Patent ID: 6466421
Filing Date: 2002-10-15
Classification: H01G

Abstract:
A method for producing a solid electrolytic capacitor comprising an oxide dielectric film having provided thereon an electrically conducting polymer composition layer, the method comprising polymerizing a polymerizable monomer compound on an oxide dielectric film by an oxidizing agent, wherein the polymerizable monomer compound is a compound represented by the following general formula (III): wherein R1 and R2 each independently represents any one monovalent group selected from hydrogen, a linear or branched, saturated or unsaturated alkyl group having from 1 to 6 carbon atoms, a linear or branched, saturated or unsaturated alkoxy group having from 1 to 6 carbon atoms, a hydroxyl group, a halogen atom, a nitro group, a cyano group, a trihalomethyl group, a phenyl group and a substituted phenyl group, R1 and R2 may be combined to each other at any position to form at least one divalent chain for forming at least one 5-, 6- or 7-membered saturated or unsaturated ring structure, and X represents a hetero atom selected from S, O, Se, Te or NR3, R3 represents hydrogen, a linear or branched, saturated or unsaturated alkyl group having form 1 to 6 carbon atoms, a phenyl group or a linear or branched, saturated or unsaturated alkoxy group having from 1 to 6 carbon atoms, the alkyl group and the alkoxy group represented by R1, R2 or R3 may optionally contain in the chain thereof a carbonyl bond, an ether bond, an ester bond, an amide bond or an imino bond, and the polymerization reaction takes place in the presence of a compound capable of providing at least one organic anion selected from (1) an alkoxy-substituted naphthalene monosulfonate anion substituted by at least one linear or branched, saturated or unsaturated alkoxy group having from 1 to 12 carbon atoms, (2) a sulfonate anion of a heterocyclic compound having a 5- or 6-membered heterocyclic ring, and (3) an anion of an aliphatic polycyclic compound.