Solid electrolytic capacitor and method for producing the same

Abstract

A method for producing a solid electrolytic capacitor, comprising coating a solution containing a monomer of an electroconducting polymer and a solution containing an oxidizing agent in repeating sequence on a valve-acting metal anode having formed on the surface thereof an oxide dielectric film, and then polymerizing wherein the electroconducting polymer is formed by setting the humidity in the atmosphere of polymerization process to from 10% to less than 60%.

1 . A method for producing a solid electrolytic capacitor, comprising coating a solution containing a monomer of an electroconducting polymer and a solution containing an oxidizing agent in repeating sequence on a valve-acting metal anode having formed on the surface thereof an oxide dielectric film, and then polymerizing wherein the electroconducting polymer is formed by setting the humidity in the atmosphere of polymerization process to from 10% to less than 60%.  
     
     
         2 . The method for producing a solid electrolytic capacitor as claimed in  claim 1 , wherein said monomer is a monomer for a polymer having electric conductivity, and is selected from a pyrrole, a thiophene, or an aniline.  
     
     
         3 . The method for producing a solid electrolytic capacitor as claimed in  claim 2 , wherein said monomer is 3,4-ethylenedioxythiophene.  
     
     
         4 . The method for producing a solid electrolytic capacitor as claimed in  claim 1 , wherein said oxidizing agent is a metal salt or ammonium salt of an oxidative inorganic acid.  
     
     
         5 . The method for producing a solid electrolytic capacitor as claimed in  claim 4 , wherein said metal salt or ammonium salt of an oxidative inorganic acid is persulfate.