公开(公告)号：US20240331904A1

公开(公告)日：2024-10-03

申请号：US18616465

申请日：2024-03-26

Applicant: TDK CORPORATION

Inventor： Hitoshi OHKUBO ,  Hokuto EDA ,  Masazumi ARATA ,  Miyuki ASAI ,  Takahiro HOSOKAWA ,  Yuji MATSUURA

IPC: H01F3/08 ,  H01F5/04

CPC classification number: H01F3/08 ,  H01F5/04

Abstract: Since each of an inner core, an outer core portion, and exterior portions in an element body is constituted by a magnetic body having the same material composition, internal stress is less likely to occur at the interface therebetween, and cracks due to internal stress are less likely to occur at the interface. Since a filling rate of a maximum magnetic particle having relatively high magnetic permeability is high in the inner core, the magnetic permeability of the inner core is significantly increased, and the coil characteristics of the coil component are improved.