公开(公告)号：US12198864B2

公开(公告)日：2025-01-14

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 ,  H01G4/008 ,  H01G4/012 ,  H01G4/08 ,  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：US11810725B2

公开(公告)日：2023-11-07

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 ,  H01G4/12 ,  H01G4/008 ,  H01G4/012

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

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：US11735368B2

公开(公告)日：2023-08-22

申请号：US17487349

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 ,  H01G4/008 ,  H01G4/12 ,  H01G4/012

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

Abstract: In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 μm or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.

公开(公告)号：US12119183B2

公开(公告)日：2024-10-15

申请号：US18524673

申请日：2023-11-30

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 ,  H01G4/008 ,  H01G4/12 ,  H01G4/30

CPC classification number: H01G4/2325 ,  H01G4/008 ,  H01G4/1227 ,  H01G4/30

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.

公开(公告)号：US12009157B2

公开(公告)日：2024-06-11

申请号：US18218300

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 ,  H01G4/008 ,  H01G4/012 ,  H01G4/12

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

Abstract: In a multilayer ceramic capacitor, a positional deviation in a lamination direction between end portions in a width direction intersecting the lamination direction and a length direction, of two of internal electrode layers adjacent to each other in the lamination direction, is about 5 μm or less. A connection ratio N1/N0 at the middle portion thereof, and a connection ratio N2/N0 at the end portion thereof are about 90% or more, respectively, and a difference between N1/N0 and N2/N0 is about 10% or less.

公开(公告)号：US12068117B2

公开(公告)日：2024-08-20

申请号：US18375681

申请日：2023-10-02

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

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

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：US11862402B2

公开(公告)日：2024-01-02

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 ,  H01G4/008 ,  H01G4/12 ,  H01G4/30

CPC classification number: H01G4/2325 ,  H01G4/008 ,  H01G4/1227 ,  H01G4/30

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.

公开(公告)号：US11735369B2

公开(公告)日：2023-08-22

申请号：US17487385

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 ,  H01G4/12 ,  H01G4/008

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