Capacitor

1. A capacitor, comprising:

a dielectric layer having a first plane, and a second plane opposite to the first plane;

a first through-hole communicated with the first plane and the second plane, having difference in level on an inside wall;

a second through-hole communicated with the first plane and the second plane;

a first external conductor layer disposed on the first plane;

a second external conductor layer disposed on the second plane;

a first internal electrode formed in the first through-hole, connected to the first external electrode layer, and separated from the second external electrode layer; and

a second internal electrode formed in the second through-hole, connected to the second external electrode layer, and separated from the first external electrode layer.

2. The capacitor according to claim 1 , wherein the second through-hole having a difference in level on the inside wall.

3. The capacitor according to claim 2 , wherein the first through-hole having a two-staged difference in level on the inside wall, and

the second through-hole having a two-staged difference in level on the inside wall.

4. The capacitor according to claim 1 , wherein the dielectric layer is made of a material that provides the through-hole by anodic oxidation.

5. The capacitor according to claim 4 , wherein the dielectric layer is made of aluminum oxide.