Solid electrolytic capacitors and method for manufacturing the s

Details Solid electrolytic capacitors and method for manufacturing the s Solid electrolytic capacitors and method for manufacturing the s

1991-03-12

1992-08-18

Griffin, Donald A.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

29 2503, H01G 900, H01G 114

Patent

active

051405024

ABSTRACT:
Solid electrolytic capacitors comprise a capacitor element having a valve metal substrate, a dielectric film formed thereon, and a conductive polymer layer formed on the dielectric film. The capacitor element is encased in a resin casing as not directly contacting the element with the resin casing. The capacitance and leakage current characteristics are improved. Alternatively, a capacitor element includes a valve metal substrate, a dielectric film, an inorganic conductive layer and a conductive polymer layer formed on the substrate in this order, wherein the conductive polymer layer is formed after anodization of the inorganic conductive layer bearing substrate. The life of the resulting capacitor is significantly prolonged. This capacitor element may be encased in a resin casing in a manner as set forth above. Methods for manufacturing the solid electrolytic capacitor are also provided.

REFERENCES:
patent: 3148240 (1964-09-01), Harrison
patent: 3648337 (1972-03-01), Greskamp et al.
patent: 4558399 (1985-12-01), Toyama et al.
patent: 4805074 (1989-02-01), Harakawa et al.
patent: 4864472 (1989-09-01), Yoshimura et al.
patent: 4933106 (1990-06-01), Sakai et al.

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