公开(公告)号：US20180090268A1

公开(公告)日：2018-03-29

申请号：US15711341

申请日：2017-09-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yutaka NOGUCHI ,  Takeshi KOBAYASHI ,  Makoto YAMAMOTO

IPC: H01F41/04 ,  H01F17/04 ,  H01F27/29 ,  H01F17/00 ,  H01F1/33

Abstract: A method of manufacturing a laminated electronic component having a circuit element formed in an element body. The method includes forming a collective laminated body including a plurality of element bodies having circuit elements formed therein by laminating pluralities of insulator layers and conductor patterns; forming a plurality of external terminals on one of surfaces of the collective laminated body orthogonal to a lamination direction; forming a disappearing layer covering the external terminals and caused to disappear by heat treatment; cutting and dividing the collective laminated body having the disappearing layer formed thereon along the lamination direction into each of element bodies; applying an insulator precursor to a surface of the element body; and forming a laminated electronic component by applying a heat treatment to the element body to which the insulator precursor is applied. In the method, the insulator layers can be replaced by magnetic material layers.

公开(公告)号：US20240191328A1

公开(公告)日：2024-06-13

申请号：US18583595

申请日：2024-02-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: C22C38/02 ,  B22F1/107 ,  B22F1/145 ,  B22F1/16 ,  B22F3/02 ,  H01F1/147 ,  H01F1/24 ,  H01F27/255

CPC classification number: C22C38/02 ,  B22F1/145 ,  B22F1/16 ,  B22F3/02 ,  H01F1/14766 ,  H01F1/24 ,  B22F1/107 ,  B22F2301/35 ,  B22F2302/256 ,  C22C2202/02 ,  H01F27/255 ,  Y10T428/12181

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, a third oxide layer, and a fourth oxide layer. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Fe content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, the third oxide layer is a layer where Si content takes a local maximum value, and the fourth oxide layer is a layer where Fe content takes a local maximum value.

公开(公告)号：US20210313100A1

公开(公告)日：2021-10-07

申请号：US17201871

申请日：2021-03-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F1/147 ,  B22F1/02 ,  B22F3/02 ,  C22C38/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, a third oxide layer, and a fourth oxide layer. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Fe content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, the third oxide layer is a layer where Si content takes a local maximum value, and the fourth oxide layer is a layer where Fe content takes a local maximum value.

公开(公告)号：US20240304367A1

公开(公告)日：2024-09-12

申请号：US18665172

申请日：2024-05-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Makoto YAMAMOTO ,  Masayuki OISHI

IPC: H01F1/36 ,  H01F5/04

CPC classification number: H01F1/36 ,  H01F5/04

Abstract: A multilayer coil component includes a multilayer body composed of a plurality of laminated insulating layers; a coil composed of a plurality of coil conductors laminated together with the insulating layers, embedded in the multilayer body, and electrically connected; and outer electrodes provided on an outer surface of the multilayer body and electrically connected to the coil. An inorganic material layer is provided in at least part of the interfaces between the insulating layers and the coil conductors. The inorganic material layer includes an inorganic material and a metal material different from the inorganic material. In the inorganic material layer, the metal material is present between particles of the inorganic material or in/between porous bodies made of the inorganic material.

公开(公告)号：US20210174997A1

公开(公告)日：2021-06-10

申请号：US17178160

申请日：2021-02-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yutaka NOGUCHI ,  Takeshi KOBAYASHI ,  Makoto YAMAMOTO

IPC: H01F17/00 ,  H01L23/522 ,  H01F17/04 ,  H01F27/29 ,  H05K3/46

Abstract: A laminated electronic component having a coil formed in the laminated body of pluralities of laminated magnetic material layers and conductor patterns by electrically connecting the conductor patterns adjacent to each other via the magnetic material layers. The magnetic material layers contain a metal magnetic material. The coil has a first end portion close to a bottom surface of the laminated body and a second end portion distant from the bottom surface of the laminated body. The first end portion is electrically connected to a first external terminal disposed on the bottom surface of the laminated body. The second end portion is electrically connected to a second external terminal disposed on the bottom surface of the laminated body via an electrode disposed on a side surface of the laminated body. The electrode is covered with an insulator film.

公开(公告)号：US20180090255A1

公开(公告)日：2018-03-29

申请号：US15711366

申请日：2017-09-21

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yutaka NOGUCHI ,  Takeshi KOBAYASHI ,  Makoto YAMAMOTO

IPC: H01F17/00 ,  H01F17/04 ,  H01F27/29

CPC classification number: H01F17/0013 ,  H01F17/0033 ,  H01F17/04 ,  H01F27/29 ,  H01F27/292 ,  H01F27/324 ,  H01F2017/004 ,  H01F2017/0066 ,  H05K3/4629

Abstract: A laminated electronic component having a coil formed in a laminated body of pluralities of laminated magnetic material layers and conductor patterns by electrically connecting the conductor patterns adjacent to each other via the magnetic material layers. The magnetic material layers contain a metal magnetic material. The coil has a first end portion close to a bottom surface of the laminated body and a second end portion distant from the bottom surface of the laminated body. The first end portion is electrically connected to a first external terminal disposed on the bottom surface of the laminated body. The second end portion is electrically connected to a second external terminal disposed on the bottom surface of the laminated body via a conductor extending in a lamination direction of the laminated body. An insulator part is disposed between the conductor and the coil.

公开(公告)号：US20180012688A1

公开(公告)日：2018-01-11

申请号：US15712359

申请日：2017-09-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yutaka NOGUCHI ,  Makoto YAMAMOTO ,  Takeshi KOBAYASHI

IPC: H01F5/00 ,  H01F37/00

CPC classification number: H01F5/003 ,  H01F17/0013 ,  H01F17/0033 ,  H01F27/292 ,  H01F37/00 ,  H01F41/046 ,  H01F2017/0066

Abstract: A laminated electronic component in which magnetic body layers and conductor patterns are laminated, and the conductor patterns between the magnetic body layers are connected to form a coil within a laminated body. The magnetic body layers are formed from a metal magnetic body. At least one lead-out conductor pattern of the coil is connected with an external terminal formed on an undersurface of the laminated body through a conductor formed at a corner of the laminated body.

公开(公告)号：US20250087403A1

公开(公告)日：2025-03-13

申请号：US18960557

申请日：2024-11-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F27/255 ,  H01F1/147 ,  H01F41/02

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si, wherein the oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from the alloy particle side. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer where Si content takes a local maximum value, the second oxide layer is a layer where Fe content takes a local maximum value, and the third oxide layer is a layer where Si content takes a local maximum value.

公开(公告)号：US20230343512A1

公开(公告)日：2023-10-26

申请号：US18345907

申请日：2023-06-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takuya ISHIDA ,  Makoto YAMAMOTO ,  Katsutoshi UJI ,  Yuya ISHIDA ,  Mitsuru ODAHARA

IPC: H01F41/02 ,  H01F1/147 ,  B22F1/16 ,  B22F1/142

CPC classification number: H01F41/0246 ,  H01F1/14766 ,  B22F1/16 ,  B22F1/142 ,  B22F2302/25 ,  B22F2301/35 ,  Y10T428/12181 ,  B22F1/145

Abstract: A metal magnetic particle provided with an oxide layer on a surface of an alloy particle containing Fe and Si. The oxide layer has a first oxide layer, a second oxide layer, and a third oxide layer from a side of the alloy particle. All of the first oxide layer, the second oxide layer, and the third oxide layer contain Si. Also, in line analysis of element content by using a scanning transmission electron microscope-energy dispersive X-ray spectroscopy, the first oxide layer is a layer having Fe content smaller than Si content in the alloy particle, the second oxide layer is a layer having Fe content larger than the Si content in the alloy particle, and the third oxide layer is a layer having Fe content smaller than the Si content in the alloy particle.

公开(公告)号：US20230096644A1

公开(公告)日：2023-03-30

申请号：US17932939

申请日：2022-09-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masayuki OISHI ,  Takashi SAKAI ,  Makoto YAMAMOTO

IPC: H01F27/32 ,  H01F27/29 ,  H01F41/12

Abstract: A coil component includes a multilayer body including a plurality of insulating layers and a plurality of coil conductor layers which are stacked in a stacking direction, and a first via conductor and a second via conductor that electrically connect the coil conductor layers. The first via conductor is smaller than the second via conductor.