| 简介 |
PROBLEM TO BE SOLVED : To provide a laminated ceramic capacitor having a dielectric layer with which a high dielectric constant and high insulation can be obtained even if a diameter of a crystal grain is made small, and to provide a manufacturing method of the capacitor.
SOLUTION : High insulation and the dielectric constant can be satisfied with a dielectric porcelain constituted of a first crystal grain 5A which is mainly composed of titanic acid barium, and whose solution amount of oxide of magnesium, manganese and a rare earth element (at least one type selected from Y, Dy, Ho, Tb and Yb is 0.05 to 0.15 atom%) in depth 20 nm from a grain boundary of the crystal grain obtained by dissolving magnesium, manganese and the rare earth element (at least one type selected from Y, Dy, Ho, Tb and Yb) as oxide; and a second crystal grain 5B whose solution amount of oxide in depth 20 nm from the grain boundary is 0.2 to 0.4 atom%.
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