Cylindrical capacitor

Abstract

The present disclosure provides a cylindrical capacitor. The cylindrical capacitor includes a first electrode, a dielectric layer, and a second electrode. The first electrode has a shape of a hollow cylinder and includes oxidized surface portions, first metal-containing layers, and a first hard layer. The oxidized surface portions are at cylindrical surfaces of the hollow cylinder of the first electrode. The first metal-containing layers are between the oxidized surface portions. The first hard layer is disposed between the first metal-containing layers, and a hardness of the first hard layer is larger than hardnesses of the oxidized surface portions and the first metal-containing layers. The dielectric layer is disposed on the first electrode. The second electrode is disposed on the dielectric layer.

Dependencies are inferred from the claim text.