US 2014/0153156 A1 · MULTILAYERED CERAMIC CAPACITOR AND BOARD FOR MOUNTING THE SAME

Abstract

A multilayered ceramic capacitor includes a ceramic body in which a plurality of dielectric layers having an average thickness of 0.2 to 2.0 μm are stacked; an active layer including a plurality of first and second internal electrodes alternately exposed to both end surfaces of the ceramic body, having the dielectric layer interposed therebetween, to form capacitance; an upper cover layer formed above the active layer; a lower cover layer formed below the active layer and thicker than the upper cover layer; and first and second external electrodes covering both end surfaces of the ceramic body, wherein the dielectric layer is configured of dielectric grains, and when an average thickness of the dielectric layer is defined as td, an average thickness of the first and second internal electrodes is defined as te, and an average grain size of the dielectric grains is defined as Da, Da≦td/3 and 0.2 μm<te<(td)1/2 are satisfied.

Claims14

Dependent claims

A multilayered ceramic capacitor comprising:

a ceramic body in which a plurality of dielectric layers having an average thickness of 0.2 to 2.0 μm are stacked;
an active layer including a plurality of first and second internal electrodes formed to be alternately exposed to both end surfaces of the ceramic body, having the dielectric layer interposed therebetween, to form capacitance;
an upper cover layer formed above the active layer;
a lower cover layer formed below the active layer and being thicker than the upper cover layer;
and
first and second external electrodes formed to cover the both end surfaces of the ceramic body,
wherein the dielectric layer is configured of dielectric grains, and
when an average thickness of the dielectric layer is defined as td (μm), an average thickness of the first and second internal electrodes is defined as to (μm), and an average grain size of the dielectric grains is defined as Da (μm), Da≦td/3 and 0.2 μm<te<(td)1/2 are satisfied.

5 more elements

A board for mounting a multilayered ceramic capacitor, the board comprising:

a printed circuit board having first and second electrode pads formed thereon;
and
a multilayered ceramic capacitor mounted on the printed circuit board,
wherein the multilayered ceramic capacitor includes:
a ceramic body in which a plurality of dielectric layers having an average thickness of 0.2 to 2.0 μm are stacked;
an active layer including a plurality of first and second internal electrodes formed to be alternately exposed to both end surfaces of the ceramic body, having the dielectric layer interposed therebetween, to form capacitance;
an upper cover layer formed above the active layer;
a lower cover layer formed below the active layer and being thicker than the upper cover layer;
and
first and second external electrodes formed on the both end surfaces of the ceramic body and connected to the first and second electrode pads by soldering,
the dielectric layer being configured of dielectric grains, and
when an average thickness of the dielectric layer is defined as td (μm), an average thickness of the first and second internal electrodes is defined as to (μm), and an average grain size of the dielectric grains is defined as Da (μm), Da≦td/3 and 0.2 μm<te<(td)1/2 are satisfied.

9 more elements

Dependencies are inferred from the claim text.

Multilayered ceramic capacitor and board for mounting the same

Life of this patent

Multilayered ceramic capacitor and board for mounting the same

Life of this patent

Abstract

Claims14