Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Hiroshi Shimada

Chiharu Hayashi

Yasuo Kudoh

Toshikuni Kojima

Kenji Akami

Yasue Matsuya

Emiko Igaki

Yasuhiro Kobatake

Kazuo Kawahito

Hisataka Kato

Yasunobu Tsuji

Yoshiki Hashimoto

Tomohide Wada

Mitsuo Terada

A solid electrolytic capacitor includes an anode element made of a valve action metal, a dielectric oxide film formed on a surface of the anode element, a solid electrolytic layer formed on a surface of the dielectric oxide film, and a cathode layer formed on a surface of the solid electrolytic layer. The solid electrolytic layer has an iron concentration not greater than 100 ppm. Alternatively or in combination therewith, a weight fraction of residues in the solid electrolytic layer is smaller than 5 wt %. The polymerization residue is an oxidizing agent and a monomer that is produced when such solid electrolytic layer is formed.

Solid electrolytic capacitor

The basic electric performance is same as or better than the prior art, and moreover occurrence of defective insulation due to the conductive high polymer layer reaching the anode lead-out part is prevented and occurrence of insulation breakdown is also prevented. Still more, the conventional productivity is not sacrificed. The solid electrolytic capacitor having such effects and its manufacturing method are obtained. It includes an anode electrode having a capacitor element part, forbidden band, and an anode lead-out part, a dielectric oxide layer disposed on the surface of the capacitor element part, a conductive high polymer layer disposed on the dielectric oxide layer, a conductor layer disposed on the conductive high polymer layer, an anode terminal electrically connected to the anode lead-out part, and a cathode terminal electrically connected to the conductor layer. The forbidden layer has a boundary portion disposed between the capacitor element part and the anode lead-out part in order to separate into the capacitor element part and anode lead-out part. The anode electrode has at least one undulated layer of roughened layer and porous layer.

Solid electrolytic capacitor, and method of manufacturing the same

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.

Solid electrolytic capacitors comprising a conductive layer made of a polymer of pyrrole or its derivative and method for making the same

A solid electrolytic capacitor is composed of a pair of electrodes and a dielectric film therebetween, wherein one electrode includes a conducting polymer doped with a polyvalent anion and a monovalent anion. The conducting polymer layer may have a multi-layer structure wherein a second or third conductive polymer layer is made of doped thiophene or derivative thereof.

Solid electrolytic capacitors comprising a conductive layer made of a

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Kyoto, Japan

Hiroshi Shimada