초록 ▼

A 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 wh

A 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.

대표청구항 ▼

[ We claim:] [1.] A solid electrolytic capacitor comprising a capacitor element of wound anode and cathode foils with a separator of at least glass paper which is impregnated with a solution mixture of 3,4-ethylenedioxythiophene and an oxidizing agent and the solution mixture penetrated into the sep

[ We claim:] [1.] A solid electrolytic capacitor comprising a capacitor element of wound anode and cathode foils with a separator of at least glass paper which is impregnated with a solution mixture of 3,4-ethylenedioxythiophene and an oxidizing agent and the solution mixture penetrated into the separator is then subjected to a polymerization reaction to form polyethylenedioxythiophene for providing an electrolyte layer which is suspended by the separator.