Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Jyunya Kushizaki

Tatsuji Aoyama

Hiroyuki Matsuura

Hidehiro Sasaki

Yukiya Shimoyama

Yuuki Murata

Kazuyo Saito

A capacitor element includes an anode foil, the first oxide film on a surface of the anode foil, a solid electrolyte layer formed using &#x3c0;-conjugated conductive polymer dispersing material on the first oxide film, and a cathode foil on the solid electrolyte layer. The cathode foil faces the first oxide film across the solid electrolyte layer. An electrolytic capacitor includes the capacitor element, an anode terminal connected to the anode foil, and a second oxide film on a surface of the anode terminal. The second oxide film provided on the anode terminal has higher water repellency than the first oxide film provided on the anode foil. This electrolytic capacitor can reduce a leakage current.

Electrolytic capacitor and method for manufacturing same

An electrolytic capacitor includes a capacitor element and an electrolyte solution impregnated into the capacitor element. The capacitor element includes an anode foil, cathode foil, separator, and a solid electrolytic layer. The anode foil has a dielectric layer on its surface, and the cathode foil confronts the anode foil. The separator is interposed between the anode foil and the cathode foil. The solid electrolytic layer is formed on the surfaces of the anode foil, cathode foil, and separator as an aggregate of fine particles of conductive polymer. The separator has an air-tightness not greater than 2.0 s/100 ml. Sizes of the fine particles measure not greater than 100 nm in diameter, and the fine particles are contained in an amount ranging from 0.3 mg/cmto 1.2 mg/cmconverted to amounts per unit area of the anode foil.

Electrolytic capacitor and method of manufacturing the same

Growing community of inventors

Yamaguchi, Japan

Jyunya Kushizaki