公开(公告)号：US20170178809A1

公开(公告)日：2017-06-22

申请号：US15447284

申请日：2017-03-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yasuhiro NISHISAKA ,  Takehisa SASABAYASHI ,  Satoshi MURAMATSU

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

CPC classification number: H01G4/248 ,  H01G4/12 ,  H01G4/2325 ,  H01G4/30

Abstract: A multilayer ceramic capacitor includes an external electrode that is unlikely to be peeled. First and second external electrodes each include base layers provided over a ceramic body and including a metal and glass, and Cu plated layers provided over the base layers. The multilayer ceramic capacitor includes a reactive layer. The reactive layer contains about 5 atomic % to about 15 atomic % of Ti, about 5 atomic % to about 15 atomic % of Si, and about 2 atomic % to about 10 atomic % of V.

公开(公告)号：US20220102076A1

公开(公告)日：2022-03-31

申请号：US17411147

申请日：2021-08-25

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinya ISOTA ,  Takehisa SASABAYASHI ,  Kazuhisa UCHIDA ,  Hideyuki HASHIMOTO ,  Yuta OSHIMA

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

Abstract: A multilayer ceramic capacitor includes a base body including first and second main surfaces, first and second side surfaces, first and second end surfaces, and dielectric layers and internal electrode layers, and external electrodes at the first and second end surfaces, and electrically connected to the internal electrode layers. The base body includes an inner layer, first and second outer layers, first and second side margin portions. The dielectric layers in the inner layer and the first and second outer layers include main crystal grains including barium and titanium, and with respect to 100 parts by mol of titanium, nickel in an amount of about 0.2 to about 3.0 parts by mol, and at least one rare earth element selected from yttrium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium in an amount of about 0.6 parts to about 2.0 parts by mol.

公开(公告)号：US20140293503A1

公开(公告)日：2014-10-02

申请号：US14228331

申请日：2014-03-28

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takehisa SASABAYASHI ,  Akihiro MOTOKI ,  Makoto OGAWA

IPC: H01G4/005 ,  H01G4/008 ,  H01G4/30

CPC classification number: H01G4/30 ,  H01C1/148 ,  H01C7/008 ,  H01C7/18 ,  H01F17/0013 ,  H01F27/292 ,  H01G4/012 ,  H01G4/232 ,  H01G4/2325 ,  H01L41/0471 ,  H01L41/0472

Abstract: A monolithic ceramic electronic component includes an outer electrode including a first plating layer formed directly on a component body by electroless plating so as to cover an exposed portion distribution region including exposed portions of a plurality of inner electrodes and a second plating layer formed by electrolytic plating so as to cover the first plating layer. An amount of extension of the first plating E1 and an amount of extension of the second plating E2 satisfy the relationship E1/(E1+E2)≦20%, where E1 represents a distance from an edge of the exposed portion distribution region to an edge of the first plating layer, and E2 represents a distance from the edge of the first plating layer to an edge of the second plating layer.

Abstract translation: 单片陶瓷电子部件包括外电极，其包括通过化学镀直接形成在部件主体上的第一镀层，以覆盖包括多个内电极的暴露部分的暴露部分布区域和由电解电镀形成的第二镀层 以覆盖第一镀层。 第一电镀E1的延伸量和第二电镀E2的延伸量满足关系E1 /（E1 + E2）＆nlE; 20％，其中E1表示从暴露部分布区域的边缘到 第一镀层的边缘，E2表示从第一镀层的边缘到第二镀层的边缘的距离。

公开(公告)号：US20240274357A1

公开(公告)日：2024-08-15

申请号：US18608993

申请日：2024-03-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideyuki HASHIMOTO ,  Takehisa SASABAYASHI

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

CPC classification number: H01G4/1272 ,  H01G4/008 ,  H01G4/012 ,  H01G4/30

Abstract: A multilayer ceramic capacitor includes outer electrodes at first and second end surfaces and coupled to inner electrode layers. Dielectric ceramic layers include crystal grains including a perovskite oxide. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. When a thickness of the dielectric ceramic layers is denoted by d, at least a subset of the grains is provided in near-electrode regions located inside the dielectric ceramic layers and extending to a distance of about 0.1 d from interfaces with adjacent inner electrode layers.

公开(公告)号：US20210020380A1

公开(公告)日：2021-01-21

申请号：US16930350

申请日：2020-07-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takehisa SASABAYASHI ,  Kiyoshiro ISHIBE ,  Kenji UENO ,  Ai FUKUMORI ,  Akihiro TSURU ,  Daisuke HAMADA

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

Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers. Each of the dielectric layers includes first crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 300 nm and an average aspect ratio of more than or equal to about 5, each of the inner electrode layers includes second crystal grains defining and functioning as plate-shaped objects that have an average thickness of less than or equal to about 150 nm and an average aspect ratio of more than or equal to about 5, where an aspect ratio is represented by a ratio of a major axis of each plate-shaped object to a thickness of the plate-shaped object with the major axis of the plate-shaped object being orthogonal or substantially orthogonal to a thickness direction of the plate-shaped object.

公开(公告)号：US20240428992A1

公开(公告)日：2024-12-26

申请号：US18818712

申请日：2024-08-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenji KIMURA ,  Kosuke URATANI ,  Takehisa SASABAYASHI

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

Abstract: A multilayer ceramic capacitor includes a multilayer body including an inner layer portion defined by alternately laminating a plurality of dielectric layers and a plurality of inner electrode layers, and a pair of side margin portions sandwiching the inner layer portion in a width direction. When viewing a cross-section provided by cutting the multilayer body at a position at a central portion in a length direction and defined by the width direction and a lamination direction, a crystalline oxide including at least one of Al, Mg, and Si is present in the side margin portions as an elongate secondary phase at an aspect ratio equal to or above about 5 and equal to or below about 20.

公开(公告)号：US20200273623A1

公开(公告)日：2020-08-27

申请号：US16788345

申请日：2020-02-12

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takehisa SASABAYASHI ,  Akitaka DOI ,  Kotaro SHIMIZU ,  Yoko OKABE

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/012 ,  H01G4/02

Abstract: A multilayer ceramic capacitor includes a ceramic body including a stack of dielectric layers and internal electrodes, and an external electrode electrically connected to each of the internal electrodes and provided at each of both end surfaces of the ceramic body. The external electrode includes a metal layer and a plating layer on the metal layer. In a cross section of the metal layer that is obtained by cutting the external electrode along a plane parallel to a side surface at a central position in a width direction, the metal layer includes a dielectric material at an area ratio of about 20% or more, and includes cavities at an area ratio of about 5% or more and about 20% or less, the cavities having an average diameter of about 0.5 μm or more and about 1.5 μm or less, and having a maximum diameter of about 5.0 μm or less.

公开(公告)号：US20140211369A1

公开(公告)日：2014-07-31

申请号：US14160947

申请日：2014-01-22

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Takehisa SASABAYASHI ,  Akihiro MOTOKI ,  Makoto OGAWA

IPC: H01G4/008 ,  H01G4/30

CPC classification number: H01G4/008 ,  H01G4/0085 ,  H01G4/12 ,  H01G4/232 ,  H01G4/30

Abstract: A monolithic ceramic electronic component includes a component body and outer electrodes. The component body includes a plurality of stacked ceramic layers and a plurality of inner electrodes which extend between the ceramic layers, which contain Ni, and which include exposed ends exposed on predetermined surfaces of the component body. The outer electrodes are electrically connected to the exposed ends of the inner electrodes and are formed on the predetermined surfaces of the component body by plating. The inner electrodes include Mg—Ni coexistence regions where Mg and Ni coexist.

Abstract translation: 单片陶瓷电子部件包括部件主体和外部电极。 元件主体包括多个堆叠的陶瓷层和多个内部电极，其在包含Ni的陶瓷层之间延伸，并且其包括暴露在组件主体的预定表面上的暴露端。 外部电极与内部电极的露出端电连接，并且通过电镀形成在部件主体的预定表面上。 内部电极包括其中Mg和Ni共存的Mg-Ni共存区域。

公开(公告)号：US20240222022A1

公开(公告)日：2024-07-04

申请号：US18608999

申请日：2024-03-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideyuki HASHIMOTO ,  Takehisa SASABAYASHI

IPC: H01G4/12 ,  H01G4/224 ,  H01G4/30

CPC classification number: H01G4/1227 ,  H01G4/224 ,  H01G4/306

Abstract: A multilayer ceramic capacitor includes dielectric ceramic layers and inner electrode layers. The dielectric ceramic layers include crystal grains including a perovskite oxide including at least one A-site element and at least one B-site element. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. The grains, when subjected to compositional analysis by energy dispersive x-ray spectroscopy, have an atom-distributed region in which a concentration of the A-site element or B-site element (c) subtracted from a maximum concentration of the element (cmax) (Δc=cmax−c) is about 2 atm % or less, at one or more atomic sites in the grains, and an area of the atom-distributed region (SΔc≤2%) is about 0.050 nm2 or less.

公开(公告)号：US20240222021A1

公开(公告)日：2024-07-04

申请号：US18608996

申请日：2024-03-19

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideyuki HASHIMOTO ,  Takehisa SASABAYASHI

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

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

Abstract: A multilayer ceramic capacitor includes a body including dielectric ceramic layers and inner electrode layers. The dielectric ceramic layers include crystal grains including a perovskite oxide including at least one A-site element and at least one B-site element. When a cross-section of the dielectric ceramic layers is observed using a scanning transmission electron microscope, the dielectric ceramic layers include grains, on which a plane of a perovskite structure is observed, as crystal grains. In the cross-section, a percentage by number of the grains in the crystal grains is about 4% or more.