Solid electrolyte capacitor

Details Solid electrolyte capacitor Solid electrolyte capacitor

1987-06-12

1988-12-27

Griffin, Donald A.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

H01G 900

Patent

active

047944919

ABSTRACT:
A solid electrolyte capacitor has an anode body made of valve-metal with an anode wire extending from one surface of the body. A dielectric layer is formed on the anode wire and body. A solid electrolyte layer is formed on the dielectric layer. A first conductive layer is formed in a low resistance contact with said solid electrolyte layer. A metal layer is formed on the first conductive layer. A solder layer is formed on the metal layer. According to the invention, the metal layer is an electroless-plated metal layer, and a second conductive layer is positioned between the first conductive layer and the electroless-plated metal layer. This construction prevents a penetration of plating solution. A third conductive layer containing a powder of a plating catalyst may be located between the second conductive layer and the electroless-plated metal layer. A water-repellent insulating resin coating may be formed on the solid electrolyte layer which is located on one surface of this anode body. An end portion of the insulating coating is sandwiched between the first and second conductive layers.

REFERENCES:
patent: 3349294 (1967-10-01), Heinimann et al.
patent: 3516150 (1970-06-01), Leech
patent: 3581159 (1971-05-01), Piper et al.
patent: 4009424 (1977-02-01), Itoh
patent: 4330929 (1982-05-01), Cripe

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