Solid electrolytic capacitor and manufacturing method thereof

Details Solid electrolytic capacitor and manufacturing method thereof Solid electrolytic capacitor and manufacturing method thereof

2005-05-17

2005-05-17

Thomas, Eric W. (Department: 2831)

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

C361S528000

Reexamination Certificate

active

06894890

ABSTRACT:
A solid electrolytic capacitor has a structure in which a dielectric layer, an electrolyte, a carbon layer, and a metal layer are formed in this order on the surface of an anode. The anode is composed of a porous sinter of tantalum particles. The dielectric layer is composed of a dielectric oxide film formed by anodizing the surface of the anode in an aqueous solution of phosphoric acid, for example. The electrolyte is composed of a conductive polymer, such as polypyrrole or polythiophene. The metal layer is formed by preparing a silver paste by mixing silver particles having an average particle diameter of not larger than 0.05 μm, a protective colloid, and an organic solvent, and applying the silver paste on the surface of the carbon layer, and drying the silver paste at approximately 150° C. or higher.

REFERENCES:
patent: 4463030 (1984-07-01), Deffeyes et al.
patent: 5621608 (1997-04-01), Arai et al.
patent: 20030081373 (2003-05-01), Hamada et al.
patent: 5-315200 (1993-11-01), None
patent: 9-167719 (1997-06-01), None

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