Patent ID: 6086642
Filing Date: 2000-07-11
Classification: H01G,Y02E

Abstract:
A fabrication method of a solid electrolytic capacitor, said method comprising the steps of:(a) forming a porous capacitor body by a valve metal;said body serving as an anode of said capacitor;(b) forming an oxide layer of said valve metal to cover a surface of said capacitor body;said oxide layer serving as a dielectric of said capacitor;(c) contacting said capacitor body having said oxide layer with a solution of an oxidizing agent to make said solution adhere to said oxide layer at an operating temperature under an operating pressure;said solution of said oxidizing agent having a viscosity of more than 150 cp to 500 cp at said operating temperature under said operating pressure;(d) drying said solution of said oxidizing agent adhered to said oxide layer to remove a solvent of said adhered solution and to leave said oxidizing agent on said oxide layer;said oxidizing agent left on said oxide layer being in solid phase at said operating temperature under said operating pressure;(e) contacting said capacitor body having said oxide layer with a monomer of a conducting polymer to make said monomer adhere to said oxide layer at said operating temperature under said operating pressure; and(f) polymerizing said monomer of said conducting polymer adhered to said oxide layer by an oxidizing action of said oxidizing agent left on said oxide layer, thereby forming a layer of said conducting polymer on said oxide layer;wherein said steps (c), (d), (e), and (f) are repeated until a desired thickness of said layer of said conducting polymer is accomplished.