Rohm Co., Ltd.

Choujirou Kuriyama

Shinji Nakamura

Eisaku Tanaka

A solid electrolytic capacitor comprising a sintered body made of a valve metal having a terminal wire, a dielectric film, a metallic oxide layer, and a conductive polymer layer formed on the sintered body in this order is described. The polymer layer is so formed that it covers the entire surface of the sintered body. Methods of manufacturing a solid electrolytic capacitor provided with a conductive polymer layer are also described. In the electrolytic polymerization process, the wire attached to the sintered body is used as an anode terminal, and a conductive paste is applied to connect the terminal and a metallic oxide layer electrically over an insulating dielectric film in order for the polymerization to proceed. Electrolytic polymerization is also performed by forming a graphite layer beforehand, a part of which is made in contact with the terminal. Chemical polymerization in an acid environment is applicable, too.

Solid electrolytic capacitor and its manufacturing method

A capacitor apparatus incorporating a fuse incorporates a capacitor device having a first electrode and a second electrode; a fuse whose one end is connected to the first electrode; a first lead terminal connected to the other end of the fuse; a second lead terminal connected to the second electrode; and resin in which the capacitor device, fuse, and a part of the first and second lead terminals are molded. According to such features, fuming and ignition of the capacitor device due to an excessive current therethrough can be prevented without fail.

Growing community of inventors

Kyoto, Japan

Choujirou Kuriyama