公开(公告)号：US20230326669A1

公开(公告)日：2023-10-12

申请号：US18187921

申请日：2023-03-22

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki YOSHIDA ,  Takayuki ARAI

IPC: H01F27/32 ,  H01F3/08 ,  H01F27/30 ,  H01F41/02

CPC classification number: H01F27/306 ,  H01F3/08 ,  H01F27/324 ,  H01F41/0246 ,  H01F41/06

Abstract: One object is to improve the electrical insulation between a conducting wire and a dust core without forming an insulating layer such as a glass layer on the dust core. A coil component includes: a dust core including a first flange, a second flange, and a winding core, the first flange having an inside surface including a first surface and a second surface, the second flange being opposed to the inside surface of the first flange, the winding core extending in a core axis direction and connecting the first flange and the second flange, the dust core being formed of a plurality of metal magnetic particles bonded to each other via insulating material. The first surface may be less smooth than the second surface; and a conducting wire wound around the winding core so as to be in contact with the inside surface at the first surface.

公开(公告)号：US20220208445A1

公开(公告)日：2022-06-30

申请号：US17542932

申请日：2021-12-06

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kazuki YOSHIDA ,  Hitoshi MATSUURA

IPC: H01F41/02 ,  H01F27/29 ,  H01F17/04 ,  H01F17/00

Abstract: A coil component according to one or more embodiments of the invention includes a base body including a plurality of metal magnetic particles, where each metal magnetic particle contains a metal element, a coil conductor including a buried portion provided in the base body and an exposed portion externally exposed through the base body, where the coil conductor is mainly composed of copper, and an insulating oxide layer covering a surface of the buried portion, where the insulating oxide layer contains copper element and an oxide of the metal element contained in the metal magnetic particles.