ELECTRODE FOIL FOR CAPACITOR AND ELECTROLYTIC CAPACITOR USING THE ELECTRODE FOIL

摘要

An electrode foil for capacitor includes a substrate made of valve metal and a rough-surface layer on the substrate. The rough-surface layer includes a base layer on the substrate and a cover layer on the base layer. The base layer includes first fine particles made of valve metal. The cover layer includes second fine particles made of valve metal. The first fine particles have an average particle diameter larger than that of the second fine particles. This electrode foil has the rough-surface layer that can be produced stably by vapor deposition and provides an electrolytic capacitor having a large capacitance.