公开(公告)号：US20210043365A1

公开(公告)日：2021-02-11

申请号：US16985948

申请日：2020-08-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki OOI ,  Naotaka HATA ,  Kuniaki WATANABE ,  Hiroaki TAKASHIMA

IPC: H01F27/29 ,  H01F27/28 ,  H01F17/04 ,  H01F41/02

Abstract: An inductor includes a coil including a winding portion and a lead-out portion, a body constituted by a magnetic member and enclosing the coil, a protection layer disposed on a surface of the body, and an outer electrode. The body has a bottom surface, a top surface, two end surfaces, two side surfaces, and first and second R-chamfered sections. The outer electrode includes first and second electrode regions. The first electrode region is located on the bottom surface and is electrically connected to the lead-out portion. The second electrode region is located on the protection layer on each end surface. The surface roughness of part of the bottom surface where the first electrode region is disposed is greater than that of the protection layer on each of the end surfaces where the second electrode region is disposed.

公开(公告)号：US20210043366A1

公开(公告)日：2021-02-11

申请号：US16986002

申请日：2020-08-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki OOI ,  Naotaka HATA ,  Kuniaki WATANABE ,  Hiroaki TAKASHIMA

IPC: H01F27/29 ,  H01F27/28 ,  H01F17/04 ,  H01F17/00 ,  H01F41/02

Abstract: An inductor includes a coil including a winding portion and a lead-out portion, a body constituted by a magnetic member and enclosing the coil, a protection layer disposed on a surface of the body, and an outer electrode. The body has a bottom surface, a top surface, two end surfaces, two side surfaces, and first and second R-chamfered sections. The outer electrode includes first and second electrode regions. The first electrode region is located on the bottom surface and is electrically connected to the lead-out portion. The second electrode region is located on the protection layer on each end surface. The radius of curvature of the first R-chamfered section in a cross section perpendicular to the bottom surface and the end surfaces is smaller than that of the second R-chamfered section in a cross section perpendicular to the end surfaces and the side surfaces.

公开(公告)号：US20210043363A1

公开(公告)日：2021-02-11

申请号：US16985862

申请日：2020-08-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki OOI ,  Naotaka HATA ,  Kuniaki WATANABE ,  Hiroaki TAKASHIMA

IPC: H01F27/29 ,  H01F27/24 ,  H01F41/06 ,  H01F41/02

Abstract: An inductor includes a coil including a winding portion and an lead-out portion, a body constituted by a magnetic member and enclosing the coil, a protection layer disposed on a surface of the body, and an outer electrode. The body has a bottom surface, a top surface, two end surfaces, two side surfaces, and first and second R-chamfered sections. The outer electrode includes first and second electrode regions. The first electrode region is located on the bottom surface and is electrically connected to the lead-out portion. The second electrode region is located on the protection layer on each end surface. The number of conductive particles in the first electrode region intersecting with a unit length of a straight line perpendicular to the bottom surface is greater than that in the second electrode region intersecting with a unit length of a straight line perpendicular to the end surface.

公开(公告)号：US20240071676A1

公开(公告)日：2024-02-29

申请号：US18366502

申请日：2023-08-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita MUNEUCHI ,  Hideaki OOI ,  Yoshiharu SATOU

IPC: H01F27/255 ,  H01F27/28 ,  H01F41/02 ,  H01F41/04

CPC classification number: H01F27/255 ,  H01F27/2823 ,  H01F41/0246 ,  H01F41/04 ,  H01F27/292

Abstract: An inductor includes a base body including a coil conductor and a core in which the coil conductor is embedded. The coil conductor includes a wound band-shaped conductive wire. The core contains soft magnetic particles and a resin. The base body is rectangular-parallelepiped-shaped and includes a pair of principal faces that are opposite to each other, a pair of end faces that are opposite to each other and adjacent to the principal faces, and a pair of side faces that are opposite to each other and adjacent to the principal faces. A base-body protection layer is on a surface of the base body. The coil conductor includes a wound section and extended sections extending from the wound section. The extended sections have surfaces exposed on the surface of the base body at respective exposed portions on each of which a metal layer that is an outer electrode is formed.

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：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：US20190221357A1

公开(公告)日：2019-07-18

申请号：US16213947

申请日：2018-12-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Mikito SUGIYAMA ,  Mitsuru ODAHARA ,  Takuya ISHIDA ,  Hideaki OOI ,  Takao KAWACHI

IPC: H01F27/28 ,  H01F27/02 ,  H01F1/12

CPC classification number: H01F27/2804 ,  H01F1/12 ,  H01F27/02

Abstract: A coil component includes a body, a coil conductor embedded in the body, and outer electrodes disposed on the outside of the body. The body includes a first magnetic layer containing a substantially spherical metallic magnetic material and second and third layers containing a substantially flat metallic magnetic material. At least the wound section of the coil conductor is between the second and third magnetic layers in the direction along the axis of the coil conductor. In the direction perpendicular to the axis, the second and third magnetic layers have a width equal to or larger than the outer diameter of the wound section of the coil component. The substantially flat metallic magnetic material is oriented so that the flat plane thereof is perpendicular to the axis of the coil conductor. The first magnetic layer extends between the second and third magnetic layers and the outer electrodes.

公开(公告)号：US20180182539A1

公开(公告)日：2018-06-28

申请号：US15844757

申请日：2017-12-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita MUNEUCHI ,  Eiji ISO ,  Hideaki OOI

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

CPC classification number: H01F27/292 ,  H01F1/26 ,  H01F17/04 ,  H01F27/255 ,  H01F27/2828 ,  H01F2017/048

Abstract: A surface-mount inductor includes a coil formed by winding a conductor, a molded body made of a sealing material containing a metal magnetic material and a resin with the coil enclosed therein, and an external terminal connected to the coil. The molded body has two parallel surfaces and has, in at least one of the surfaces, a first region having a filling factor of the metal magnetic material higher than an average filling factor of the metal magnetic material in the whole of the molded body. The external terminal is disposed on a region at least including the first region.

公开(公告)号：US20180182531A1

公开(公告)日：2018-06-28

申请号：US15842997

申请日：2017-12-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita MUNEUCHI ,  Eiji ISO ,  Hideaki OOI

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

CPC classification number: H01F27/255 ,  H01F1/26 ,  H01F17/04 ,  H01F27/2823 ,  H01F27/2828 ,  H01F27/292 ,  H01F2017/048

Abstract: A surface-mount inductor includes a coil formed by winding a conductor, a molded body made of a sealing material containing a metal magnetic material and a resin with the coil enclosed therein, and an external terminal connected to the coil. The molded body has, in a surface perpendicular to a coil axis of the coil, a first region having a filling factor of the metal magnetic material lower than an average filling factor of the metal magnetic material in the whole of the molded body. The external terminal is disposed on a region at least including the first region.