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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
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.
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公开(公告)号：US20220384109A1
公开(公告)日：2022-12-01
申请号：US17728130
申请日：2022-04-25
Applicant: TAIYO YUDEN CO., LTD.
Inventor： Hidetoshi MASUDA , Minoru RYU , Teruo ATSUMI
Abstract: A ceramic electronic device includes a multilayer chip in which a plurality of dielectric layers and a plurality of internal electrode layers are stacked. The plurality of internal electrode layers include Au. Each of the plurality of internal electrode layers includes an Au-containing layer of which an Au concentration with respect to all detected elements is 5 at % or more, on an interface between the each of the plurality of internal electrode layers and a dielectric layer next to the each of the plurality of internal electrode layers. A relationship of C≤500×t/T is satisfied when a thickness of the each of the plurality of internal electrode layers is T nm, a thickness of the Au-containing layer is t nm, and an Au concentration with respect to a total of Ni and Au in a whole of the each of the plurality of internal electrode layers is C at %.
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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
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.
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Patent Agency Ranking
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
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.
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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
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.
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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
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.
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公开(公告)号：US20170032895A1
公开(公告)日：2017-02-02
申请号：US15220120
申请日：2016-07-26
Applicant: TAIYO YUDEN CO., LTD.
Inventor： Yoichiro OGATA , Chie KAWAMURA , Tetsuo SHIMURA , Minoru RYU , Yoshiki IWAZAKI
CPC classification number: H01G4/1227 , H01G4/30
Abstract: A multilayer ceramic capacitor includes a laminate constituted by internal electrode layers of different polarities alternately stacked 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, and rare earth R, and the average valence number of Mo in the ceramic grains is 4.18 to 4.60. The multilayer ceramic capacitor can offer excellent service life characteristics and bias characteristics 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具有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， 稀土R，陶瓷晶粒中Mo的平均价数为4.18〜4.60。 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和偏置特性。
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公开(公告)号：US20160293308A1
公开(公告)日：2016-10-06
申请号：US15087651
申请日：2016-03-31
Applicant: TAIYO YUDEN CO., LTD.
Inventor： Minoru RYU , Shinsuke TAKEOKA , Yoko ORIMO , Yoshiki IWAZAKI , Kenji OTAKE
CPC classification number: C22C38/02 , B22F1/02 , C22C38/06 , C22C38/14 , C22C38/28 , C22C38/34 , C22C2202/02 , H01F1/24 , H01F1/33
Abstract: In an embodiment, a magnetic body includes soft magnetic alloy grains 11 containing Fe, element L, and element M (where element L is Si or Zr and element M is a metal element other than Si or Zr that oxidizes more easily than Fe), as well as oxide film produced from oxidization of part of these grains 11; wherein at least some of the bonds between adjacent soft magnetic alloy grains 11 are by way of the oxide film; the oxide film has an inner film 12a, and an outer film 12b positioned on the outer side of the inner film 12a; and the inner film 12a contains more of element L than element M, while the outer film 12b contains more of element M than element L.
Abstract translation: 在一个实施例中，磁体包括含有Fe，元素L和元素M（元素L是Si或Zr，并且元素M是比Fe更容易氧化的Si或Zr以外的金属元素）的软磁性合金晶粒11， 以及由这些晶粒11的一部分的氧化产生的氧化膜; 其中相邻的软磁性合金晶粒11之间的至少一些键合是通过氧化膜; 氧化膜具有内膜12a和位于内膜12a的外侧的外膜12b; 并且内膜12a比元件M包含更多的元件L，而外膜12b包含比元件L更多的元件M.
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