Patent ID: 7898793
Filing Date: 2011-03-01
Classification: B32B,C04B,H01B,H01G

Abstract:
1. A multilayer ceramic capacitor comprising a laminate comprising alternately stacked dielectric layers of a sintered compact comprising crystal particles of a dielectric porcelain composite and internal-electrode layers, wherein the dielectric porcelain composite at least comprises a primary constituent comprising barium titanate; a first accessory constituent comprising at least one oxide selected from the group consisting of magnesium oxide (MgO), calcium oxide (CaO), barium oxide (BaO), and strontium oxide (SrO); a second accessory constituent comprising silicon oxide as a major constituent; a third accessory constituent comprising at least one oxide selected from the group consisting of vanadium oxide (V a fourth accessory constituent comprising an oxide of R1, wherein R1 is at least one selected from the group consisting of Sc, Er, Tm, Yb, and Lu; a fifth accessory constituent comprising CaZrO a sixth accessory constituent comprising an oxide of R2 wherein R2 is at least one selected from the group consisting of Y, Dy, Ho, Tb, Gd, and Eu; wherein, in the case of 100 moles of barium titanate, there are 0.1 to 3 moles of the first accessory constituent, 2 to 10 moles of the second accessory constituent, 0.01 to 0.5 moles of the third accessory constituent, 0.5 to 7 moles of the fourth accessory constituent, wherein the number of moles of the fourth accessory constituent is that of R1 alone, more than 0 but not more than 5 moles of the fifth accessory constituent, and more than 0 but not more than 9 moles of the sixth accessory constituent; and the crystal particles of the dielectric layers have an average particle diameter (D wherein a percentage change in the electrostatic capacity before and after aging is within 10% .