公开(公告)号：US20240290546A1

公开(公告)日：2024-08-29

申请号：US18657890

申请日：2024-05-08

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：US20240029958A1

公开(公告)日：2024-01-25

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

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

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：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：US20240105391A1

公开(公告)日：2024-03-28

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：US20210202177A1

公开(公告)日：2021-07-01

申请号：US17131888

申请日：2020-12-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuta KUROSU ,  Yuta SAITO ,  Masahiro WAKASHIMA ,  Daiki FUKUNAGA ,  Yu TSUTSUI

IPC: H01G4/30 ,  H01G4/232 ,  H01G4/008 ,  H01G4/12 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a second alloy portion including one metal element provided in a greatest amount among metal elements of an internal electrode layer, and one or more metal elements among a metal group including Sn, In, Ga, Zn, Bi, Pb, Cu, Ag, Pd, Pt, Ph, Ir, Ru, Os, Fe, V, and Y is provided between a second dielectric ceramic layer and a first internal electrode layer, and between a second dielectric ceramic layer and a second internal electrode layer, respectively.

公开(公告)号：US20210202171A1

公开(公告)日：2021-07-01

申请号：US17131893

申请日：2020-12-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yu TSUTSUI ,  Yuta KUROSU ,  Daiki FUKUNAGA ,  Yuta SAITO ,  Masahiro WAKASHIMA

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

Abstract: A multilayer ceramic capacitor includes, in at least one of a region between an end of a first internal electrode layer which is not connected to a second external electrode and the second external electrode, and a region between an end of a second internal electrode layer which is not connected to a first external electrode and the first external electrode, in a length direction, a defect portion provided on a plane including a stacking direction and a width direction, such that the defect portion is located between the first dielectric ceramic layers in the stacking direction and is located between the second dielectric ceramic layer and the third dielectric ceramic layer in the width direction.

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：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.

公开(公告)号：US20210202181A1

公开(公告)日：2021-07-01

申请号：US17131899

申请日：2020-12-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Masahiro WAKASHIMA ,  Yuta SAITO ,  Yuta KUROSU ,  Daiki FUKUNAGA ,  Yu TSUTSUI

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

Abstract: In a multilayer ceramic capacitor includes, in a plane including a center portion in a length direction, and a stacking direction and a width direction of a first dielectric ceramic layer, where a thickness at a center portion in the stacking direction is T1, a thickness at an end of the first dielectric ceramic layer in the width direction is T2, and respective thicknesses between an end of a first internal electrode layer in the length direction not connected to a second external electrode, and the second external electrode, and between an end of the second internal electrode layer in the length direction not connected to the first external electrode, and the first external electrode is T3, a difference in thickness between T1 and T2 is within about 10% of T1, and a thickness of T3 is greater than T1 and T2 and a difference thereof is about 10% or more of T1 and T2.