公开(公告)号：US20220375675A1

公开(公告)日：2022-11-24

申请号：US17740693

申请日：2022-05-10

Applicant: TDK CORPORATION

Inventor： Kentaro SAITO ,  Shota OTSUKA ,  Kyohei TONOYAMA ,  Tomonaga NISHIKAWA ,  Mitsuo NATORI ,  Yuuichi KAWAGUCHI ,  Junichi SHIMAMURA

IPC: H01F27/255 ,  H01F27/29

Abstract: A coil-embedded magnetic core capable of achieving improvements both in insulation and initial magnetic permeability, and coil devices thereof. The coil-embedded magnetic core embedding a coil made of a conductor, including magnetic powder and a resin, in which the coil-embedded magnetic core further includes a modifier.

公开(公告)号：US20220406501A1

公开(公告)日：2022-12-22

申请号：US17831665

申请日：2022-06-03

Applicant: TDK CORPORATION

Inventor： Yusuke TANIGUCHI ,  Junichi SEKI ,  Junichi SHIMAMURA

IPC: H01F1/28 ,  C08G59/24 ,  C08K9/02

Abstract: A dust core includes a binder and magnetic particles. The binder includes an epoxy resin. The magnetic particles are dispersed in the binder. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain.

公开(公告)号：US20180261364A1

公开(公告)日：2018-09-13

申请号：US15913964

申请日：2018-03-07

Applicant: TDK CORPORATION

Inventor： Yousuke FUTAMATA ,  Ryoma NAKAZAWA ,  Takeshi TAKAHASHI ,  Junichi SHIMAMURA

IPC: H01F1/147 ,  H01F3/00

Abstract: A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe—Si—O based oxide. The insulation film includes a Si—O based oxide.

公开(公告)号：US20220406502A1

公开(公告)日：2022-12-22

申请号：US17831729

申请日：2022-06-03

Applicant: TDK CORPORATION

Inventor： Ayumi TSUCHIDA ,  Ryoma NAKAZAWA ,  Junichi SHIMAMURA

IPC: H01F1/28 ,  H01F3/08

Abstract: A dust core includes magnetic particles, an epoxy resin, and an additive. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain. The additive includes one or more metallic elements selected from Li, Ba, Mg, and Ca.