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    Dielectric ceramic compositions and electronic devices
    2.
    发明授权
    Dielectric ceramic compositions and electronic devices 有权
    介电陶瓷组合物和电子器件

    公开(公告)号：US06995968B2

    公开(公告)日：2006-02-07

    申请号：US10951941

    申请日：2004-09-29

    申请人： Kazushige Ito ,  Shunichi Yuri ,  Yukie Nakano ,  Mari Miyauchi ,  Takako Hibi ,  Daisuke Iwanaga ,  Masakazu Hosono

    发明人： Kazushige Ito ,  Shunichi Yuri ,  Yukie Nakano ,  Mari Miyauchi ,  Takako Hibi ,  Daisuke Iwanaga ,  Masakazu Hosono

    IPC分类号： H01G4/06

    CPC分类号： H01G4/1227 ,  C04B35/468 ,  H01G4/30

    摘要： In order to provide dielectric ceramic composition having low IR defect rate and high relative dielectric constant even when the multilayer ceramic capacitor is made thinner, dielectric ceramic composition including a main component expressed by a composition formula {{Ba(1-x)Cax}O}A{Ti(1-y-z)ZryMgz}BO2 and subcomponents of Mn oxide, Y oxide, V oxide and Si oxide is provided. In the above formula, A, B, x, y and z are as follows: 0.995≦A/B≦1.020, 0.0001≦x≦0.07, preferably 0.001≦x

    摘要翻译： 为了提供具有低IR缺陷率和高相对介电常数的介电陶瓷组合物，即使当多层陶瓷电容器制得更薄时，包括由组成式{{Ba（1-x） （1-yz）Zr y>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 提供了Mn氧化物，Y氧化物，V氧化物和Si氧化物的次要成分。 在上式中，A，B，x，y和z如下：0.995 <= A / B <= 1.020,0.0001 <= x <= 0.07，优选0.001 <= x <0.05,0.1 <= y < 0.3和0.0005 <= z <= 0.01，优选0.003 <= z <= 0.01。

    Multilayer ceramic capacitor
    3.
    发明授权
    Multilayer ceramic capacitor 有权
    多层陶瓷电容器

    公开(公告)号：US06987662B2

    公开(公告)日：2006-01-17

    申请号：US11043267

    申请日：2005-01-27

    申请人： Takako Hibi ,  Kazunori Noguchi ,  Mari Miyauchi ,  Akira Sato

    发明人： Takako Hibi ,  Kazunori Noguchi ,  Mari Miyauchi ,  Akira Sato

    IPC分类号： H01G4/20 ,  H01G4/06

    CPC分类号： H01G4/30 ,  H01G4/12

    摘要： A multilayer ceramic capacitor 1 having internal electrode layers 3, internal dielectric layers 2 having the thickness of less than 2 μm, and external dielectric layers 20 wherein; the internal dielectric layers 2 and the external dielectric layers 20 include a plural number of dielectric particles 2a, 20a, and when y1 is ratio(D50a/D50b) of D50a and D50b where D50a is an average particle size of dielectric particles 2a included in the internal dielectric layers 2 and D50b is an average particle size of dielectric particles 20a included in the external dielectric layer 20 and located at least 5 μm away from an internal electrode layer 3a, arranged outermost part of all the internal electrode layers, to the stacked direction, and x is thickness of the internal dielectric layer 2, y1 and x satisfy the following equations, y1≦−0.75x+2.275 and y1≧−0.75x+1.675. According to the present invention, even when thickness of internal dielectric layers 2 were made thinner, a multilayer ceramic capacitor 1 wherein improvements in all kinds of electric characteristics, specially an improvement in TC bias characteristic while having sufficient dielectric constant can be expected.

    摘要翻译： 具有内部电极层3，厚度小于2μm的内部电介质层2和外部电介质层20的多层陶瓷电容器1，其中： 内部电介质层2和外部电介质层20包括多个电介质粒子2a，20a，当y1为D50a和D50b的比率（D50a / D50b）时，D50 a是包含在内部电介质层2中的电介质粒子2a的平均粒径，D50b是包含在外部电介质层20中并且位于离内部电极至少5m的电介质粒子20a的平均粒径 层3a，所有内部电极层的最外面的部分为堆叠方向，x为内部电介质层2的厚度，y 1和x满足下列等式：y 1 <= - 0.75×+ 2.275和y 1> = - 0.75x + 1.675。 根据本发明，即使使内部电介质层2的厚度变薄，也可以期望具有各种电特性的改善的多层陶瓷电容器1，特别是具有足够介电常数的TC偏置特性的改善。

    Multilayer ceramic capacitor
    4.
    发明授权
    Multilayer ceramic capacitor 失效
    多层陶瓷电容器

    公开(公告)号：US06975502B2

    公开(公告)日：2005-12-13

    申请号：US11094604

    申请日：2005-03-31

    申请人： Takako Murosawa ,  Mari Miyauchi ,  Kazunori Noguchi ,  Akira Sato

    发明人： Takako Murosawa ,  Mari Miyauchi ,  Kazunori Noguchi ,  Akira Sato

    IPC分类号： H01G4/12 ,  H01G4/30 ,  H01G4/06 ,  H01G4/20

    CPC分类号： H01G4/12 ,  H01G4/30

    摘要： A multilayer ceramic capacitor including an internal electrode layer, an internal dielectric layer having a thickness of less than 2 μm, and an external dielectric layer is provided, wherein the internal dielectric layer and external dielectric layer contain a plurality of dielectric particles, and when assuming that an average particle diameter of the entire dielectric particles in the internal dielectric layer is D50a (unit: μm), an average particle diameter of the entire dielectric particles existing at a position being away at least by 5 μm from the outermost internal electrode layer in the thickness direction is D50b (unit: μm), a ratio (D50a/D50b) of the D50a and D50b is y (no unit), standard deviation of a particle size distribution of the entire dielectric particles in the internal dielectric layer is σ (no unit), and a ratio that dielectric particles (coarse particles) having an average particle diameter of 2.25 times of the D50a exist in the entire dielectric particles is p (unit: %), the y and x satisfy a relationship of y −0.75x+1.740, the σ satisfies σ

    摘要翻译： 提供包括内部电极层，厚度小于2μm的内部电介质层和外部电介质层的多层陶瓷电容器，其中内部电介质层和外部电介质层包含多个电介质颗粒，并且当假定 内部电介质层中的整个电介质颗粒的平均粒径为D50a（单位：mum），存在于距离最外部内部电极层至少离开5μm的位置的整个电介质粒子的平均粒径 厚度方向为D50b（单位：mum），D50a和D50b的比率（D50a / D50b）为y（无单位），内部电介质层中的整个电介质粒子的粒度分布的标准偏差为σ（ 无单位），并且在整个电介质粒子中存在平均粒径为D50a的2.25倍的电介质粒子（粗粒子）的比例 s为p（单位：％），y和x满足y <-0.75x + 2.015和y> -0.75x + 1.740的关系，σ满足σ<0.091，p满足p <2.85％ 即使当内部电介质层变薄时，也可以期望改善TC偏压特性，同时保持各种电特性，特别是足够的介电常数。

    Multilayer ceramic capacitor and its production method
    5.
    发明申请
    Multilayer ceramic capacitor and its production method 有权
    多层陶瓷电容及其制作方法

    公开(公告)号：US20050152095A1

    公开(公告)日：2005-07-14

    申请号：US11030194

    申请日：2005-01-07

    申请人： Yukie Nakano ,  Mari Miyauchi ,  Akira Sato

    发明人： Yukie Nakano ,  Mari Miyauchi ,  Akira Sato

    IPC分类号： C04B35/00 ,  C04B35/46 ,  H01G4/12 ,  H01G4/30 ,  H01G4/06

    CPC分类号： H01G4/30 ,  H01G4/1227 ,  Y10T29/435

    摘要： The invention aims to provide a multilayer ceramic capacitor with high dielectric constant, a high capacitance, and an excellent reliability by eliminating oxygen vacancy in dielectric layers and suppressing oxidation of Ni inner electrodes. The multilayer ceramic capacitor comprises a multilayered dielectric body composed by alternately piling up dielectric layers containing mainly barium titanate and inner electrode layers containing mainly Ni and a first hetero-phase containing Mg—Si—O as constituent elements exists in the capacitor.

    摘要翻译： 本发明旨在通过消除介电层中的氧空位和抑制Ni内电极的氧化来提供具有高介电常数，高电容性和优异可靠性的多层陶瓷电容器。 该多层陶瓷电容器包括多层电介质体，该层叠电介质体主要由主要包含钛酸钡的电介质层和主要含有Ni的内部电极层和含有Mg-Si-O的第一异质相作为构成元素交替堆积而构成。

    Multilayer ceramic capacitor
    6.
    发明授权
    Multilayer ceramic capacitor 失效
    多层陶瓷电容器

    公开(公告)号：US06493207B2

    公开(公告)日：2002-12-10

    申请号：US09887927

    申请日：2001-06-26

    申请人： Yukie Nakano ,  Takako Hibi ,  Mari Miyauchi ,  Daisuke Iwanaga

    发明人： Yukie Nakano ,  Takako Hibi ,  Mari Miyauchi ,  Daisuke Iwanaga

    IPC分类号： H01G4228

    CPC分类号： H01G4/0085 ,  H01G4/30

    摘要： The invention provides a multilayer ceramic capacitor capable of preventing the occurrence of cracks by inhibiting the multilayer capacitor from expanding in a stacking direction and a width direction. The multilayer ceramic capacitor includes a capacitor element (10) in which dielectric layers (11a and 11b) and internal electrodes (12) are alternately stacked. The capacitor element (10) is obtained by stacking and firing a dielectric paste layer and an internal electrode paste layer. An expansion coefficient x in the stacking direction lies between −0.05i% and 0.05i% inclusive, where i denotes the number of dielectric layers (11a), preferably the expansion coefficient x is 0% or less, or more preferably the expansion coefficient x lies between −10% and 0% inclusive. Preferably, an expansion coefficient y in the width direction lies between −0.05i% and 0% inclusive. The expansion coefficients x and y can be controlled by adding a carbon material or a lithium-containing compound to the internal electrode paste layer, or by reducing a thickness of the dielectric layer (11b) located in an outermost portion. Thus, the occurrence of cracks is inhibited, and therefore a fraction defective is reduced.

    摘要翻译： 本发明提供一种能够通过抑制层叠电容器在堆叠方向和宽度方向上扩展来防止发生裂纹的多层陶瓷电容器。 多层陶瓷电容器包括其中电介质层（11a和11b）和内部电极（12）交替堆叠的电容器元件（10）。 电容器元件（10）通过堆叠和烧结电介质浆料层和内部电极浆料层而获得。 叠层方向的膨胀系数x在-0.05i％〜0.05i％的范围内，其中i表示介电层数（11a），优选膨胀系数x为0％以下，更优选膨胀系数x 在-10％至0％之间。 优选地，宽度方向上的膨胀系数y在-0.05％和0％之间。 膨胀系数x和y可以通过向内部电极浆料层中添加碳材料或含锂化合物，或通过减小位于最外部的电介质层（11b）的厚度来控制。 因此，可以抑制裂缝的发生，因此能够降低部分缺陷。

    Multilayer ceramic capacitor and method of producing the same
    10.
    发明申请
    Multilayer ceramic capacitor and method of producing the same 有权
    多层陶瓷电容器及其制造方法

    公开(公告)号：US20060198078A1

    公开(公告)日：2006-09-07

    申请号：US11067715

    申请日：2005-03-01

    申请人： Mari Miyauchi ,  Akira Sato ,  Kaori Shiozawa

    发明人： Mari Miyauchi ,  Akira Sato ,  Kaori Shiozawa

    IPC分类号： H01G4/008

    CPC分类号： H01G4/30 ,  H01G4/008

    摘要： The present invention relates to a multilayer ceramic capacitor comprising: an element main body in which a dielectric layer and an inner electrode layer are alternately laminated, the inner electrode layer comprises: a composite structure having an inner electrode main layer of a base metal; and ceramic particles buried in the inner electrode main layer, therefore the inner electrode layer can be prevented from being interrupted by spheroidizing during the forming of the inner electrode layer, that is, drop of an electrode effective area can be inhibited, and high electrostatic capacity is obtained.

    摘要翻译： 本发明涉及一种层叠陶瓷电容器，其包括：电介质层和内电极层交替层叠的元件主体，所述内电极层包括：具有贱金属内电极主层的复合结构体; 并且埋入内部电极主层中的陶瓷颗粒，因此可以防止内部电极层在形成内部电极层期间被球化中断，即可以抑制电极有效面积的下降，并且高静电容量 获得。