Matsushita Electric Industrial Co., Ltd.

Takuhisa Sugimoto

Kazuo Tadanobu

Yasuhiro Kobatake

Yukihiro Take

Toshikuni Kojima

Kenji Kuranuki

Yoshiaki Yamamoto

Masatoshi Tasei

Masato Ozawa

Kazuya Kawahara

Tomoko Hosokawa

Yoshiro Maruhashi

Masahiro Yabushita

Itsuo Kojima

A solid electrolytic capacitor of the present invention has a structure where respective anode sections of capacitor elements are joined to an anode lead frame by resistance welding via a through hole formed in the anode lead frame. Current thus collects to the through hole during the welding to break a dielectric oxide film layer to expose aluminum foil, and the molten aluminum collects into the through hole. Stable welding work is therefore allowed without splashing the aluminum, and a solid electrolytic capacitor having high welding strength, high reliability, and reduced ESR can be obtained.

Solid electrolytic capacitor and its manufacturing method

A solid electrolytic capacitor having (A) a capacitor element including an oxide layer formed on a part of an outer surface of a valve metal anode body, a solid electrolyte layer formed on the oxide layer layer, and a cathode conductor layer formed on the solid electrolyte layer, and an anode lead out area on a remaining part of the anode body, (B) lead terminals connected to the cathode and the anode lead out area of the capacitor element, and (C) a packaging resin encapsulating the capacitor element with parts of the lead terminals exposed outside. The solid electrolytic capacitor has a first separation strip and a second separation strip formed on a part of the roughened surface layer and also has insulating material on the respective surfaces of the first and the second separation strips.

A disclosure is made on a solid electrolytic capacitor, which facilitates an assembly work with simple construction to lead to a reduction of cost, realizes excellent equivalent series resistance characteristics and makes a thin configuration possible, and a manufacturing method thereof. With the solid electrolytic capacitor of the present invention, a cathode lead frame has a connecting member to connect integrally with a cathode member of a capacitor element stack body on the side surface of a capacitor element extending in the thickness direction thereof. Capacitor elements, each provided with a through hole on an anode member, are stacked on top of each other in layers and connections between capacitor elements are achieved by disposing an anode lead frame between layers. Accordingly, when a plurality of anode members are joined to the anode lead frame via a through hole provided on respective anode members of capacitor elements, stabilized welding work is allowed to be performed without any of molten aluminum foil to be released outside.

Solid electrolytic capacitors and method for manufacturing the same

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Kyoto, Japan

Takuhisa Sugimoto