公开(公告)号：US20170365409A1

公开(公告)日：2017-12-21

申请号：US15457026

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 the base metal and a ceramic material mainly composed of barium titanate; 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 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 atomic concentration ratio of Mg to Ti is 0 or greater and less than 0.002 in the dielectric layer.

公开(公告)号：US20170345564A1

公开(公告)日：2017-11-30

申请号：US15600609

申请日：2017-05-19

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Minoru RYU ,  Mikio TAHARA ,  Hirokazu ORIMO

IPC: H01G4/12 ,  H01G4/10 ,  H01G4/30 ,  H01G4/005 ,  H01M4/32

CPC classification number: H01G4/1209 ,  H01G4/005 ,  H01G4/0085 ,  H01G4/10 ,  H01G4/12 ,  H01G4/2325 ,  H01G4/30 ,  H01M4/32

Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a first external electrode 12 and a second external electrode 13 that each contain metal grains MP and dielectric grains DP, where an oxide of the same metal element constituting the metal grain MP, or MO, is present at the interface between the metal grain MP and the dielectric grain DP. The multilayer ceramic capacitor can prevent the hardness of its external electrodes from dropping, even when the external electrodes contain metal grains and dielectric grains.

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：US20220392708A1

公开(公告)日：2022-12-08

申请号：US17745194

申请日：2022-05-16

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Minoru RYU ,  Yoshiki IWAZAKI

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

Abstract: A ceramic electronic device includes a multilayer structure in which each of a plurality of dielectric layers and each of a plurality of internal electrode layers are alternately stacked, a main component of the plurality of dielectric layers being a ceramic having a perovskite structure expressed by a general formula ABO3. At least one of crystal grains of the plurality of dielectric layers has a core-shell structure. A dispersion of atomic displacement amounts between B site atoms and oxygen atoms of a shell of the core-shell structure is larger than a dispersion of atomic displacement amounts between B site atoms and oxygen atoms of a core of the core-shell structure.

公开(公告)号：US20170365406A1

公开(公告)日：2017-12-21

申请号：US15456368

申请日：2017-03-10

Applicant: TAIYO YUDEN CO., LTD.

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

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 concentrations obtained by analyzing five regions with a transmission electron microscope are within a range from 0.015 to 0.045, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first internal electrode and the second internal electrode equally into five.

公开(公告)号：US20170365408A1

公开(公告)日：2017-12-21

申请号：US15456991

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 ,  H01G4/012 ,  H01G4/1227 ,  H01G4/232 ,  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 pair 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 thicknesses of the first internal electrode and the second internal electrode are 0.2 μm or greater.

公开(公告)号：US20170365407A1

公开(公告)日：2017-12-21

申请号：US15456962

申请日：2017-03-13

Applicant: TAIYO YUDEN CO., LTD.

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

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 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 is within ±20% of an average of the concentrations of the base metal in the five regions, the five regions being obtained by dividing a region from a location 50 nm away from the first internal electrode of the dielectric layer to a location 50 nm away from the second internal electrode of the dielectric layer in a stacking direction between the first and second internal electrodes equally into five.

公开(公告)号：US20170345567A1

公开(公告)日：2017-11-30

申请号：US15600615

申请日：2017-05-19

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Daisuke SAKATE ,  Sadanori SHIMODA ,  Fumi TANIGUCHI ,  Minoru RYU

IPC: H01G4/12 ,  H01G4/005 ,  H01G4/30 ,  H01G4/10 ,  H01M4/46

CPC classification number: H01G4/1218 ,  H01G4/005 ,  H01G4/10 ,  H01G4/1209 ,  H01G4/30 ,  H01M4/463 ,  H01M4/466

Abstract: In an embodiment, a multilayer ceramic capacitor 10 has a capacitor body comprising a capacitive part 11a constituted by multiple internal electrode layers 11al that are stacked with dielectric layers 11a2 in between, as well as dielectric cover parts 11b that respectively cover both sides of the capacitive part 11a in the stacking direction. Also, the dielectric layers 11a2 of the capacitive part 11a, and the dielectric cover parts 11b, contain elemental manganese, and the elemental manganese is distributed in such a way that its quantity gradually decreases in the depth direction from the exterior faces of the dielectric cover parts 11b toward the center of the dielectric layers 11a2 of the capacitive part 11a.

公开(公告)号：US20170152187A1

公开(公告)日：2017-06-01

申请号：US15364175

申请日：2016-11-29

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Kunihiko NAGAOKA ,  Kazumichi HIROI ,  Minoru RYU ,  Chie KAWAMURA

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

CPC classification number: C04B35/4682 ,  C01G23/006 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2002/74 ,  C01P2002/85 ,  C01P2004/62 ,  C01P2006/12 ,  C04B35/62675 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3232 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3251 ,  C04B2235/3256 ,  C04B2235/3258 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/785 ,  H01G4/005 ,  H01G4/1227 ,  H01G4/30

Abstract: Dielectric layers are prepared using a dielectric material that contains a ceramic powder having Ba, Ti, and additive element X which is solid-solubilized and is at least one element selected from the group consisting of Mo, Ta, Nb, and W, wherein the standard deviation of the ratio of the peak intensity of the additive element X (XKα) measured by STEM-EDX, and the sum of the peak intensity of the Ti and peak intensity of the Ba (BaLα+TiKα) measured by STEM-EDX, is less than 10.5% of the average ratio as measured at a total of five points including the three points that divide the maximum diameter of one grain of the ceramic powder into four equal parts, and two excluding the center point of the three points that divide the diameter crossing at right angles with the maximum diameter at its center point, into four equal parts.

公开(公告)号：US20170032894A1

公开(公告)日：2017-02-02

申请号：US15220064

申请日：2016-07-26

Applicant: TAIYO YUDEN CO., LTD.

Inventor： Chie KAWAMURA ,  Yoichiro OGATA ,  Tetsuo SHIMURA ,  Minoru RYU ,  Yoshiki IWAZAKI

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

CPC classification number: H01G4/1227 ,  H01G4/30

Abstract: A multilayer ceramic capacitor includes a laminate constituted by internal electrode layers of different polarities alternately layered via dielectric layers, wherein the multilayer ceramic capacitor is such that the dielectric layers contain ceramic grains whose primary component is BaTiO3, the ceramic grains contain Mo, Mn, rare earth R, and at least one of V and W, and the average valence number of Mo in the ceramic grains is 4.50 to 5.50. The multilayer ceramic capacitor can offer excellent service life characteristics and sufficiently suppress leak current even when the thickness of the dielectric layer is 0.8 μm or less.

Abstract translation: 多层陶瓷电容器包括由电介质层交替层叠的不同极性的内部电极层构成的层叠体，其中，所述多层陶瓷电容器使得所述电介质层含有主要成分为BaTiO 3的陶瓷晶粒，所述陶瓷粒子含有Mo，Mn，稀有金属 土R，以及V和W中的至少一个，陶瓷晶粒中Mo的平均价数为4.50〜5.50。 即使当电介质层的厚度为0.8μm以下时，多层陶瓷电容器也能够提供优异的使用寿命特性，并充分抑制漏电流。