公开(公告)号：US09984824B2

公开(公告)日：2018-05-29

申请号：US15210933

申请日：2016-07-15

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/30 ,  H01G4/005 ,  H01G4/232 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/1218 ,  H01G4/232

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.

公开(公告)号：US11094462B2

公开(公告)日：2021-08-17

申请号：US16656703

申请日：2019-10-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/232

Abstract: A multilayer ceramic electronic component includes a laminate, a first external electrode on a first end surface of the laminate, and a second external electrode on a second end surface of the laminate. The laminate includes a central layer portion in which each first internal electrode layer and each second internal electrode layer oppose each other with a dielectric ceramic layer therebetween, peripheral layer portions sandwiching the central layer portion in a lamination direction, and side margins sandwiching the central layer portion and the peripheral layer portions in a width direction. The side margins each include multiple ceramic layers laminated in the width direction, and the ceramic layers include an inner layer disposed closest to the laminate and an outer layer disposed farthest from the laminate.

公开(公告)号：US10361034B2

公开(公告)日：2019-07-23

申请号：US16199546

申请日：2018-11-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/30 ,  H01G4/005 ,  H01G4/232 ,  H01G4/12

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.

公开(公告)号：US09812261B2

公开(公告)日：2017-11-07

申请号：US15415989

申请日：2017-01-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka ,  Koji Moriyama

IPC: H01G4/30 ,  H01G4/012 ,  H01G4/12 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic body and external electrodes provided on opposite end surfaces of the ceramic body. The ceramic body includes an inner layer portion including a plurality of ceramic layers defining inner layers and a plurality of first and second internal electrodes each disposed at an interface of adjacent ones of the ceramic layers defining the inner layers, outer layer portions sandwiching the inner layer portion in a direction in which the layers are stacked, and side margin portions sandwiching the inner layer portion and the outer layer portions in a widthwise direction. The side margin portion includes pores that decrease in number along a direction from inside to outside of the ceramic body.

公开(公告)号：US09633788B2

公开(公告)日：2017-04-25

申请号：US14711975

申请日：2015-05-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka ,  Koji Moriyama

IPC: H01G4/012 ,  H01G4/30 ,  H01G4/12 ,  H01G4/248 ,  H01G4/005

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic body and external electrodes provided on opposite end surfaces of the ceramic body. The ceramic body includes an inner layer portion including a plurality of ceramic layers defining inner layers and a plurality of first and second internal electrodes each disposed at an interface of adjacent ones of the ceramic layers defining the inner layers, outer layer portions sandwiching the inner layer portion in a direction in which the layers are stacked, and side margin portions sandwiching the inner layer portion and the outer layer portions in a widthwise direction. The side margin portion includes pores that decrease in number along a direction from inside to outside of the ceramic body.

公开(公告)号：US11798746B2

公开(公告)日：2023-10-24

申请号：US17203846

申请日：2021-03-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/005 ,  H01G4/232 ,  H01G4/30 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/232 ,  H01G4/1218

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.

公开(公告)号：US11610736B2

公开(公告)日：2023-03-21

申请号：US17368909

申请日：2021-07-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka ,  Masahiro Wakashima ,  Daisuke Hamada ,  Hironori Tsutsumi ,  Satoshi Maeno ,  Ryota Aso ,  Koji Moriyama ,  Akihiro Tsuru

IPC: H01G4/12 ,  H01G4/012 ,  H01G4/008 ,  H01G4/232 ,  H01G4/224 ,  H01G4/30

Abstract: An electronic component includes a laminate in which a plurality of dielectric layers and a plurality of internal electrodes are alternately laminated and external electrodes electrically connected to the internal electrodes. A side margin portion as a region in which the plurality of internal electrodes is not provided when a section of the laminate having the length direction and the width direction is viewed from the laminating direction includes a plurality of side margin layers laminated in the width direction. An outer layer portion as a region in which the plurality of internal electrodes is not provided except for the side margin portion when a section of the laminate including the laminating direction and the width direction is viewed from the length direction includes a plurality of layer-margin layers laminated in the laminating direction.

公开(公告)号：US11120945B2

公开(公告)日：2021-09-14

申请号：US16793041

申请日：2020-02-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/005 ,  H01G4/232 ,  H01G4/30 ,  H01G4/12

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.

公开(公告)号：US10861647B2

公开(公告)日：2020-12-08

申请号：US15902188

申请日：2018-02-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuya Takagi ,  Akira Fujita ,  Hideaki Tanaka ,  Togo Matsui

IPC: H01G4/012 ,  H01G4/30 ,  H01G4/224 ,  H01G4/12 ,  H01G4/248 ,  H01G4/232

Abstract: A method for manufacturing a monolithic ceramic electronic component includes preparing a mother block including ceramic green sheets stacked on each other, and an internal electrode pattern arranged along interfaces between the ceramic green sheets, cutting the mother block along first and second cutting lines that are perpendicular or substantially perpendicular to each other to obtain green chips each having a laminated structure including ceramic layers and internal electrodes in a raw state, the internal electrodes being exposed on a cut side surface produced by cutting along the first cutting line, forming a raw ceramic protective layer on the cut side surface to obtain a raw component body, and firing the raw component body, wherein the cut side surface is treated with a degreasing agent.

公开(公告)号：US10600575B2

公开(公告)日：2020-03-24

申请号：US16285286

申请日：2019-02-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/005 ,  H01G4/232 ,  H01G4/30 ,  H01G4/12

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.