Multilayer ceramic capacitor and process for preparing the same

Abstract

The mean grain size (D) of the main crystal phasein the external cover dielectric layersis made larger than the mean grain size (D) of the main crystal phasein the dielectric ceramic layersand the amount of the secondary phase (M) in the external cover dielectric layeris made more than the amount of the secondary phase (M) in the dielectric ceramic layeror the volume proportion of the secondary phaseto the main crystal phasein the external cover dielectric layeris made lower than the volume proportion of the secondary phaseto the main crystal phasein the dielectric ceramic layerThis 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.