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1. 发明授权

US06266230B1 Multilayer ceramic capacitor 失效
标题翻译：多层陶瓷电容器
公开(公告)号：US06266230B1
公开(公告)日：2001-07-24
申请号：US09339521
申请日：1999-06-24
申请人： Junichi Kato , Takuya Ishii , Koji Yoshida , Tsutomu Nishimura , Yoshimasa Yabu
发明人： Junichi Kato , Takuya Ishii , Koji Yoshida , Tsutomu Nishimura , Yoshimasa Yabu
IPC分类号： H01G406
CPC分类号： H01G4/1227
摘要： The present invention provides a multilayer ceramic capacitor in which electrode metal layers and dielectric ceramic layers are laminated alternately and its dielectric constant peak is present at a temperature below −50° C. The multilayer ceramic capacitor is at least one selected from a multilayer ceramic capacitor to be incorporated into an electric circuit in which an electric field of at least 200 V/mm is applied to dielectric layers as a DC bias electric field and an alternating current at a frequency of at least 20 kHz is superimposed and a multilayer ceramic capacitor to be incorporated into an electric circuit in which an electric field of at least 200 V/mm is applied to dielectric layers as an AC electric field. As the dielectric ceramic, a ceramic containing lead atoms whose amount is indicated by being measured in the form of PbO, which is at least 30 mol %, particularly a compound with a perovskite structure represented by ABO3 is used. Thus, an inexpensive large-capacity multilayer capacitor that has thermal resistance and is stable for a high DC bias voltage and a high frequency voltage, and a low loss switching power supply using this capacitor can be provided.
摘要翻译：本发明提供了一种多层陶瓷电容器，其中电极金属层和电介质陶瓷层交替层叠，其介电常数峰值存在于低于-50℃的温度。多层陶瓷电容器是选自多层陶瓷电容器被掺入电路中，其中将至少200V / mm的电场施加到电介质层作为DC偏置电场，并且以至少20kHz的频率的交流电叠加，并将多层陶瓷电容器叠加到被并入到电介质层中施加至少200V / mm的电场作为AC电场的电路中。作为电介质陶瓷，使用含有铅原子的陶瓷，该铅原子的量以PbO的形式测定，其为至少30mol％，特别是由ABO 3表示的具有钙钛矿结构的化合物。因此，可以提供具有耐热性并且对于高直流偏压和高频电压是稳定的便宜的大容量多层电容器，以及使用该电容器的低损耗开关电源。

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