| 简介 |
PROBLEM TO BE SOLVED : To provide a laminated ceramic capacitor which does not raise such a problem that the electric field intensity of each dielectric layer becomes larger and dielectric breakdowns are apt to occur between internal electrodes and, accordingly, the service life of the capacitor becomes shorter and the reliability of the electric characteristics of the capacitor are deteriorated even when the number of laminated dielectric layers is increased by reducing the thicknesses of the layers with the purpose of reducing the size of the capacitor and increasing the capacitance of the capacitor. SOLUTION : This laminated ceramic capacitor is constituted by integrally laminating a plurality of dielectric layers/composed of sintered bodies of ceramic particles, each of which is composed of a core section and a shell section surrounding the core section, and a plurality of internal electrodes upon another. In the shell section of each particle, one, two, or more kinds of acceptor type elements selected from among Mn, V, Cr, Co, Fe, Ni, Cu, and Mo; Mg; and rare-earth elements (Ho, Sc, Y, Gd, Dy, Er, Yb, Tb, Tm, and LU) are mixed in such a way that the concentrations of the acceptor type elements become higher toward the grain boundary of the particle from the boundary between the core section and shell section. |
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