公开(公告)号：US20240186068A1

公开(公告)日：2024-06-06

申请号：US18438836

申请日：2024-02-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yuta OSHIMA ,  Shinya ISOTA ,  Sho WATANABE

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

CPC classification number: H01G4/1227 ,  H01G4/012 ,  H01G4/30 ,  H01G4/2325

Abstract: A multilayer ceramic capacitor includes an element body portion and a pair of outer electrodes on first and second end surfaces and connected to inner electrode layers. The element body portion includes first and second side margin portions, and first and second outer layer portions, and an inner layer portion. A dielectric includes dielectric particles including barium and titanium, and, as sub-components, rare earth elements, and one or more first additional elements. In a cross section crossing a center in a length direction, dielectric layers included in an inner layer portion include core-shell particles and uniform solid solution particles. A ratio of average areas occupied by the core-shell particles and the uniform solid solution particles is about 0.8 to about 1.5, and a coefficient of variation of a first additional element concentration in the uniform solid solution particles is equal to or less than about 20%.

公开(公告)号：US20230099467A1

公开(公告)日：2023-03-30

申请号：US17947446

申请日：2022-09-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takumi ENDOU ,  Sho WATANABE ,  Akito MORI ,  Masahiro WAKASHIMA

IPC: H01G4/12 ,  H01G4/008

Abstract: A multilayer ceramic capacitor includes dielectric layers made of a ceramic material and internal electrode layers laminated therein. The internal electrode layers each include dielectric columns provided therein. A solid solution layer in which S is solidly dissolved is provided at an interface between each of the dielectric columns and each of the internal electrode layers.

公开(公告)号：US20230101251A1

公开(公告)日：2023-03-30

申请号：US17947271

申请日：2022-09-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Akito MORI ,  Masahiro WAKASHIMA ,  Sho WATANABE ,  Takumi ENDOU

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including internal electrode layers and inner dielectric layers laminated alternately, and internal electrode layers at both ends thereof in a lamination direction, and outer dielectric layers covering the inner layer portion, and two external electrodes on both end surfaces of the multilayer body in a length direction intersecting the lamination direction. The inner and outer dielectric layers each include grains, and a difference between an average grain size of grains in the inner dielectric layers and an average grain size of grains in the outer dielectric layers is about 100 nm or less.

公开(公告)号：US20250037939A1

公开(公告)日：2025-01-30

申请号：US18913062

申请日：2024-10-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Akito MORI ,  Masahiro WAKASHIMA ,  Sho WATANABE ,  Takumi ENDOU

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion including internal electrode layers and inner dielectric layers laminated alternately, and internal electrode layers at both ends thereof in a lamination direction, and outer dielectric layers covering the inner layer portion, and two external electrodes on both end surfaces of the multilayer body in a length direction intersecting the lamination direction. The inner and outer dielectric layers each include grains, and a difference between an average grain size of grains in the inner dielectric layers and an average grain size of grains in the outer dielectric layers is about 100 nm or less.

公开(公告)号：US20240274356A1

公开(公告)日：2024-08-15

申请号：US18646890

申请日：2024-04-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takumi ENDOU ,  Sho WATANABE ,  Akito MORI ,  Masahiro WAKASHIMA

IPC: H01G4/12 ,  H01G4/008

CPC classification number: H01G4/1218 ,  H01G4/008

Abstract: A multilayer ceramic capacitor includes dielectric layers made of a ceramic material and internal electrode layers laminated therein. The internal electrode layers each include dielectric columns provided therein. A solid solution layer in which S is solidly dissolved is provided at an interface between each of the dielectric columns and each of the internal electrode layers.