Sr and a B-group which contains a major component that is selected from Zr and Ti and which contains at least Zr. The dielectric composition contains an amorphous substance containing the A-group and the B-group and a crystalline substance containing the A-group and the B-group. In the dielectric composition, the inequality 0.5≦α≦1.5 holds, where α is the molar ratio of the A-group to the B-group.

Abstract translation: 电介质组合物包含主要成分，其为含有主要成分的主要成分，所述主成分为选自Ba，Ca和Sr中的至少两种，以及含有选自Zr和Ti的主要成分的B基，以及 其至少包含Zr。 电介质组合物含有含有A基团和B基团的无定形物质和含有A基团和B基团的结晶物质。 在电介质组成中，不等式为0.5＆nlE;α＆nlE; 1.5，其中α是A组与B基团的摩尔比。

公开(公告)号：US20150124373A1

公开(公告)日：2015-05-07

申请号：US14529623

申请日：2014-10-31

Applicant: TDK CORPORATION

Inventor： Saori TAKEDA ,  Toshihiko KANEKO ,  Yuki YAMASHITA ,  Yuji SEZAI

IPC: C04B35/453 ,  H01G4/12

CPC classification number: C04B35/453 ,  C04B35/16 ,  C04B2235/3298 ,  C04B2235/3427 ,  C04B2235/604 ,  C04B2235/6567 ,  C04B2235/80 ,  H01G4/085 ,  H01G4/1209 ,  H01G4/1272 ,  H01G4/33 ,  H01L28/55

Abstract: A dielectric composition containing a crystalline phase represented by a general formula of Bi12SiO20 and a crystalline phase represented by a general formula of Bi2SiO5 as the main components. The dielectric composition contains preferably 5 mass % to 99 mass % of the Bi2SiO5 crystalline phase, and more preferably 30 mass % to 99 mass %.

Abstract translation: 含有由通式Bi 12 SiO 20表示的结晶相和由通式Bi 2 SiO 5表示的结晶相作为主要成分的电介质组合物。 电介质组合物优选含有5质量％〜99质量％的Bi 2 SiO 5结晶相，更优选含有30质量％〜99质量％。