公开(公告)号：US06839221B2

公开(公告)日：2005-01-04

申请号：US10786526

申请日：2004-02-25

申请人： Koshiro Sugimoto ,  Osamu Toyama ,  Koji Ishimine ,  Yuichi Komoto ,  Manabu Maeda

发明人： Koshiro Sugimoto ,  Osamu Toyama ,  Koji Ishimine ,  Yuichi Komoto ,  Manabu Maeda

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

CPC分类号： H01G4/30 ,  H01G4/12

摘要： The mean grain size (D2) of the main crystal phase 11 in the external cover dielectric layers 3 is made larger than the mean grain size (D1) of the main crystal phase 11 in the dielectric ceramic layers 7, and the amount of the secondary phase (M2) in the external cover dielectric layer 3 is made more than the amount of the secondary phase (M1) in the dielectric ceramic layer 7, or the volume proportion of the secondary phase 16 to the main crystal phase 11 in the external cover dielectric layer 3 is made lower than the volume proportion of the secondary phase 16 to the main crystal phase 11 in the dielectric ceramic layer 7. This constitution produces the multilayer ceramic capacitor having a large number of thin layers stacked one on another that is capable of suppressing the occurrence of delamination between the external cover dielectric layers and the effective dielectric material section and between the effective dielectric material sections due to the difference in shrinkage by firing even when particle size of the dielectric material powder is made smaller.

摘要翻译： 外层电介质层3中的主晶相11的平均粒径（D2）大于电介质陶瓷层7中的主晶相11的平均粒径（D1），二次 使外部电介质层3的相位（M2）大于介电陶瓷层7中的次级相（M1）的量，或二次相16与主晶相11在外盖中的体积比例 使电介质层3比电介质陶瓷层7中的第二相16的主晶相11的体积比例低。这种结构产生了具有大量层叠的薄层的多层陶瓷电容器， 抑制由于收缩差异而导致的外部电介质层与有效电介质材料部分之间以及有效电介质材料部分之间的分层的发生 即使使电介质材料粉末的粒径更小，也可以进行烧成。