Capacitor and manufacturing method thereof

Details Capacitor and manufacturing method thereof Capacitor and manufacturing method thereof

1996-06-26

1998-08-04

Picard, Leo P.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

361524, 361527, 29 2503, H01G 900, H01G 9028

Patent

active

057903689

ABSTRACT:
A capacitor comprising: a porous sintered body 2 consisting mainly of titanium; a dielectric film 3 which is formed on the surface of the sintered body and which consists mainly of a perovskite type composite oxide having a general formula of ATiO.sub.3 ; a conductor or semiconductor which is formed on the surface of the dielectric film; and a counter-electrode which conducts to the conductor or semiconductor and which faces the sintered body; wherein the porosity of the porous sintered body is 20% or more. The capacitor is fabricated by immersing the porous sintered body in an aqueous solution containing strontium or barium, by performing a hydrothermal treatment at a specified temperature to form a composite oxide film having the above-described general formula as a dielectric film 3 on the surface of the sintered body; by forming a conductor or semiconductor electrode 4 on the surface of the oxide film; and by forming a counter electrode which conducts to the electrode and which faces the sintered body.

REFERENCES:
patent: 4419310 (1983-12-01), Burn et al.
patent: 5117333 (1992-05-01), Kakuma et al.
patent: 5144536 (1992-09-01), Tsukadda et al.
patent: 5166759 (1992-11-01), Ueno et al.
patent: 5266079 (1993-11-01), Iga
patent: 5457862 (1995-10-01), Sakata et al.
patent: 5461537 (1995-10-01), Kobayashi et al.

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