公开(公告)号：US20160268046A1

公开(公告)日：2016-09-15

申请号：US15067459

申请日：2016-03-11

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Yasuhiro NISHISAKA ,  Yoshito SAITO

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

CPC classification number: H01G4/2325 ,  H01G4/0085 ,  H01G4/12 ,  H01G4/232 ,  H01G4/30

Abstract: A multilayer ceramic capacitor contains Ni in internal electrodes, and includes a sintered metal layer containing Cu in external electrodes. At a joined portion between each internal electrode and each external electrode, mutual diffusion layers of Cu and Ni extend across the internal and external electrodes. On each internal electrode, a mutual diffusion layer is present with a thickness t1, which is defined by a dimension from a first end surface or a second end surface to an interior end in a longitudinal direction, not smaller than about 0.5 μm and not greater than about 5 μm. On each external electrode, a mutual diffusion layer is present with a thickness t2, which is defined by a dimension from the first end surface or the second end surface to an exterior end in the longitudinal direction, not smaller than about 2.5% and not greater than about 33.3% of a thickness t0 of a sintered metal layer.

Abstract translation: 多层陶瓷电容器在内部电极中含有Ni，并且包括在外部电极中含有Cu的烧结金属层。 在每个内部电极和每个外部电极之间的接合部分，Cu和Ni的相互扩散层延伸穿过内部和外部电极。 在每个内部电极上，存在相互扩散层，其厚度t1由从第一端面或第二端面到纵向方向内端的尺寸限定，不小于约0.5μm且不大于 比约5μm。 在每个外部电极上，存在相互扩散层，其厚度t2由从第一端面或第二端面到纵向方向的外端的尺寸限定，不小于约2.5％且不大于 比烧结金属层的厚度t0的约33.3％。

公开(公告)号：US20210065978A1

公开(公告)日：2021-03-04

申请号：US16987427

申请日：2020-08-07

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hisashi FUJII ,  Yoshito SAITO ,  Masaki MASUDA ,  Hidekazu TAMURA

IPC: H01G4/12 ,  C04B35/468 ,  C04B35/626 ,  C04B35/64 ,  H01G4/30 ,  H01G4/005

Abstract: A multilayer electronic component includes a multilayer body including dielectric layers and inner electrode layers, the multilayer body including an electrode facing portion in which the inner electrode layers are laminated to face each other with the dielectric layers interposed therebetween. The multilayer body has a thickness of at least about 1.5 mm in a lamination direction, a length of at least about 3.0 mm, and a width of at least about 1.5 mm. Each of the dielectric layers includes Ba, Ti, and Cl. A Cl concentration C1 in the entire electrode facing portion satisfies about 10 wtppm≤C1≤about 50 wtppm. On an imaginary central axis line, a Cl concentration C2 in a central portion of the electrode facing portion and a Cl concentration C3 in both end portions of the electrode facing portion satisfy about 0.5C2≤C3

公开(公告)号：US20150187498A1

公开(公告)日：2015-07-02

申请号：US14541212

申请日：2014-11-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kazuhisa UCHIDA ,  Yoshito SAITO ,  Jun IKEDA

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

CPC classification number: H01G4/1227 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/30

Abstract: In a multilayer ceramic capacitor, an inner ceramic layer includes a perovskite-type compound containing Ba and Ti. A region within an electrically effective portion of the inner ceramic layers sandwiched between inner electrodes, which is near an area where inner and outer electrodes connect to each other, is subjected to a mapping analysis using EDS. ((L2−L3)/L1)×100≧50 is satisfied, L1 denotes a total length of ceramic grain boundaries detected from a TEM transmission image, L2 denotes a total length of grain boundaries, detected from a mapping image and the TEM transmission image, where the rare earth element is present, and L3 denotes a total length of portions, detected from a mapping image and the TEM transmission image, in which the grain boundaries where the rare earth element is present and grain boundaries where at least one of Mn, Mg, and Si is present are overlapped.

Abstract translation: 在多层陶瓷电容器中，内部陶瓷层包括含有Ba和Ti的钙钛矿型化合物。 夹在内部电极之间的内部陶瓷层的电学有效部分内的区域，其内部和外部电极彼此连接的区域附近，使用EDS进行映射分析。 （（L2-L3）/ L1）×100≥50，L1表示从TEM透射图像检测出的陶瓷晶界的总长度，L2表示从映射图像和TEM透射检测出的晶界的总长度 图像，其中存在稀土元素，L3表示从映射图像和TEM透射图像检测的部分的总长度，其中存在稀土元素的晶界和晶界，其中至少一个 Mn，Mg和Si存在重叠。

公开(公告)号：US20150187497A1

公开(公告)日：2015-07-02

申请号：US14582260

申请日：2014-12-24

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Yoshito SAITO ,  Jun IKEDA ,  Kazuhisa UCHIDA

IPC: H01G4/12 ,  H01J37/26 ,  H01G4/005 ,  G01N23/225 ,  H01G4/30 ,  H01G4/248

CPC classification number: H01G4/1218 ,  G01N23/2252 ,  H01G4/0085 ,  H01G4/1227 ,  H01G4/2325 ,  H01G4/30

Abstract: In a monolithic ceramic capacitor, ceramic layers defining inner layers are mainly composed of a perovskite compound containing Ba and Ti. A portion of an electrically effective section in the ceramic layers near a connecting portion between the inner electrodes and an outer electrode undergoes mapping analysis by an energy-dispersive method. In regions of the resulting mapping image, the regions extending from the interfaces between the inner electrodes and a corresponding one of the ceramic layers to positions about ⅓ of the thickness of the ceramic layer in the stacking direction, ((L2−L3)/L1)×100≧50 is satisfied, where L1 represents the total length of grain boundaries, L2 represents the total length of grain boundaries where a rare-earth element is present, and L3 represents the total length of portions where the grain boundaries where the rare-earth element is present are overlapped with grain boundaries with a specific element present.

Abstract translation: 在单片陶瓷电容器中，限定内层的陶瓷层主要由含有Ba和Ti的钙钛矿化合物组成。 陶瓷层中靠近内部电极和外部电极之间的连接部分的电气部分的一部分通过能量分散方法进行映射分析。 在所得到的映射图像的区域中，从内部电极和对应的一个陶瓷层之间的界面延伸到层叠方向上约为陶瓷层厚度的1/3的区域（（L2-L3）/ L1 ）×100≥50，其中L1表示晶界的总长度，L2表示存在稀土元素的晶界的总长度，L3表示稀土元素的晶界的部分的总长度 存在的地层元素与存在特定元素的晶界重叠。