公开(公告)号：US20230245812A1

公开(公告)日：2023-08-03

申请号：US18161332

申请日：2023-01-30

Applicant: TDK CORPORATION

Inventor： Naoto TSUKAMOTO ,  Sena YOSHINO ,  Tomohiko AIDA ,  Shigeki YANAGIDA ,  Masashi GOTOH ,  Hirofumi SASAKI ,  Hitoshi SASAKI

IPC: H01F27/255 ,  H01F41/02 ,  H01F27/28 ,  H01F27/30

CPC classification number: H01F27/255 ,  H01F41/0246 ,  H01F27/2823 ,  H01F27/306

Abstract: A coil device 1 comprises a coil 10, a T-shaped core 20 including a columnar portion 21 around which the coil 10 is disposed and a flange 22 formed at a first end 21a of the columnar portion 21 in an axial direction thereof, and an exterior body 30 covering the coil 10 and the columnar portion 21 and made of an exterior material including magnetic particles and a resin. The core 20 is provided with a recess 40 including at least one of a first recess 41 or a second recess 42. The first recess 41 extends between the first end 21a and a second end 21b of the columnar portion 21 in the axial direction. The second recess 42 extends from an inner side towards an outer side of the flange 22.

公开(公告)号：US20240128018A1

公开(公告)日：2024-04-18

申请号：US18484680

申请日：2023-10-11

Applicant: TDK CORPORATION

Inventor： Shigeki YANAGIDA ,  Masashi GOTOH ,  Shintarou KOIKE ,  Junichiro URABE

IPC: H01F27/32

CPC classification number: H01F27/327

Abstract: A high-frequency coil component includes a sealing portion containing a resin and a plurality of hollow particles, and a coil portion composed of a wound conductive wire. The coil portion is sealed in the sealing portion. The resin includes a low-dielectric resin having a relative permittivity εr1 of 2.00 or more and less than 3.00 at 23±2° C. A mass of the resin is represented by Mr. A total mass of the plurality of hollow particles is represented by Mp. Mr/(Mr+Mp) is 25% or more and 85% or less.

公开(公告)号：US20140097378A1

公开(公告)日：2014-04-10

申请号：US14070842

申请日：2013-11-04

Applicant: TDK CORPORATION

Inventor： Shigeki YANAGIDA ,  Takahiro MORI ,  Hiroyuki MORITA ,  Nobuhiro SUTO ,  Tatsuya KATOH ,  Yoshihiko MINACHI

IPC: H01F1/01

CPC classification number: H01F1/01 ,  C04B35/2633 ,  C04B35/2641 ,  C04B35/6261 ,  C04B35/62695 ,  C04B35/632 ,  C04B35/63408 ,  C04B35/63424 ,  C04B35/638 ,  C04B2235/32 ,  C04B2235/3201 ,  C04B2235/3203 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3277 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3284 ,  C04B2235/3286 ,  C04B2235/3287 ,  C04B2235/3293 ,  C04B2235/3294 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/3427 ,  C04B2235/5409 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/605 ,  C04B2235/6562 ,  C04B2235/6588 ,  C04B2235/767 ,  C04B2235/786 ,  C04B2235/787 ,  C04B2235/788 ,  H01F1/10 ,  H01F1/11

Abstract: A ferrite magnet and a ferrite sintered magnet including a ferrite magnetic material are provided. A main phase of the ferrite magnetic material includes a ferrite phase having a hexagonal crystal structure, and metal element composition expressed by Ca1-w-x-yR wSr xBayFezMm wherein 0.25

Abstract translation: 提供铁氧体磁铁和包括铁氧体磁性材料的铁氧体烧结磁体。 铁素体磁性材料的主相包括具有六方晶系结构的铁素体相和由Ca1-wx-yR wSr xBayFezMm表示的金属元素组成，其中0.25