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    DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC COMPONENT
    12.
    发明申请
    DIELECTRIC CERAMIC COMPOSITION AND ELECTRONIC COMPONENT 有权
    电介质陶瓷组合物和电子元件

    公开(公告)号：US20150274597A1

    公开(公告)日：2015-10-01

    申请号：US14663160

    申请日：2015-03-19

    Applicant: TDK CORPORATION

    Inventor： Nobuto MORIGASAKI ,  Takeru YOSHIDA ,  Tomohisa FUKUOKA ,  Yuhta MATSUNAGA ,  Kazuhiro KOMATSU

    IPC: C04B35/468

    CPC classification number: C04B35/4682 ,  C04B35/638 ,  C04B2235/3206 ,  C04B2235/3215 ,  C04B2235/3224 ,  C04B2235/3236 ,  C04B2235/3239 ,  C04B2235/3262 ,  C04B2235/3418 ,  C04B2235/5445 ,  C04B2235/6562 ,  C04B2235/6565 ,  C04B2235/6567 ,  C04B2235/6584 ,  C04B2235/79 ,  C04B2235/85 ,  H01G4/1227

    Abstract: A dielectric ceramic composition includes at least dielectric particles having a core-shell structure and segregation particles, a concentration of a rare earth compound in the segregation particle is twice or more than an average concentration of the rare earth compound in a shell part of the dielectric particle having the core-shell structure, an area occupied by the segregation particles is 0.1 to 1.1%, when a maximum particle size of the segregation particle is defined as rbmax, a minimum particle size of the segregation particle is defined as rbmin, and an average particle size of the dielectric particle having the core-shell structure is defined as ra, a relation of rbmax/ra≦2.00 and rbmin/ra≧0.25 is satisfied, and the segregation particles substantially do not include Mg.

    Abstract translation: 电介质陶瓷组合物至少包括具有核 - 壳结构和偏析粒子的电介质粒子，偏析粒子中稀土化合物的浓度是电介质的外壳部分中稀土化合物的平均浓度的两倍或更多 具有核 - 壳结构的粒子，由偏析粒子占据的面积为0.1〜1.1％，将分离粒子的最大粒径定义为rbmax时，将分离粒子的最小粒径定义为rbmin，将 具有核 - 壳结构的电介质粒子的平均粒径被定义为ra，满足rbmax / ra＆nlE; 2.00和rbmin /ra≥0.25的关系，并且偏析粒子基本上不包括Mg。

    MULTILAYER ELECTRONIC DEVICE
    13.
    发明公开
    MULTILAYER ELECTRONIC DEVICE 审中-公开

    公开(公告)号：US20240177936A1

    公开(公告)日：2024-05-30

    申请号：US18498794

    申请日：2023-10-31

    Applicant: TDK CORPORATION

    Inventor： Taku MURAKAMI ,  Nobuto MORIGASAKI ,  Takuma ARIIZUMI ,  Yoshitaka NAGASHIMA ,  Tsubasa AOKI

    IPC: H01G4/30 ,  H01G4/008 ,  H01G4/012 ,  H01G4/12

    CPC classification number: H01G4/30 ,  H01G4/008 ,  H01G4/012 ,  H01G4/1227

    Abstract: A multilayer electronic device includes an element body including an interior region and an exterior region and a pair of external electrodes. The interior region includes inner dielectric layers and internal electrode layers laminated alternately. The exterior region is disposed outwards from the interior region in a lamination direction. The pair of external electrodes is disposed on a surface of the element body and connected to the internal electrode layers. DRAa DRBb>DRBc are satisfied, where “RA” includes an element having a highest mole ratio among “RE” in the inner dielectric layers of a third region at a center of the interior region in the lamination direction, “RB” includes an element having a highest mole ratio among “RE” in a first region at a center of the exterior region in the lamination direction, and “RA” and “RB” are different from each other.

    DIELECTRIC COMPOSITION, ELECTRONIC DEVICE, AND MULTILAYER ELECTRONIC DEVICE
    14.
    发明申请
    DIELECTRIC COMPOSITION, ELECTRONIC DEVICE, AND MULTILAYER ELECTRONIC DEVICE 有权

    公开(公告)号：US20220254568A1

    公开(公告)日：2022-08-11

    申请号：US17588582

    申请日：2022-01-31

    Applicant: TDK CORPORATION

    Inventor： Taku MURAKAMI ,  Nobuto MORIGASAKI ,  Takuma ARIIZUMI ,  Toshihiko KANEKO ,  Yasuhiro ITO

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

    Abstract: A dielectric composition includes main-phase particles each including a main component having a perovskite crystal structure represented by a general formula of ABO3. At least a part of the main-phase particles has a core-shell structure. The dielectric composition includes RA, RB, M, and Si. Each of A, B, RA, RB, and M is one or more elements selected from a specific element group. SRA/SRB>CRA/CRB is satisfied, where CRA is an RA content (mol %) to the main component in terms of RA2O3, and CRB is an RB content (mol %) to the main component in terms of RB2O3, in the dielectric composition, and SRA is an average RA content (mol %), and SRB is an average RB content (mol %), in a shell part of the core-shell structure.

    DIELECTRIC CERAMIC COMPOSITION AND MULTILAYER CERAMIC ELECTRONIC COMPONENT
    16.
    发明申请
    DIELECTRIC CERAMIC COMPOSITION AND MULTILAYER CERAMIC ELECTRONIC COMPONENT 审中-公开

    公开(公告)号：US20200039887A1

    公开(公告)日：2020-02-06

    申请号：US16511286

    申请日：2019-07-15

    Applicant: TDK CORPORATION

    Inventor： Takuma ARIIZUMI ,  Toshihiko KANEKO ,  Nobuto MORIGASAKI ,  Yasuhiro ITO

    IPC: C04B35/47 ,  C04B35/468 ,  C04B35/49 ,  H01G4/12 ,  H01G4/30 ,  H01G4/005 ,  C04B35/628

    Abstract: The object of the present invention is to provide a dielectric ceramic composition having even improved insulation specific resistance and highly accelerated lifetime. A dielectric ceramic composition comprising a dielectric particle having a core-shell structure including a main component expressed by a general formula ABO3 (A is Ba and the like; and B is Ti and the like) and a rare earth element component R, in which a shell part of the core-shell structure has an average rare earth element concentration C of 0.3 atom % or more, and a rare earth element concentration gradient S is −0.010 atom %/nm≤S≤0.009 atom %/nm or a rare earth element concentration variation satisfies σ/C≤0.15 (a is a standard deviation of a rare earth element concentration and C is an average rare earth element concentration).

    DIELECTRIC CERAMIC COMPOSITION AND MULTILAYER CERAMIC CAPACITOR
    17.
    发明申请
    DIELECTRIC CERAMIC COMPOSITION AND MULTILAYER CERAMIC CAPACITOR 审中-公开

    公开(公告)号：US20190237254A1

    公开(公告)日：2019-08-01

    申请号：US16230154

    申请日：2018-12-21

    Applicant: TDK CORPORATION

    Inventor： Dan SAKURAI ,  Toshihiko KANEKO ,  Nobuto MORIGASAKI ,  Toshinari TAKAHASHI ,  Yasuhiro ITO

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

    Abstract: The object of the present invention is to provide a dielectric ceramic composition having good properties, particularly good IR property and high temperature accelerated lifetime.The dielectric ceramic composition of the present invention has a main component made of a perovskite type compound expressed by a compositional formula of (Ba1-x-ySrxCay)m(Ti1-zZrz)O3 (note that, m, x, y, and z of the above compositional formula all represent molar ratios, and each satisfies 0.9≤m≤1.1, 0≤x≤0.5, 0≤y≤0.3, 0≤(x+y)≤0.6, and 0.03≤z≤0.3), anda first sub component made of an oxide of a rare earth element R (note that, R is at least one selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu), whereinthe dielectric ceramic composition includes a dielectric particle and a particle boundary, and the dielectric particle include a complete solid solution particle in which Zr is solid dissolved to the entire dielectric particle,when Za represents a concentration of Zr in the dielectric ceramic composition in case a concentration of Ti atom in the dielectric ceramic composition is deemed to be 100 atom % and when Zb represents an average concentration of Zr in the complete solid solution particle in case a concentration of Ti atom in the complete solid solution particle is deemed to be 100 atom %,0.7

    MULTILAYER CERAMIC CAPACITOR
    20.
    发明申请
    MULTILAYER CERAMIC CAPACITOR 审中-公开

    公开(公告)号：US20190237264A1

    公开(公告)日：2019-08-01

    申请号：US16250911

    申请日：2019-01-17

    Applicant: TDK CORPORATION

    Inventor： Dan SAKURAI ,  Toshihiko KANEKO ,  Nobuto MORIGASAKI ,  Toshinari TAKAHASHI ,  Yasuhiro ITO

    IPC: H01G4/30 ,  H01G4/12 ,  H01G4/008

    CPC classification number: H01G4/30 ,  H01G4/008 ,  H01G4/1245

    Abstract: The object of the present invention is to provide the multilayer ceramic capacitor having no deterioration of dielectric properties even in case an inhibitor of an internal electrode layer is pushed out to a dielectric layer when sintering. The multilayer ceramic capacitor 1 including a capacitor element body 10 comprising a dielectric layer 2 and an internal electrode layer 3 stacked in an alternating manner, wherein when Za represents Zr concentration of an dielectric particle in a center part 6 of the dielectric layer 2 and Zb represents Zr concentration of a dielectric particle near the internal electrode layer, 0

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