| 简介 |
PROBLEM TO BE SOLVED : To provide a multilayer ceramic capacitor having excellent moisture resistance reliability.
SOLUTION : An inner layer ceramic layer 11 has, as a main component, a perovskite compound containing Ba and Ti. The inner layer ceramic layer 11 held by inner electrodes 12, 13 has an electrically active portion 28. Among the portion 28, a connection-vicinity portion 30 (32) between the inner electrode 12 (13) and an outer electrode 20 (22) is subjected to a mapping analysis by an energy dispersive method. In regions 11a and 11b of the mapping image obtained by the analysis, the region 11a and 11b being the region with a distance one-third in a lamination direction from an interface between the inner electrode 12 (13) and the inner layer ceramic layer 11, when a total distance of a ceramic grain boundary detected from the image is defined as L1, a total distance of a grain boundary where rare earth elements are present is defined as L2, and a total distance of a portion where two grain boundaries are overlapped with each other is defined as L3, one grain boundary being where the rare earth elements are present and the other grain boundary being where elements other than Ba, Ca, Sr, Ti, Zr, O, Ni are present, the relational expression : ((L2-L3)/L1)×100≥50 is satisfied.
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