Rubycon Corporation

Akira Iijima

Yoshishige Sakurai

Masayuki Sakaguchi

Tetsushi Ogawara

Yosuke Nozawa

Akihiko Komatsu

Hayato Karasawa

A solid electrolytic capacitor () includes an anode foil () having formed thereon an oxide film, a cathode foil (), and a separator (), and is equipped with a solid electrolyte () formed of an electroconductive polymer compound in a fine particle form, and a water-soluble compound solution () introduced to surround the solid electrolyte (), the solid electrolyte () contains a polyol compound having a molecular weight of less than 200 and a number of hydroxy groups of 4 or more as a first water-soluble compound (), the water-soluble compound solution () contains one kind or multiple kinds of a glycol compound in a liquid form as a second water-soluble compound (), and the second water-soluble compound () has an average molecular weight of less than 400.

Solid electrolytic capacitor with small equivalent series resistance and method for manufacturing the same

Provided is a solid electrolytic capacitor having a lower leakage current than a conventional solid electrolytic capacitor. The solid electrolytic capacitor includes: an anode foil having a surface on which an oxide film is formed; a cathode foil; and a separator disposed between the anode foil and the cathode foil, wherein a solid electrolyte made of a conductive high-molecular weight compound in a fine particle form and a water-soluble high-molecular weight compound solution which is formed of a water-soluble high-molecular weight compound in a liquid form, water and alcohol having a nitro group are introduced into a gap formed between the anode foil and the cathode foil in a state where the water-soluble high-molecular weight compound solution surrounds the solid electrolyte.

Solid electrolytic capacitor and manufacturing method thereof

A solid electrolytic capacitor includes: an anode foil on which an oxide film is formed; a cathode foil; and a separator between the anode and cathode foils, wherein a solid electrolyte in a fine particle form made of a conductive high molecular weight compound and a water-soluble high-molecular weight compound in a liquid form are introduced into a gap between the anode and cathode foils in a state where the water-soluble high-molecular weight compound in a liquid form surrounds the solid electrolyte, and a ratio of an area that the solid electrolyte occupies in the gap is set to a value which falls within a range of 1 vol % to 30 vol %, and a ratio of an area that the water-soluble high-molecular weight compound in a liquid form occupies in the gap is set to a value which falls within a range of 10 vol % to 99 vol %.

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Nagano, Japan

Akira Iijima