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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYasuo Kudoh, Kenji Akami, Toshikuni Kojima, Yasue Matsuya, Hiroshi Shimada, Chiharu Hayashi
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A solid electrolytic capacitor comprising comprises a pair of electrodes, and a dielectric film provided between the paired electrodes wherein at least one of the paired electrodes comprising a first conductive polymer layer which is made of a polymer of a member selected from the group consisting of pyrrole and derivatives thereof, the first conductive polymer layer being doped with a mixed dopant of a polyvalent anion and a monovalent anion consisting of a sulfonate ion dissociated from an anionic surface active agent. The conductive polymer layer may have a double-layered or a multi-layered structure wherein a second and/or third conductive polymer layer is made of a doped polymer of a thiophene derivative. A method for making the capacitors are also described.
A method for making a solid electrolytic capacitor, which comprises providing an electrode, forming a dielectric film on said electrode, and forming a counter electrode on said dielectric film, wherein said counter electrode comprises a first conductive polymer layer which is formed by chemical polymerization, and is made of a polymer of pyrrole or its derivative doped with a mixed dopant comprising both a polyvalent anion and a monovalent anion comprising a sulfonate anion dissociated from an anionic surface active agent, wherein the mole ratio of polyvalent anion to monovalent anion is 1:9 to 1:999.
Dependencies are inferred from the claim text.