公开(公告)号：US09236187B2

公开(公告)日：2016-01-12

申请号：US14621450

申请日：2015-02-13

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki Wada ,  Kohei Shimada ,  Kenji Takagi ,  Tomomi Koga ,  Tomotaka Hirata ,  Hitoshi Nishimura ,  Hiroki Awata ,  Sui Uno

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/012 ,  H01G4/224 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1245 ,  H01G4/224 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic main body including an inner layer portion including third ceramic layers and a plurality of inner electrodes arranged at interfaces between the third ceramic layers, and first and second outer layer portions respectively including first and second ceramic layers, the first and second ceramic layers being arranged vertically so as to sandwich the inner layer portion. The third ceramic layers and the first and second outer layer portions contain a perovskite-type compound represented by ABO3 where A contains one or more of Ba, Sr, and Ca, B contains one or more of Ti, Zr, and Hf, and O represents oxygen) as a main component. Where a rare-earth element concentration (CR) in the third ceramic layers is compared to a rare-earth element concentration (Cr) in outermost layer portions including at least outermost surfaces of the first and second outer layer portions, CR>Cr (inclusive of Cr=0).

公开(公告)号：US08841225B2

公开(公告)日：2014-09-23

申请号：US13633317

申请日：2012-10-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tomomi Koga ,  Koichi Banno

IPC: C04B35/468 ,  H01G4/12 ,  C04B35/628 ,  C04B35/626 ,  H01G4/30 ,  C04B35/49 ,  C01G23/00

CPC classification number: H01G4/30 ,  B82Y30/00 ,  C01G23/006 ,  C01P2002/34 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2006/40 ,  C01P2006/42 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/6262 ,  C04B35/62685 ,  C04B35/62813 ,  C04B35/62815 ,  C04B35/62818 ,  C04B35/62826 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3249 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/85 ,  H01G4/1218 ,  H01G4/1227 ,  Y10T428/2993

Abstract: A dielectric ceramic that includes a sintered body of BaTiO3 based ceramic grains, in which the ceramic grains each include a shell part as a surface layer part and a core part inside the shell part. The ceramic grains contain, as accessory constituents, R (R, which is a rare-earth element, is at least one selected from the group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Y) and M (M is at least one selected from the group consisting of Mg, Mn, Ni, Co, Fe, Cr, Cu, Al, Mo, W, and V). R and M are present in the shell part of the ceramic grain, and concentrations of R and M contained in the shell part are increased from a grain boundary toward the core part.

Abstract translation: 1.一种电介质陶瓷，其特征在于，具备由BaTiO 3系陶瓷晶粒构成的烧结体，其中，所述陶瓷晶粒各自包括作为表层部的壳部和所述壳部内的芯部。 作为附属成分的陶瓷粒子含有作为稀土元素的R（R，选自Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er和Y中的至少一种） 和M（M是选自Mg，Mn，Ni，Co，Fe，Cr，Cu，Al，Mo，W和V中的至少一种）。 R和M存在于陶瓷颗粒的外壳部分中，壳体中所含的R和M的浓度从晶界向核心部分增加。

公开(公告)号：US09460852B2

公开(公告)日：2016-10-04

申请号：US14210786

申请日：2014-03-14

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Hiroyuki Wada ,  Kohei Shimada ,  Kenji Takagi ,  Tomomi Koga ,  Tomotaka Hirata ,  Hitoshi Nishimura ,  Hiroki Awata ,  Sui Uno

IPC: H01G4/30 ,  H01G4/06 ,  H01G4/12

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

Abstract: A laminated ceramic capacitor having a laminated body composed of a plurality of ceramic layers for inner layers; a plurality of internal electrodes at the interfaces between the plurality of ceramic layers for inner layers; and a plurality of ceramic layers for outer layers, provided on the top and bottom so as to sandwich the plurality of ceramic layers for inner layers. The ceramic layers for inner layers are composed of a material containing a multiple oxide including an alkaline-earth metal. The ceramic layers for outer layers respectively have TiO2 ceramic layers containing TiO2 as their main constituent for certain layers including the outermost layers, and multiple oxide ceramic layers containing a multiple oxide including an alkaline-earth metal for the other layers.

Abstract translation: 一种层叠陶瓷电容器，具有由多个内层用陶瓷层构成的层叠体， 在所述多个用于内层的陶瓷层之间的界面处的多个内部电极; 以及多个用于外层的陶瓷层，设置在顶部和底部，以便将多个陶瓷层夹在内层中。 内层的陶瓷层由含有碱土类金属的多重氧化物的材料构成。 用于外层的陶瓷层分别具有包含TiO 2作为其主要成分的TiO 2陶瓷层，其中包括最外层的某些层，以及包含用于其它层的包含碱土金属的多重氧化物的多个氧化物陶瓷层。

公开(公告)号：US20130222968A1

公开(公告)日：2013-08-29

申请号：US13633317

申请日：2012-10-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tomomi Koga ,  Koichi Banno

IPC: H01G4/30

CPC classification number: H01G4/30 ,  B82Y30/00 ,  C01G23/006 ,  C01P2002/34 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2004/84 ,  C01P2006/40 ,  C01P2006/42 ,  C04B35/4682 ,  C04B35/49 ,  C04B35/6262 ,  C04B35/62685 ,  C04B35/62813 ,  C04B35/62815 ,  C04B35/62818 ,  C04B35/62826 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/3244 ,  C04B2235/3249 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/3281 ,  C04B2235/3418 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/6582 ,  C04B2235/6584 ,  C04B2235/6588 ,  C04B2235/85 ,  H01G4/1218 ,  H01G4/1227 ,  Y10T428/2993

Abstract: A dielectric ceramic that includes a sintered body of BaTiO3 based ceramic grains, in which the ceramic grains each include a shell part as a surface layer part and a core part inside the shell part. The ceramic grains contain, as accessory constituents, R (R, which is a rare-earth element, is at least one selected from the group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Y) and M (M is at least one selected from the group consisting of Mg, Mn, Ni, Co, Fe, Cr, Cu, Al, Mo, W, and V). R and M are present in the shell part of the ceramic grain, and concentrations of R and M contained in the shell part are increased from a grain boundary toward the core part.

Abstract translation: 1.一种电介质陶瓷，其特征在于，具备由BaTiO 3系陶瓷晶粒构成的烧结体，其中，所述陶瓷晶粒各自包括作为表层部的壳部和所述壳部内的芯部。 作为附属成分的陶瓷粒子含有作为稀土元素的R（R，选自Nd，Sm，Eu，Gd，Tb，Dy，Ho，Er和Y中的至少一种） 和M（M是选自Mg，Mn，Ni，Co，Fe，Cr，Cu，Al，Mo，W和V中的至少一种）。 R和M存在于陶瓷颗粒的外壳部分中，壳体中所含的R和M的浓度从晶界向核心部分增加。

公开(公告)号：US10037851B2

公开(公告)日：2018-07-31

申请号：US15410928

申请日：2017-01-20

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki Wada ,  Kohei Shimada ,  Kenji Takagi ,  Tomomi Koga ,  Tomotaka Hirata ,  Hitoshi Nishimura ,  Hiroki Awata ,  Sui Uno

IPC: H01G4/30 ,  H01G2/24 ,  H01G4/12 ,  H01G4/224 ,  H01G4/012 ,  H01G4/242 ,  H05K1/18 ,  H05K3/30 ,  H01G4/232 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G2/24 ,  H01G4/012 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1236 ,  H01G4/1245 ,  H01G4/224 ,  H01G4/232 ,  H01G4/242 ,  H01G4/248 ,  H05K1/181 ,  H05K3/30 ,  H05K2201/10015

Abstract: A multilayer ceramic capacitor includes a laminated body including an inner layer portion including ceramic dielectric layers and internal electrodes, and outer layer portions including ceramic dielectric layers. External electrodes connected to the internal electrodes are provided on both ends of the laminated body. The main constituent of the inner layer portion is a perovskite-type compound represented by ABO3. The outer layer portions include first outer layers and second outer layers respectively containing oxides that differ from each other in main constituents, and boundary reaction layers are provided between the first outer layers and the second outer layers. First ceramic dielectric layers outside the boundary reaction layers differ in color from second ceramic dielectric layers inside the boundary reaction layers.

公开(公告)号：US09589729B2

公开(公告)日：2017-03-07

申请号：US14855571

申请日：2015-09-16

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki Wada ,  Kohei Shimada ,  Kenji Takagi ,  Tomomi Koga ,  Tomotaka Hirata ,  Hitoshi Nishimura ,  Hiroki Awata ,  Sui Uno

IPC: H01G4/30 ,  H01G2/24 ,  H01G4/12 ,  H01G4/224 ,  H01G4/012 ,  H01G4/242 ,  H05K1/18 ,  H05K3/30 ,  H01G4/232

CPC classification number: H01G4/30 ,  H01G2/24 ,  H01G4/012 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1236 ,  H01G4/1245 ,  H01G4/224 ,  H01G4/232 ,  H01G4/242 ,  H01G4/248 ,  H05K1/181 ,  H05K3/30 ,  H05K2201/10015

Abstract: A multilayer ceramic capacitor includes a laminated body including an inner layer portion including ceramic dielectric layers and internal electrodes, and outer layer portions including ceramic dielectric layers. External electrodes connected to the internal electrodes are provided on both ends of the laminated body. The main constituent of the inner layer portion is a perovskite-type compound represented by ABO3. The outer layer portions include first outer layers and second outer layers respectively containing oxides that differ from each other in main constituents, and boundary reaction layers are provided between the first outer layers and the second outer layers. First ceramic dielectric layers outside the boundary reaction layers differ in color from second ceramic dielectric layers inside the boundary reaction layers.

Abstract translation: 多层陶瓷电容器包括层叠体，其包括包含陶瓷电介质层和内部电极的内层部分和包括陶瓷电介质层的外层部分。 连接到内部电极的外部电极设置在层叠体的两端。 内层部分的主要成分是由ABO 3表示的钙钛矿型化合物。 外层部分包括分别包含在主要成分中彼此不同的氧化物的第一外层和第二外层，并且边界反应层设置在第一外层和第二外层之间。 边界反应层之外的第一陶瓷电介质层的颜色与边界反应层内部的第二陶瓷介电层的颜色不同。

公开(公告)号：US09042082B2

公开(公告)日：2015-05-26

申请号：US14528996

申请日：2014-10-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiroyuki Wada ,  Kohei Shimada ,  Kenji Takagi ,  Tomomi Koga ,  Tomotaka Hirata ,  Hitoshi Nishimura ,  Hiroki Awata ,  Sui Uno

IPC: H01G4/06 ,  H01G4/228 ,  H01G4/12 ,  H01G4/012 ,  H01G4/224 ,  H01G4/248 ,  H01G4/30

CPC classification number: H01G4/30 ,  H01G4/012 ,  H01G4/12 ,  H01G4/1209 ,  H01G4/1227 ,  H01G4/1245 ,  H01G4/224 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic main body including an inner layer portion including third ceramic layers and a plurality of inner electrodes arranged at interfaces between the third ceramic layers, and first and second outer layer portions respectively including first and second ceramic layers, the first and second ceramic layers being arranged vertically so as to sandwich the inner layer portion. The third ceramic layers and the first and second outer layer portions contain a perovskite-type compound represented by ABO3 where A contains one or more of Ba, Sr, and Ca, B contains one or more of Ti, Zr, and Hf, and O represents oxygen) as a main component. Where a rare-earth element concentration (CR) in the third ceramic layers is compared to a rare-earth element concentration (Cr) in outermost layer portions including at least outermost surfaces of the first and second outer layer portions, CR>Cr (inclusive of Cr=0).

Abstract translation: 多层陶瓷电容器包括陶瓷主体，其包括内层部分，其包括第三陶瓷层和布置在第三陶瓷层之间的界面处的多个内电极以及分别包括第一和第二陶瓷层的第一和第二外层部分， 并且第二陶瓷层垂直布置以夹住内层部分。 第三陶瓷层和第一外层和第二外层部分含有由ABO 3表示的钙钛矿型化合物，其中A含有Ba，Sr和Ca中的一种或多种，​​B包含Ti，Zr和Hf中的一种或多种，​​O 代表氧）作为主要成分。 在将第三陶瓷层中的稀土元素浓度（CR）与至少包含第一和第二外层部分的最外表面的最外层部分中的稀土元素浓度（Cr）进行比较时，CR> Cr（包括 的Cr = 0）。