Matsushita Electric Industrial Co., Ltd.

Nobuhiro Hamasaki

Hyogo Hirohata

Masahiro Oita

Koreaki Nakata

Yoshio Iida

Wataru Mizushima

An electroless copper plating solution comprising a copper salt, complexing agent, reducing agent, alkali hydroxide and aliphatic perfluorocarbon-containing non-ionic surface active agent is suitable for producing copper deposition having high ductility and good appearance, and further such a solution is very stable even at a high temperature.

Electroless copper plating solution

A method for making an electrolytic capacitor. A valve metal powder of the sponge type is compressed into a compact body and other usual steps including anodization and electrode application are carried out thereon. Mainly due to the use of sponge type valve metal powder, this method makes it unnecessary to carry out the conventionally employed step of sintering the compact body and produces an electrolytic capacitor having properties better than those obtained by the conventional method. This invention also provides an electrolytic capacitor characterized by the use of sponge type valve metal powder and specific lubricant materials.

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Neyagawa, Japan

Nobuhiro Hamasaki