Capacitor and manufacturing method thereof

A capacitor comprising:

• a porous sintered body of titanium metal;
• a dielectric film of a perovskite type composite oxide having a general formula of ATiO.sub.3 where A denotes Ba or Sr or both;
• a conductor or semiconductor on the surface of said dielectric film;
• and a counter-electrode which conducts to said conductor or semiconductor and which faces said sintered body;
• wherein said conductor or semiconductor comprises a conductive polymer material.

A method for manufacturing a capacitor comprising the steps of:

• immersing a porous sintered body of titanium metal in an aqueous solution which has a pH value of about 13 or higher and which contains at least strontium or barium or both at a concentration of about 0.1 mole/l or more of concentration;
• causing a perovskite composite oxide film having a general formula of ATiO.sub.3 where A denotes Ba or Sr or both to form as a dielectric film on the surface of said sintered body;
• forming a conductor or a semiconductor electrode on the surface of said perovskite composite oxide film;
• and forming a counter-electrode which conducts to said conductor or semiconductor electrode and which faces said sintered body.