公开(公告)号：US20160189865A1

公开(公告)日：2016-06-30

申请号：US14945388

申请日：2015-11-18

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Chie KAWAMURA ,  Tetsuo SHIMURA ,  Minoru RYU ,  Koichiro MORITA ,  Yukihiro KONISHI ,  Yoshiki IWAZAKI

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

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  C04B2235/3224 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3418 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/6025 ,  C04B2235/785 ,  H01G4/012 ,  H01G4/12 ,  H01G4/30

Abstract: A multilayer ceramic capacitor has a laminate including dielectric layers laminated alternately with internal electrode layers of different polarities, wherein the dielectric layer contains ceramic grains having Ba, Ti, and X (wherein X represents at least one type of element selected from the group consisting of Mo, Ta, Nb, and W) and a variation in the concentration distribution of X above in the ceramic grain is within ±5%. The multilayer ceramic capacitor can offer excellent service life characteristics even when the thickness of the dielectric layer is 0.8 μm or less, as well as excellent bias characteristics.

Abstract translation: 多层陶瓷电容器具有层叠体，其具有与不同极性的内部电极层交替层叠的电介质层，其中，所述电介质层含有具有Ba，Ti和X的陶瓷颗粒（其中，X表示选自由以下组成的组中的至少一种元素： Mo，Ta，Nb和W），并且陶瓷晶粒中X的浓度分布的变化在±5％以内。 即使介电层的厚度为0.8μm以下，多层陶瓷电容器也能够提供优异的使用寿命特性，以及良好的偏置特性。

公开(公告)号：US20240242885A1

公开(公告)日：2024-07-18

申请号：US18397341

申请日：2023-12-27

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Koichiro MORITA

IPC: H01G4/12 ,  C04B35/468 ,  H01G4/30

CPC classification number: H01G4/1227 ,  C04B35/4682 ,  H01G4/30 ,  C04B2235/3224 ,  C04B2235/3236 ,  C04B2235/3262 ,  C04B2235/365 ,  C04B2235/442

Abstract: A multilayer ceramic electronic device includes internal electrodes, dielectric layers each of which includes a main component, a first subcomponent, a second subcomponent, and a third sub component. The main component includes titanium and includes at least one of barium or calcium. A molar ratio of a sum of barium and calcium to titanium is 1.045 or more and 1.100 or less. The first sub component includes 3 mol or more and 6 mol or less of a rare earth element, with respect to 100 mol of titanium in the dielectric layers. The second sub component includes 3 mol or more and 7 mol or less of manganese, with respect to 100 mol of titanium in the dielectric layers. The third sub component includes 0.6 weight % or more and 2.4 weight % or less of borosilicate glass with respect to each of the plurality of dielectric layers.

公开(公告)号：US20230268130A1

公开(公告)日：2023-08-24

申请号：US18163211

申请日：2023-02-01

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Satoko NAMIKI ,  Koichiro MORITA ,  Minoru RYU ,  Natsumi YUZAKINO

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/012 ,  C04B35/468 ,  C04B35/64 ,  H01G4/008

CPC classification number: H01G4/30 ,  H01G4/1227 ,  H01G4/012 ,  C04B35/4682 ,  C04B35/64 ,  H01G4/008

Abstract: One aspect of the present invention is a multilayer ceramic capacitor including a plurality of dielectric layers composed of a dielectric ceramic containing grains whose main component is barium titanate having a core-shell structure made up of a core part and a shell part, and grains whose main component is calcium titanate having a core-shell structure made up of a core part and a shell part; and a plurality of internal electrodes stacked alternately with each of the plurality of dielectric layers.

公开(公告)号：US20170365412A1

公开(公告)日：2017-12-21

申请号：US15457337

申请日：2017-03-13

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Katsuya TANIGUCHI ,  Koichiro MORITA ,  Minoru RYU ,  Yoshiki IWAZAKI

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

CPC classification number: H01G4/30 ,  H01G4/0085 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and an average grain size in the dielectric layer is 200 nm or less.

公开(公告)号：US20170365411A1

公开(公告)日：2017-12-21

申请号：US15457171

申请日：2017-03-13

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Katsuya TANIGUCHI ,  Koichiro MORITA ,  Minoru RYU ,  Yoshiki IWAZAKI

IPC: H01G4/30 ,  H01G4/12

CPC classification number: H01G4/30 ,  H01G4/0085 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the external electrodes, wherein a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, is within ±20% of an average of the concentrations of the base metal in the five regions, and the dielectric layer has a thickness of 0.6 μm or less.

公开(公告)号：US20170365410A1

公开(公告)日：2017-12-21

申请号：US15457060

申请日：2017-03-13

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Koichiro MORITA ,  Katsuya TANIGUCHI ,  Minoru RYU ,  Yoshiki IWAZAKI

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

CPC classification number: H01G4/30 ,  H01G4/0085 ,  H01G4/012 ,  H01G4/1227 ,  H01G4/2325

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode containing a base metal and coupled to one of the external electrodes; a dielectric layer stacked on the first internal electrode and containing a ceramic material and the base metal; and a second internal electrode stacked on the dielectric layer, containing the base metal, and coupled to another one of the pair external electrodes, a concentration of the base metal in each of five regions, which are equally divided regions of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, being within ±20% of an average of the concentrations of the base metal in the five regions, an average grain number in the dielectric layer being three or less in the stacking direction between the first and second internal electrodes.

公开(公告)号：US20170365405A1

公开(公告)日：2017-12-21

申请号：US15456339

申请日：2017-03-10

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Yoshiki IWAZAKI ,  Katsuya TANIGUCHI ,  Minoru RYU ,  Koichiro MORITA

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

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

Abstract: A multilayer ceramic capacitor includes: a pair of external electrodes; a first internal electrode that is coupled to one of the pair of external electrodes; a dielectric layer that is stacked on the first internal electrode and contains BaTiO3 and Ni; and a second internal electrode that is stacked on the dielectric layer, contains Ni, and is coupled to another one of the pair of external electrodes, wherein Ni is contained in five regions, which are equally divided region of a region between locations 50 nm away from the first and second internal electrodes in a stacking direction between the first and second internal electrodes, and a Ni concentration in at least one of end regions located closest to the first internal electrode and the second internal electrode among the five regions is greater than a Ni concentration in a central region of the five regions by 10% or more.

公开(公告)号：US20230223196A1

公开(公告)日：2023-07-13

申请号：US18079315

申请日：2022-12-12

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Koichiro MORITA

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

CPC classification number: H01G4/2325 ,  H01G4/30 ,  H01G4/248 ,  H01G4/1227

Abstract: A multilayer ceramic electronic device includes a multilayer chip having a plurality of internal electrode layers that face each other and a plurality of dielectric layers, each of which is sandwiched by two of the plurality of internal electrode layers, one end of at least one of the plurality of internal electrode layers being exposed at a side face of the multilayer chip, a first external electrode that is provided on the side face of the multilayer chip, is in contact with at least one of the each end of the plurality of internal electrode layers, and includes ceramic grains, and a second external electrode that is provided on the first external electrode, has a glass, and has a main component that is a same metal as that of the first external electrode.

公开(公告)号：US20230154681A1

公开(公告)日：2023-05-18

申请号：US17974438

申请日：2022-10-26

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Yasuhiro MATSUMOTO ,  Koichiro MORITA ,  Yuta FUSE

IPC: H01G4/12 ,  H01G4/30

CPC classification number: H01G4/1245 ,  H01G4/30

Abstract: A multilayer ceramic electronic device includes a plurality of internal electrode layers that face each other; and a plurality of dielectric layers, each of which is sandwiched by each two of the plurality of internal electrode layers. A main component of the plurality of dielectric layers is barium titanate zirconate. In each of the plurality of dielectric layers, an amount of zirconium is 2 at % or more and 14 at % or less with respect a total amount of titanium and zirconium. Curie point of the plurality of dielectric layers is less than 85 degrees C. An average thickness of each of the plurality of dielectric layers is 1 μm or less.

公开(公告)号：US20180240592A1

公开(公告)日：2018-08-23

申请号：US15892285

申请日：2018-02-08

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Koichiro MORITA

IPC: H01G4/002 ,  H01G4/30 ,  H01G4/012 ,  H01G4/12

Abstract: A multilayer ceramic capacitor includes: a multilayer structure in which each of ceramic dielectric layers and each of internal electrode layers are alternately stacked, the plurality of internal electrode layers being alternately exposed to a first edge face and a second edge face of the multilayer structure, wherein: a region in which a set of internal electrode layers exposed to the first edge face of the multilayer structure face with another set of internal electrode layers exposed to the second edge face of the multilayer structure is a capacity region; at least a part of the circumference region around the capacity region has a protective region of which an average grain diameter of a main component ceramic is larger than that of the capacity region and of which a concentration of a donor element in the main component ceramic is larger than that of the capacity region.