公开(公告)号：US20220037068A1

公开(公告)日：2022-02-03

申请号：US17502323

申请日：2021-10-15

Applicant: TDK CORPORATION

Inventor： Kyohei TONOYAMA ,  Ken SATOH ,  Kentaro SAITO ,  Miyuki ASAI ,  Hitoshi OHKUBO

IPC: H01F1/20 ,  B22F1/00 ,  B22F1/02 ,  C22C38/16 ,  C22C38/00 ,  C22C38/12 ,  H01F1/24 ,  C22C38/08

Abstract: A magnetic core includes a metal magnetic powder, which has a large size powder, an intermediate size powder, and a small size powder. A particle size of the large size powder is 10 μm or more and 60 μm or less. A particle size of the intermediate size powder is 2.0 μm or more and less than 10 μm. A particle size of the small size powder is 0.1 μm or more and less than 2.0 μm. The large size powder, the intermediate size powder, and the small size powder have an insulation coating. When A1 represents an average insulation coating thickness of the large size powder, A2 represents an average insulation coating thickness of the intermediate size powder, A3 represents an average insulation coating thickness of the small size powder, A3 is 30 nm or more and 100 nm or less, A3/A1≥1.3, and A3/A2≥1.0.

公开(公告)号：US20230119388A1

公开(公告)日：2023-04-20

申请号：US17964129

申请日：2022-10-12

Applicant: TDK CORPORATION

Inventor： Shota OTSUKA ,  Takashi KUDO ,  Kyohei TONOYAMA ,  Taiji MATSUI ,  Ken SATOH ,  Miyuki ASAI

IPC: H01F27/32 ,  H01F27/28 ,  H01F27/29 ,  H01F27/02 ,  H01F27/34

Abstract: In the coil component, the external terminal and the metal magnetic powder-containing resin constituting the element body are not in direct contact with each other, and thus high ESD resistance is obtained. That is, even when a high transient voltage is applied between the pair of external terminals, insulation breakdown is less likely to occur, and an improvement in breakdown voltage with respect to the transient voltage can be realized.