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1. 发明授权

US06829136B2 Dielectric ceramic, method for making the same, and monolithic ceramic capacitor 有权
标题翻译：介电陶瓷及其制造方法，以及单片陶瓷电容器
公开(公告)号：US06829136B2
公开(公告)日：2004-12-07
申请号：US10704831
申请日：2003-11-12
申请人： Tomoyuki Nakamura , Hiroyasu Konakaka , Harunobu Sano
发明人： Tomoyuki Nakamura , Hiroyasu Konakaka , Harunobu Sano
IPC分类号： H01G406
CPC分类号： H01G4/1227 , H01G4/30
摘要： A dielectric ceramic is composed of ABO3 as the main component and a rare earth element, wherein A represents barium which may be partly replaced with at least one of calcium and strontium, and B represents titanium which may be partly replaced with at least one selected from zirconium and hafnium. At least 70% of crystal grains of the dielectric ceramic have a cross-section in which a first region containing dissolved rare earth element occupies 5 to 70% of the area of the cross section and a second region free of the dissolved rare earth element occupies 10 to 80% of the periphery of the cross-section. A monolithic ceramic capacitor having thin dielectric ceramic layers composed of this dielectric ceramic exhibits superior capacitance-temperature characteristics and high reliability.
摘要翻译：电介质陶瓷由ABO3作为主要成分和稀土元素组成，其中A表示钡，可以部分地被钙和锶中的至少一种代替，B代表钛，其可以部分地被至少一种选自锆和铪。介电陶瓷的至少70％的晶粒具有横截面，其中含有溶解的稀土元素的第一区域占截面面积的5至70％，而不含溶解的稀土元素的第二区域占据 10至80％的横截面周边。具有由该介电陶瓷构成的薄介电陶瓷层的单片陶瓷电容器具有优异的电容温度特性和高可靠性。

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