Capacitor

1. A capacitor, comprising:

a dielectric layer made of a dielectric material, having a first main surface, a second main surface opposite to the first main surface, side faces, and a plurality of through-holes that each connect with the first main surface and the second main surface;

a first conductive layer made of a conductive material, disposed on the first main surface of the dielectric layer;

a second conductive layer made of a conductive material, disposed on the second main surface of the dielectric layer;

first inner electrodes made of a conductive material partially filling a first set of through-holes among the plurality of through-holes and directly connected to the first conductive layer;

second inner electrodes made of a conductive material partially filling a second set of through-holes among the plurality of through-holes and directly connected to the second conductive layer;

a first external power electrode layer made of a conductive material, disposed on the first main surface of the dielectric layer and connected to the first conductive layer;

a second external power electrode layer made of a conductive material, disposed on the second main surface of the dielectric layer and connected to the second conductive layer;

a first outer electrode made of a conductive material, disposed on the first external power electrode layer and on at least some of the side faces of the dielectric layer; and

a second outer electrode made of a conductive material, disposed on the second external power electrode layer and on at least some of the side faces of the dielectric layer,

wherein the dielectric layer has a capacitance region distanced from the side faces, and conductive regions, respectively, on both ends of the capacitance region,

wherein said first set of the plurality of through-holes and said second set of the plurality of through-holes are located in the capacitance region, and

wherein subsets of the plurality of through-holes, different from the first and second sets, are located in the respective conductive regions, and are completely filled with a conductive material so as to constitute through-conductor portions, some of the through-conductor portions being exposed on side faces of the dielectric layer.

2. The capacitor according to claim 1 , wherein the conductive materials of the first outer electrode and the second outer electrode are plated metal.

3. The capacitor according to claim 1 ,

wherein the dielectric layer further has an insulating region, provided between the capacitance region and the respective conductive regions, that includes some of the plurality of through-holes; and

wherein said some of the plurality of through-holes located in the insulating region are unfilled or filled with an insulating material so as to constitute insulating portions.

4. The capacitor according to claim 1 , further comprising:

a third external power electrode layer, made of a conductive material, that is disposed on the first main surface and electrically connected to the second external power electrode layer via the through-conductor portions; and

a fourth external power electrode layer, made of a conductive material, that is disposed on the second main surface and electrically connected to the first external power electrode layer via the through-conductor portions.

5. The capacitor according to claim 1 ,

wherein the dielectric layer is made of aluminum oxide; and

wherein the capacitor further comprises:

a first protective layer, including one of epoxy resin, silicone resin, polyimide resin, and polyolefin resin, that covers the first conductive layer; and

a second protective layer, including one of epoxy resin, silicone resin, polyimide resin, and polyolefin resin, that covers the second conductive layer.