| 摘要 |
PCT No. PCT/JP97/01114 Sec. 371 Date Feb. 18, 1998 Sec. 102(e) Date Feb. 18, 1998 PCT Filed Mar. 31, 1997 PCT Pub. No. WO97/41577 PCT Pub. Date Nov. 6, 1997A solid electrolyte layer of dense and uniform conductive polymer is formed with a capacitor element of the wound type in order to provide a solid electrolytic capacitor of improved electric characteristics and large capacity and a process for manufacturing the same. The capacitor element (10) in which an anode foil (1) and a cathode foil (2) are wound by means of a separator (3) is impregnated with a solution mixture of 3,4-ethylendioxythiophene and an oxidizing agent so that the solution mixture is penetrated into the inside of the capacitor element (10) for the gentle polymerization reaction of 3,4-ethylendioxythiophene with an oxidizing agent during and after the impregnation in order to produce polyethylenedioxythiophene for forming a solid electrolyte layer within the capacitor element. Further, a solid electrolytic capacitor in which an electrolytic layer is sufficiently achieved with a low impedance is obtainable. 3,4-ethylendioxythiophene is polymerized by an oxidizing agent in a solution of one or more alcohols which is selected from dihydric alcohol, trihydric alcohol and dihydric alcohol derivatives. Accordingly, the reaction is rapidly enhanced maintaining an improved condition in the polymerizing reaction, and the electrolyte layer having a high degree of polymerization, improved conductivity and adhesive properties to the oxide dielectric layer is formed. |
