公开(公告)号：US20210354426A1

公开(公告)日：2021-11-18

申请号：US16876560

申请日：2020-05-18

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Makoto ORIKASA

IPC: B32B15/01 ,  B32B7/025

Abstract: A noise suppression sheet comprises a pair of metal magnetic layers and a non-magnetic metal layer interposed between the pair of metal magnetic layers, and can achieve high magnetic shield characteristics on both surfaces.

公开(公告)号：US20200352061A1

公开(公告)日：2020-11-05

申请号：US16932046

申请日：2020-07-17

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Miyuki YANAGIDA ,  Atsushi SATO ,  Kenichi KAWABATA

IPC: H05K9/00

Abstract: A method of forming a metal magnetic film includes forming the metal magnetic film by a plating process, wherein the metal magnetic film comprises a permalloy and carbon atoms and a content of the carbon atoms is 0.3 to 3.0 at % based on a total amount of the carbon atoms and metal elements.

公开(公告)号：US20210360840A1

公开(公告)日：2021-11-18

申请号：US16876882

申请日：2020-05-18

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Makoto ORIKASA ,  Hideharu MORO

IPC: H05K9/00

Abstract: A noise suppression sheet comprises a non-magnetic metal layer, a plurality of metal magnetic layers, and a plurality of insulating layers, and the metal magnetic layer and the insulating layer are alternately laminated on the non-magnetic metal layer. The noise suppression sheet can absorb and suppress noise generated from a circuit or the like in an electronic component by being mounted on the electronic component or the like. In the noise suppression sheet, noise is absorbed by each of the metal magnetic layers. Noise that is transmitted without being absorbed by the metal magnetic layer can be reflected by the non-magnetic metal layer and can be absorbed again by the metal magnetic layer, and hence the noise suppression sheet can suppress noise effectively.

公开(公告)号：US20210161037A1

公开(公告)日：2021-05-27

申请号：US16694032

申请日：2019-11-25

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Hideharu MORO

IPC: H05K9/00 ,  H01F1/047 ,  C22C19/03 ,  B32B15/01

Abstract: A noise suppression sheet includes a metal magnetic layer composed of a FeNi alloy containing 78 to 84 wt % of Ni, the metal magnetic layer having 2 to 8 wt % of Si added thereto. The noise suppression sheet achieves excellent magnetic shielding characteristics. In the noise suppression sheet, particularly, a high electrical resistivity of 70 to 115 μΩ·cm is achieved in the metal magnetic layer, high magnetic permeability is maintained in a high frequency band of about 1 MHz to 10 MHz, and the frequency dependence of the dielectric constant is reduced.

公开(公告)号：US20210360839A1

公开(公告)日：2021-11-18

申请号：US16876583

申请日：2020-05-18

Applicant: TDK CORPORATION

Inventor： Takashi YAMADA ,  Atsushi SATO ,  Makoto ORIKASA ,  Hideharu MORO

IPC: H05K9/00

Abstract: A noise suppression sheet comprises at least one composite layer, the composite layer including: an insulating resin layer; a non-magnetic metal layer formed on the insulating resin layer; and a metal magnetic layer formed on the non-magnetic metal layer, and the composite layer has a through hole. When the noise suppression sheet comprises a plurality of composite layers, the through holes are misaligned in adjacent composite layers in the laminating direction.