公开(公告)号：US20200312501A1

公开(公告)日：2020-10-01

申请号：US16833323

申请日：2020-03-27

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Mikito SUGIYAMA ,  Mitsuru ODAHARA ,  Hideaki OOI ,  Koichi IDA

IPC: H01F1/153 ,  H01F27/255 ,  H01F1/058 ,  H01F1/24

Abstract: A magnetic material and an inductor capable of attaining both higher magnetic permeability and improved DC superposition characteristics. A composite magnetic material contains metal magnetic particles, in which the metal magnetic particles include first particles having a median diameter D50 of 1.3 μm or more and 5.0 μm or less (i.e., from 1.3 μm to 5.0 μm), and second particles having a median diameter D50 larger than the first particles. The first and second particles each include a core portion made of a metal magnetic material, and an insulating film provided on a surface of the core portion. The insulating film of the second particles has an average thickness of 40 nm or more and 100 nm or less (i.e., from 40 nm to 100 nm). The insulating film of the first particles has an average thickness smaller than that of the insulating film of the second particles.

公开(公告)号：US20180114631A1

公开(公告)日：2018-04-26

申请号：US15791457

申请日：2017-10-24

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Koichi IDA ,  Shun OZAKI ,  Hou MURAMOTO ,  Isao IDA

IPC: H01F27/32 ,  H01F27/28 ,  H01F27/255 ,  H01F41/06 ,  H01F41/12

Abstract: An electronic component includes a coil, or a coiled conductor, and a molded body including a sealant containing resin and magnetic powder, and encapsulating the coil. The coil is coated with a cured product of a thermosetting composition, and the coated body is embedded in the molded body. A method of manufacturing the electronic component includes forming a coil by winding a conductor, applying a thermosetting composition on the coil, heat treating the coil on which the composition is applied to obtain a coated body, embedding the coated body into a sealant containing resin and magnetic powder, and applying pressure to the sealant to form a molded body.

公开(公告)号：US20230207168A1

公开(公告)日：2023-06-29

申请号：US18172169

申请日：2023-02-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Mikito SUGIYAMA ,  Mitsuru ODAHARA ,  Hideaki OOI ,  Koichi IDA

IPC: H01F1/24 ,  H01F1/153 ,  H01F27/255 ,  H01F1/058 ,  B22F1/08 ,  B22F1/16 ,  B22F1/052

CPC classification number: H01F1/24 ,  B22F1/08 ,  B22F1/16 ,  B22F1/052 ,  H01F1/058 ,  H01F1/15375 ,  H01F27/255 ,  B22F1/10

Abstract: A magnetic material and an inductor capable of attaining both higher magnetic permeability and improved DC superposition characteristics. A composite magnetic material contains metal magnetic particles, in which the metal magnetic particles include first particles having a median diameter D50 of 1.3 µm or more and 5.0 µm or less (i.e., from 1.3 µm to 5.0 µm), and second particles having a median diameter D50 larger than the first particles. The first and second particles each include a core portion made of a metal magnetic material, and an insulating film provided on a surface of the core portion. The insulating film of the second particles has an average thickness of 40 nm or more and 100 nm or less (i.e., from 40 nm to 100 nm). The insulating film of the first particles has an average thickness smaller than that of the insulating film of the second particles.

公开(公告)号：US20210098163A1

公开(公告)日：2021-04-01

申请号：US17036776

申请日：2020-09-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keiichi ISHIDA ,  Koichi IDA ,  Hideaki OOI

IPC: H01F1/24 ,  H01F27/28 ,  H01F27/29 ,  H01F27/255 ,  H01F41/02

Abstract: A coil component that can maintain a high magnetic permeability and improve a DC superposition characteristic, and a method for producing a magnetic powder-containing resin material used to provide such a coil component. A coil component according includes an element body including a coil conductor and a magnetic portion. The coil conductor is formed of a wound conductor wire. The magnetic portion containing metal magnetic material grains covered with an insulating coating, a resin, and insulator grains. The coil component further includes an external electrode electrically connected to an extended portion of the coil conductor and disposed on a surface of the element body. The insulator grains have a relative permeability lower than a relative permeability of the metal magnetic material grains, and the insulator grains and the insulating coating are a compound whose main component is the same.

公开(公告)号：US20220108818A1

公开(公告)日：2022-04-07

申请号：US17494560

申请日：2021-10-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuya ISHIDA ,  Koichi IDA ,  Tarou KAWAGUCHI

IPC: H01F1/24 ,  H01F1/147 ,  H01F27/28

Abstract: A soft magnetic powder includes soft magnetic particles each having a nucleus that contains a soft magnetic metal and an insulating film on the surface of the nucleus. The insulating film contains Si and a hydrocarbon group having a C8 or longer linear-chain moiety, and the ratio by weight of Si to C in the insulating film is 7.6 or more and 42.8 or less (i.e., from 7.6 to 42.8).