公开(公告)号：US20220108832A1

公开(公告)日：2022-04-07

申请号：US17472301

申请日：2021-09-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenta KONDO ,  Hiroyuki HONDA ,  Hiroshi MARUSAWA

IPC: H01F27/28 ,  H01F27/29 ,  H01F27/255

Abstract: A coil component includes a core having a winding core portion, a first flange portion disposed on a first end portion of the winding core portion, and a second flange portion disposed on a second end portion of the winding core portion; a wire winding on the winding core portion of the core; and a plate member disposed so as to bridge the first flange portion and the second flange portion. The coil component further includes an adhesive portion disposed between the first flange portion and the plate member and adhering the first flange portion to the plate member, and an adhesive portion disposed between the second flange portion and the plate member and adhering the second flange portion to the plate member. The adhesive portion contains a resin and magnetic powder.

公开(公告)号：US20250014815A1

公开(公告)日：2025-01-09

申请号：US18891392

申请日：2024-09-20

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA

IPC: H01F41/02 ,  B22F1/08 ,  B22F1/12 ,  B22F1/16 ,  B22F10/28 ,  B33Y10/00 ,  B33Y70/10 ,  H01F1/147

Abstract: A method for manufacturing a magnetic core includes a step of melting a raw material powder, comprising a soft magnetic metal powder and an agglomeration inhibitor, using laser irradiation or electron beam sweeping, and then solidifying the melt, thereby forming a three-dimensional magnetic composite.

公开(公告)号：US20190237280A1

公开(公告)日：2019-08-01

申请号：US16382241

申请日：2019-04-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA ,  Yoshiaki NOMURA ,  Hiroyuki KISHISHITA ,  Masakazu MURATA

IPC: H01H19/58 ,  H01H25/06 ,  H01H11/06 ,  G01D5/251 ,  G01D5/16

Abstract: A rotary encoder includes a shaft and an encoder mechanism that holds the shaft in a rotatably inserted state and detects a rotation direction and a rotation angle of the shaft. The encoder mechanism includes a substrate that rotatably holds the shaft, an insulator portion and a resistor portion provided on one surface of the substrate and alternately provided in the rotation direction of the shaft, a rotor attached to the shaft so as to be integrally rotatable with the shaft, and a slider that is attached to the rotor and alternately slidably contacts the insulator portion and the resistor portion by rotation of the shaft. The insulator portion includes a base material made of a resin, spherical silica, and a fluororesin filler.

公开(公告)号：US20230386725A1

公开(公告)日：2023-11-30

申请号：US18447022

申请日：2023-08-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA

IPC: H01F17/04 ,  H01F27/29 ,  H01F27/28 ,  H01F1/22

CPC classification number: H01F17/045 ,  H01F27/292 ,  H01F27/2823 ,  H01F1/22 ,  H01F2017/048

Abstract: A coil component that suppresses a decrease in adhesion in a magnetic adhesive. The coil component includes a core and a top plate. The core and the top plate are made of magnetic materials. The coil component includes a first wire and a second wire. The first wire and the second wire are wound around the core. The coil component includes an adhesive. The adhesive is interposed between the core and the top plate. The adhesive adheres the core to the top plate. The adhesive includes a thermosetting resin, a metal powder made of a soft magnetic material, and a ferrite powder.

公开(公告)号：US20130182460A1

公开(公告)日：2013-07-18

申请号：US13789486

申请日：2013-03-07

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroshi MARUSAWA ,  Akio HAGIYA

IPC: H02M7/00 ,  H01F1/01 ,  C08K3/22

CPC classification number: H01F1/01 ,  C01G49/0072 ,  C01G49/06 ,  C01G49/08 ,  C01P2002/52 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/42 ,  H01F1/344 ,  H01F1/37 ,  H01F17/045 ,  H01F17/062 ,  H01F27/02 ,  H01F41/0246 ,  H01F2003/106 ,  H01F2017/048

Abstract: This disclosure provides a magnetic material-containing resin to be used for coating and forming cores. A magnetite-containing resin of the present invention includes a magnetite having a residual magnetic flux density of less than 15 Am2/kg and a coercive force of less than 12 kA/m. A coil is provided that has a structure in which by coating a winding with the magnetite-containing resin, a magnetite-containing resin layer is formed.

Abstract translation: 本公开内容提供了用于涂覆和形成芯的含磁性材料的树脂。 本发明的含磁铁矿的树脂含有残留磁通密度小于15Am 2 / kg，矫顽力小于12kA / m的磁铁矿。 提供一种线圈，其具有通过用含有磁铁矿的树脂涂覆绕组的结构，形成含磁铁矿的树脂层。

公开(公告)号：US20220108824A1

公开(公告)日：2022-04-07

申请号：US17494629

申请日：2021-10-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Eiji ISO ,  Yuki KITASHIMA ,  Yoshiharu SATOU ,  Noriyuki OOKAWA ,  Hiroshi MARUSAWA

IPC: H01F27/02 ,  H01F27/255 ,  H01F27/28 ,  H01F41/02 ,  H01F1/12 ,  H01F27/29

Abstract: An inductor includes a body containing soft magnetic powder and resin, a coil embedded in the body, outer electrodes on the body, and a protective film on the surface of the body. The protective film has a thickness of 10 μm or more and contains silica particles and resin. In the protective film, the silica particles have an average diameter of 15 nm to 75 nm, and the percentage by weight of the silica particles to the resin is between 150% and 250%.

公开(公告)号：US20220062987A1

公开(公告)日：2022-03-03

申请号：US17367010

申请日：2021-07-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA

IPC: B22F1/00 ,  H01F1/26 ,  H01F1/34

Abstract: A method for manufacturing a magnetic powder includes a step of producing a magnetic powder by spray-drying a spray liquid containing first magnetic particles, second magnetic particles, a thermosetting resin, and an organic solvent. A magnetic powder includes first magnetic particles and a thermosetting resin coating film on surfaces of the first magnetic particles. The first magnetic particles are soft magnetic metal particles. The resin coating film contains second magnetic particles. The second magnetic particles have a smaller average particle size than the first magnetic particles.

公开(公告)号：US20220020515A1

公开(公告)日：2022-01-20

申请号：US17371889

申请日：2021-07-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA

IPC: H01F1/147 ,  H01F41/04 ,  B29D99/00 ,  C08K9/02 ,  C08K3/08 ,  C08K3/22 ,  C08K3/36 ,  C08G59/42

Abstract: A coil component is capable of suppressing permeation of liquid or gas into a magnetic portion and increasing mechanical strength of the magnetic portion. A coil component includes a magnetic portion including soft magnetic metal particles having an insulating oxide layer on a surface thereof, with the soft magnetic metal particles being bonded to each other with the insulating oxide layer interposed therebetween; and a coil portion provided inside or on the surface of the magnetic portion. A mixture containing a resin and inorganic particles is disposed between the soft magnetic metal particles.

公开(公告)号：US20160247623A1

公开(公告)日：2016-08-25

申请号：US15047141

申请日：2016-02-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroshi MARUSAWA ,  Takaomi TOI ,  Kosuke ISHIDA ,  Mizuho KATSUTA

IPC: H01F27/255 ,  H01F27/28

CPC classification number: H01F27/255 ,  H01F17/0013 ,  H01F17/04

Abstract: A common mode choke coil as an electronic component includes a laminate. The laminate includes insulating layers stacked in a thickness direction and has a recess sinking in a stacking direction of the insulating layers. The laminate includes at least one coil conductor therein. The recess is filled with a magnetic resin material. The magnetic resin material is formed of a magnetic powder-containing resin that is a mixture of a soft magnetic metal powder and a thermosetting resin. The soft magnetic metal powder has an average particle size of 12 μm or less. The magnetic powder-containing resin contains 65 vol % or more and 85 vol % or less of the soft magnetic metal powder.

Abstract translation: 作为电子部件的共模扼流线圈包括层叠体。 层叠体包括在厚度方向上堆叠的绝缘层，并且在绝缘层的堆叠方向上具有凹陷部。 该层压体包括至少一个线圈导体。 凹部填充有磁性树脂材料。 磁性树脂材料由软磁性金属粉末和热固性树脂的混合物构成的含磁性粉末的树脂形成。 软磁性金属粉末的平均粒径为12μm以下。 含磁粉的树脂含有软磁金属粉末的65体积％以上且85体积％以下。