串联式设计小容量MLCC的容量分析  

Analysis on capacitance of low capacitance MLCCs with serial design

作　　者：陆亨 曾雨 彭自冲 宋子峰 祝忠勇 

机构地区：[1]广东风华高新科技股份有限公司,广东肇庆526020

出　　处：《电子元件与材料》2014年第5期42-44,共3页Electronic Components And Materials

摘　　要：为了研究两种不同内电极结构对串联式设计小容量(标称容量≤1 pF)MLCC的容量的影响,作出了这两种内电极结构的等效电路并进行分析,再对具有这两种内电极结构的MLCC的实际样品进行了测试以验证分析结论,结果发现两种样品的实际容量存在显著差异。这种差异可能不利于设计命中率,形成差异的主要原因是MLCC的外电极对具有这两种内电极结构的MLCC的容量的影响程度不同。In order to study the influences of two kinds of internal electrode structures on capacitance of low capacitance （nominal capacitance≤1 pF） MLCCs with serial design, equivalent circuits of the two kinds of internal electrode structures were constructed and analyzed. And then testing on actual MLCCs samples with the two kinds of internal electrode structures was carried out to verify conclusion of the analysis. The results show that there is a remarkable discrepancy in actual capacitance between the two kinds of samples. The discrepancy may be detrimental to design hit rate. The discrepancy is mainly caused by different extent of influence of MLCCs＇ external electrodes on capacitances of MLCCs with the two kinds of internal electrode structures.

关 键 词：多层陶瓷电容器(MLCC) 小容量 设计命中率 串联式设计 内电极 屏蔽 非屏蔽 外电极 

分 类 号：TM28[一般工业技术—材料科学与工程]