Multilayered ceramic capacitor, mounting structure of circuit board having thereon multilayered ceramic capacitor, packing unit for multilayered ceramic capacitor

摘要

There is provided a multilayered ceramic capacitor, including: a ceramic body; an active layer including a plurality of first and second internal electrodes; an upper cover layer; a lower cover layer formed below the active layer, the lower cover layer being thicker than the upper cover layer; first and second external electrodes; at least one pair of first and second internal electrodes repeatedly formed inside the lower cover layer, wherein, when A is defined as 1/2 of an overall thickness of the ceramic body, B is defined as a thickness of the lower cover layer, C is defined as 1/2 of an overall thickness of the active layer, and D is defined as a thickness of the upper cover layer, a ratio of deviation between a center of the active layer and a center of the ceramic body, (B+C)/A, satisfies 1.063≦(B+C)/A≦1.745.

主权项

1. A multilayered ceramic capacitor, comprising:
a ceramic body having a plurality of dielectric layers laminated therein; an active layer including a plurality of first and second internal electrodes having individual dielectric layers interposed therebetween to form capacitance, the first and second internal electrodes being alternately exposed through respective end surfaces of the ceramic body; an upper cover layer formed above the active layer; a lower cover layer formed below the active layer, the lower cover layer being thicker than the upper cover layer; first and second external electrodes covering both end surfaces of the ceramic body; and at least one pair of first and second internal electrodes repeatedly formed inside the lower cover layer with the dielectric layer interposed therebetween, the first and second internal electrodes being alternately exposed through both end surfaces of the lower cover layer, wherein, when A is defined as 1/2 of an overall thickness of the ceramic body, B is defined as a thickness of the lower cover layer, C is defined as 1/2 of an overall thickness of the active layer, and D is defined as a thickness of the upper cover layer, a ratio of deviation between a center of the active layer and a center of the ceramic body, (B+C)/A, satisfies 1.063≦(B+C)/A≦1.745, wherein when E is defined as an overall thickness of the first and second internal electrodes formed inside the lower cover layer, a ratio of the overall thickness E of the first and second internal electrodes formed inside the lower cover layer to the thickness B of the lower cover layer, E/B, is 0.5 or lower.