| 简介 |
It is difficult that a laminated ceramic capacitor which has a dielectric ceramic layer being so thin as to have a thickness of about 1 μm secures the reliability as a laminated ceramic capacitor. The dielectric ceramic of the present invention has an empirical formula represented by 100(Ba1-xCax)mTiO3 + aMnO + bCuO + cSiO2 + dMgO + eRO [wherein a coefficient of 100, a, b, c, d or e represents a molar ratio, m represents the molar ratio of (Ba1-xCax) to Ti, and RO represents at least one rare earth metal element oxide selected from among Y2O3, La2O3, 2CeO2, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3 and Lu2O3, wherein m, x, a, b, c, d and e in the above empirical formula satisfy the relationships of 0.998 <= m <= 1.030, 0.04 <= x <= 0.15, 0.01 <= a <= 5, 0.05 <= b <= 5, 0.2 <= c <= 8, 0.05 <= d <= 3.0, and 0.05 <= e <= 2.5, respectively, and wherein it has an average particle diameter of 0.3 to 0.7 μm.
© KIPO & WIPO 2007 |
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