Solid electrolytic capacitor and its manufacturing method

Details Solid electrolytic capacitor and its manufacturing method Solid electrolytic capacitor and its manufacturing method

1994-06-22

1995-11-28

Lateef, Marvin M.

Electricity: electrical systems and devices

Electrolytic systems or devices

Solid electrolytic capacitor

361525, 361528, 361539, H01G 900

Patent

active

054713650

ABSTRACT:
A solid electrolytic capacitor comprising a sintered body made of a valve metal having a terminal wire, a dielectric film, a metallic oxide layer, and a conductive polymer layer formed on the sintered body in this order is described. The polymer layer is so formed that it covers the entire surface of the sintered body. Methods of manufacturing a solid electrolytic capacitor provided with a conductive polymer layer are also described. In the electrolytic polymerization process, the wire attached to the sintered body is used as an anode terminal, and a conductive paste is applied to connect the terminal and a metallic oxide layer electrically over an insulating dielectric film in order for the polymerization to proceed. Electrolytic polymerization is also performed by forming a graphite layer beforehand, a part of which is made in contact with the terminal. Chemical polymerization in an acid environment is applicable, too.

REFERENCES:
patent: 4943892 (1990-07-01), Tsuchiya et al.
patent: 5005107 (1991-04-01), Kobashi et al.

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