Dielectric ceramic composition and laminated ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsTakashi Hiramatsu, Tomonori Muraki
Life of this patent
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Abstract
Problem It is difficult to secure the reliability of a laminated ceramic capacitor when the thickness of a dielectric ceramic layer is reduced to about 1 μm. Solving Means The present invention provides a dielectric ceramic composition represented by the chemical composition formula: 100(Ba1-xCax)mTiO3+aMnO+bCuO+cSiO2+dRe2O3 (wherein coefficients 100, a, b, c, and d each represent a molar ratio; and Re represents at least one element selected from Y, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, and Yb), wherein m, x, a, b, c, and d satisfy the respective relationships: 0.990≦m≦1.030, 0.04≦x≦0.20, 0.01≦a≦5, 0.05≦b≦5, 0.2≦c≦8, and 0.05≦d≦2.5.
Claims15
A dielectric ceramic composition represented by the chemical composition formula:
- 100(Ba1-xCax)mTiO3+aMnO+bCuO+cSiO2+dRe2O3 wherein coefficients 100, a, b, c, and d each represent a molar amount;
- Re represents at least one element selected from Y, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb, and wherein m, x, a, b, c, and d satisfy the respective relationships:
- 0.990≦m≦1.030, 0.04≦x≦0.20, 0.01≦a≦5, 0.05≦b≦5, 0.2≦c≦8, and 0.05≦d≦2.5.
Dependencies are inferred from the claim text.