公开(公告)号：US20230360856A1

公开(公告)日：2023-11-09

申请号：US18218303

申请日：2023-07-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita KITAHARA ,  Yuta SAITO ,  Noriyuki OOKAWA ,  Riyousuke AKAZAWA ,  Takefumi TAKAHASHI ,  Masahiro WAKASHIMA ,  Yuta KUROSU ,  Akito MORI

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

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/008 ,  H01G4/1218

Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, and external electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers, the external electrode layers each further including a base electrode layer including a first region, a second region, and a third region divided therein, in order from the multilayer body. The first region includes a metal included in the internal electrode layers in a higher amount than the second region and the third region, the second region includes glass in a higher amount than the first region and the third region, and the third region includes copper in a higher amount than the first region and the second region.

公开(公告)号：US20250149250A1

公开(公告)日：2025-05-08

申请号：US19014338

申请日：2025-01-09

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Noriyuki OOKAWA

IPC: H01G4/30 ,  H01G4/012 ,  H01G4/232

Abstract: An electronic component includes a base body, a first internal electrode, and a first external electrode. The first internal electrode is located inside the base body. The first external electrode covers a part of the outer surface of the base body. The first external electrode includes a first electrode covering a part of the outer surface of the base body and connected to the first internal electrode, and a second electrode covering the outer surface of the first electrode. The second electrode has spherical copper particles and silicon. An average size of the spherical copper particles is different in a first part of the second electrode than in a second part of the spherical electrode.

公开(公告)号：US20250095922A1

公开(公告)日：2025-03-20

申请号：US18966314

申请日：2024-12-03

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita KITAHARA ,  Yuta SAITO ,  Noriyuki OOKAWA ,  Riyousuke AKAZAWA ,  Takefumi TAKAHASHI ,  Masahiro WAKASHIMA ,  Yuta KUROSU ,  Akito MORI

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, and external electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers, the external electrode layers each further including a base electrode layer including a first region, a second region, and a third region divided therein, in order from the multilayer body. The first region includes a metal included in the internal electrode layers in a higher amount than the second region and the third region, the second region includes glass in a higher amount than the first region and the third region, and the third region includes copper in a higher amount than the first region and the second region.

公开(公告)号：US20230317375A1

公开(公告)日：2023-10-05

申请号：US18124606

申请日：2023-03-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuichiro MORIMOTO ,  Toshiyuki NAKAMURA ,  Noriyuki OOKAWA ,  Daisho TSUBOKAWA ,  Masaru TAKAHASHI ,  Nobuyasu HAMAMORI

IPC: H01G4/232 ,  H01G4/30 ,  H01G4/012 ,  H01G4/008 ,  H01G4/12 ,  H01G2/06

CPC classification number: H01G4/2325 ,  H01G4/30 ,  H01G4/012 ,  H01G4/008 ,  H01G4/12 ,  H01G2/065

Abstract: In a three-terminal multilayer ceramic capacitor, each of first through fourth external electrodes includes a base electrode layer including a conductive metal and a glass component, an organic layer including an organosilicon compound covering the base electrode layer, and a plating layer on the organic layer. On a surface of the organic layer in a portion facing the plating layer, an atomic concentration ratio of Si to Cu is greater than or equal to about 1.5% and less than or equal to about 5.5%, or greater than or equal to about 0.8% and less than or equal to about 2.8%, and a surface roughness is greater than or equal to about 0.334 and less than or equal to about 0.371, or greater than or equal to about 0.352 and less than or equal to about 0.395.

公开(公告)号：US20220102078A1

公开(公告)日：2022-03-31

申请号：US17487353

申请日：2021-09-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita KITAHARA ,  Yuta SAITO ,  Noriyuki OOKAWA ,  Riyousuke AKAZAWA ,  Takefumi TAKAHASHI ,  Masahiro WAKASHIMA ,  Yuta KUROSU ,  Akito MORI

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including dielectric layers and internal electrode layers alternately laminated therein, two outer layer portions respectively provided on both sides of the inner layer portion in a lamination direction, and two side gap portions respectively provided on both side surfaces of the inner layer portion and the outer layer portions, in a width direction intersecting the lamination direction, and external electrodes respectively provided on both end surfaces of the multilayer body in a length direction intersecting the lamination direction and the width direction, and each connected to the internal electrode layers, wherein nickel and magnesium are segregated between the side gap portions and the outer layer portions.

公开(公告)号：US20220102075A1

公开(公告)日：2022-03-31

申请号：US17487346

申请日：2021-09-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keita KITAHARA ,  Yuta SAITO ,  Noriyuki OOKAWA ,  Riyousuke AKAZAWA ,  Takefumi TAKAHASHI ,  Masahiro WAKASHIMA ,  Yuta KUROSU ,  Akito MORI

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including dielectric layers and internal electrode layers alternately laminated therein, base electrode layers respectively provided on both end surfaces of the multilayer body in a length direction intersecting a lamination direction, and each connected to the internal electrode layers and each including glass and copper, and plated layers respectively provided on an outer side of the base electrode layers. A protective layer including sulfur is provided between the glass included in the base electrode layers and the plated layers.