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27 条记录 (耗时 0.016 秒)

    Multilayer ceramic capacitor and method for the manufacture thereof
    1.
    发明授权
    Multilayer ceramic capacitor and method for the manufacture thereof 有权
    多层陶瓷电容器及其制造方法

    公开(公告)号：US06614644B2

    公开(公告)日：2003-09-02

    申请号：US09785064

    申请日：2001-02-15

    申请人： Hirokazu Chazono ,  Hisamitsu Shizuno ,  Hiroshi Kishi

    发明人： Hirokazu Chazono ,  Hisamitsu Shizuno ,  Hiroshi Kishi

    IPC分类号： H01G406

    CPC分类号： H01G4/1209

    摘要： A multilayer ceramic capacitor includes sintered laminated bodies having a plurality of dielectric layers alternately stacked with a multiplicity of internal electrodes, and a pair of external electrodes electrically coupled to the internal electrodes. The dielectric layer is of sintered ceramic grains. The ceramic grains include a core portion surrounded by a shell portion or a solid solution. The ceramic grains contain additive elements such as acceptor elements and/or rare earth elements. The additive elements are non-uniformly distributed in the core and/or shell portion of the ceramic grain or in the solid solution. Such non-uniform distribution of the additive elements in ceramic grains promotes or facilitates the re-oxidation process of the ceramic grains and also increases electrical resistance thereof. Accordingly, the operating life characteristics of the multilayer ceramic capacitors, especially those incorporating therein thin dielectric layers, can be improved. As a result, the thickness of dielectric layers can be further reduced and a greater number of dielectric layers can be used in forming multilayer ceramic capacitors, enabling miniaturization and large capacitance thereof to be achieved.

    摘要翻译： 多层陶瓷电容器包括具有交替层叠有多个内部电极的多个电介质层和电连接到内部电极的一对外部电极的烧结层叠体。 电介质层是烧结陶瓷晶粒。 陶瓷颗粒包括由壳部分或固溶体包围的芯部分。 陶瓷颗粒含有添加元素，例如受主元素和/或稀土元素。 添加剂元素不均匀地分布在陶瓷颗粒的芯部和/或壳部分或固体溶液中。 添加元素在陶瓷颗粒中的这种不均匀分布促进或促进了陶瓷颗粒的再氧化过程，并且还增加了其电阻。 因此，可以提高多层陶瓷电容器的使用寿命特性，特别是那些结合有薄介电层的陶瓷电容器。 结果，可以进一步减小电介质层的厚度，并且可以在形成多层陶瓷电容器中使用更多数量的电介质层，从而实现小型化和大的电容。

    Ceramic capacitor and method for fabricating the same
    3.
    发明授权
    Ceramic capacitor and method for fabricating the same 失效
    陶瓷电容器及其制造方法

    公开(公告)号：US5181157A

    公开(公告)日：1993-01-19

    申请号：US773645

    申请日：1991-10-17

    申请人： Hirokazu Chazono ,  Mutsumi Honda ,  Hirosi Kisi ,  Hirosi Saito ,  Hisamitsu Shizuno

    发明人： Hirokazu Chazono ,  Mutsumi Honda ,  Hirosi Kisi ,  Hirosi Saito ,  Hisamitsu Shizuno

    IPC分类号： C04B35/465 ,  C04B35/468 ,  H01G4/12

    CPC分类号： C04B35/465 ,  C04B35/4682 ,  H01G4/1227 ,  Y10T29/435

    摘要： A ceramic capacitor having excellent electric characteristics which includes internal electrodes essentially comprising a base metal such as Ni, and a method for fabricating the capacitor includes the step of firing under a non-oxidation atmosphere. A dielectric layer of the ceramic capacitor comprises basic and additional components. The basic component comprises a material represented by the following formula:(Ba.sub.k-(x+y) M.sub.x L.sub.y)O.sub.k (Ti.sub.1-z R.sub.z)O.sub.2-l z/2where, M is Mg and/or Zn, L is Ca and/or Sr, R is a rare earth element, and k, x, z and y are numerals fulfilling the conditions of 1.00.ltoreq.k.ltoreq.1.05, 0

    摘要翻译： PCT No.PCT / JP91 / 00396 Sec。 371日期1991年10月17日 102（e）1991年10月17日PCT 1991年3月28日PCT公布。 出版物WO91 / 15023 日期：1991年10月3日。具有优异电特性的陶瓷电容器，其包括基本上包含诸如Ni的贱金属的内部电极，以及制造该电容器的方法包括在非氧化气氛下烧制的步骤。 陶瓷电容器的电介质层包括基本部件和附加部件。 碱性组分包括由下式表示的材料：（Bak-（x + y）MxLy）Ok（Ti1-zRz）O2-lz / 2其中，M是Mg和/或Zn，L是Ca和/或Sr ，R是稀土元素，k，x，z和y是满足1.00≤0.05,0

    Solid dielectric capacitor and method of manufacture
    5.
    发明授权
    Solid dielectric capacitor and method of manufacture 失效

    公开(公告)号：US4999738A

    公开(公告)日：1991-03-12

    申请号：US483079

    申请日：1990-02-21

    申请人： Hiroshi Kishi ,  Hirokazu Chazono ,  Minoru Oshio ,  Hiroshi Saito ,  Toshiya Nakamura ,  Hisamitsu Shizuno

    发明人： Hiroshi Kishi ,  Hirokazu Chazono ,  Minoru Oshio ,  Hiroshi Saito ,  Toshiya Nakamura ,  Hisamitsu Shizuno

    IPC分类号： C04B35/46 ,  C04B35/49 ,  H01G4/12

    CPC分类号： C04B35/49 ,  H01G4/1245

    摘要： A monolithic capacitor having a dielectric ceramic body cosintered with at least two base metal electrodes. The ceramic body is composed of a major ingredient expressed by the formula,(1-.alpha.){(Ba.sub.k-x M.sub.x)O.sub.k TiO.sub.2 }+.alpha.CaZrO.sub.3where M is either or both of calcium and strontium, and .alpha., k and y are numerals in specified ranges. To this major ingredient is added a minor proportion of a mixture of boric oxide, silicon dioxide and at least one metal oxide selected from among barium oxide, strontium oxide, calcium oxide, magnesium oxide and zinc oxide. For the fabrication of capacitors the mixture of the above major ingredient and additives in finely divided form are formed into moldings of desired shape and size, each with at least two electrodes buried therein. The moldings and electrodes are cosintered in a reductive or neutral atmosphere at temperatures of less than 1200.degree. C. and then are reheated at a lower temperature in an oxidative atmosphere.

    Ceramic composition and ceramic capacitor
    6.
    发明授权
    Ceramic composition and ceramic capacitor 有权

    公开(公告)号：US06524983B2

    公开(公告)日：2003-02-25

    申请号：US09893702

    申请日：2001-06-29

    申请人： Yasunobu Kawamoto ,  Koichiro Morita ,  Kenji Saito ,  Hisamitsu Shizuno

    发明人： Yasunobu Kawamoto ,  Koichiro Morita ,  Kenji Saito ,  Hisamitsu Shizuno

    IPC分类号： C04B35468

    CPC分类号： C04B35/4682

    摘要： The ceramic capacitor in accordance with the present invention is fabricated by employing a dielectric ceramic composition in forming dielectric layers thereof, wherein the dielectric ceramic composition contains an oxide of Ba and Ti, an oxide of Re (Re used herein represents one or more rare-earth elements selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Tb and Y) and one or more oxides selected from oxides of Mn, V and Cr, wherein the amount of the oxide of Ba and Ti is 100 mol % in terms of BaTiO3, the amount of the oxide of Re is 0.25 to 1.5 mol % in terms of Re2O3 and the amount of one or more oxides of Mn, V or Cr is 0.03 to 0.6 mol % in terms of Mn2O3, V2O5, Cr2O3, respectively, wherein the ratio of Ba to Ti ranges between 0.970 and 1.030.

    Solid dielectric capacitor and method of manufacture
    7.
    发明授权
    Solid dielectric capacitor and method of manufacture 失效
    固体电介质电容器及其制造方法

    公开(公告)号：US5075819A

    公开(公告)日：1991-12-24

    申请号：US618655

    申请日：1990-11-27

    申请人： Hiroshi Saito ,  Mutsumi Honda ,  Hiroshi Kishi ,  Hisamitsu Shizuno ,  Hirokazu Chazono

    发明人： Hiroshi Saito ,  Mutsumi Honda ,  Hiroshi Kishi ,  Hisamitsu Shizuno ,  Hirokazu Chazono

    IPC分类号： C04B35/49 ,  H01G4/12

    CPC分类号： C04B35/49 ,  H01G4/1245 ,  Y10T29/435

    摘要： A monolithic capacitor having a dielectric ceramic body cosintered with at least two base metal electrodes. The ceramic body is composed of a major ingredient expressed by the formula,(1-.alpha.) {(Ba.sub.k-x M.sub.x)O.sub.k (Ti.sub.1-y R.sub.y)O.sub.2-(y/2) }+.alpha.CaZrO.sub.3where M is either or both of calcium and strontium, R is a rare earth element or elements, and .alpha., k, x and y are numerals in specified ranges. To this major ingredient is added a minor proportion of an additive. The additive is a mixture of boric oxide or lithium oxide, silicon dioxide and at least one metal oxide selected from among barium oxide, strontium oxide, calcium oxide, magnesium oxide and zinc oxide. For the fabrication of capacitors the mixture of the above major ingredient and additives in finely divided form are formed into moldings of desired shape and size, each with at least two electrodes buried therein. The moldings and electrodes are cosintered in a reductive or neutral atmosphere at temperatures of less than 1200 degrees C. and then are heated at a lower temperature in an oxidative atmosphere.

    Multilayer displacement element
    10.
    发明授权
    Multilayer displacement element 有权
    多层位移元件

    公开(公告)号：US07354642B2

    公开(公告)日：2008-04-08

    申请号：US10891070

    申请日：2004-07-15

    申请人： Hisamitsu Shizuno ,  Hirokazu Chazono ,  Hiroshi Kishi

    发明人： Hisamitsu Shizuno ,  Hirokazu Chazono ,  Hiroshi Kishi

    IPC分类号： B23B18/00

    CPC分类号： H01L41/0471 ,  H01L41/0477 ,  H01L41/083 ,  H01L41/1871 ,  H01L41/297 ,  Y10T29/43 ,  Y10T29/435 ,  Y10T428/252

    摘要： A multilayer displacement element is formed by alternately stacking a plurality of ceramic layers and a multiplicity of internal electrodes, wherein each of the ceramic layers is composed of ceramic grains containing barium titanate as a main component and each of the internal electrodes is a metallic film with a mesh shape. The meshed shape of metallic films leads to a reduced contact area between the metallic films and the ceramic layers. Therefore, the displacement of the ceramic layers can be less restricted by the metallic films and thus the amount of displacement of the ceramic layers can be increased. The ceramic grains preferably have an average diameter equal to or larger than 3.5 μm and it is desirable that the ratio of one grain to one layer for the ceramic layer be equal to or larger than 20%.

    摘要翻译： 通过交替地堆叠多个陶瓷层和多个内部电极来形成多层位移元件，其中每个陶瓷层由以钛酸钡为主要成分的陶瓷颗粒组成，并且每个内部电极是具有 网状。 金属膜的网状形状导致金属膜和陶瓷层之间的接触面积减小。 因此，陶瓷层的位移可以较少受金属膜的限制，因此陶瓷层的位移量可以增加。 陶瓷颗粒优选具有等于或大于3.5μm的平均直径，并且理想的是陶瓷层的一个晶粒与一个层的比例等于或大于20％。