METHOD FOR PRODUCING ALUMINUM ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR EXCELLENT IN ETCHING CHARACTERISTIC, ALUMINUM ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR, AND ALUMINUM ELECTROLYTIC CAPACITOR

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an aluminum electrode material for an electrolytic capacitor excellent in switching characteristics, which can surely increase the expanded surface rate to increase the electrostatic capacitance by forming uniform etched pits in a high density and starting the deep etching from these pits to make coupling hard within a tunnel. SOLUTION: The method for producing the aluminum electrode material includes the steps of: anodizing an aluminum material 1 in such a state as to align the resin spheres 2 on the surface of the aluminum material 1; and exposing outside, the aluminum base material 5 of the fine recessed bottom in which the resin spheres have existed by sequentially or simultaneously removing the resin spheres 2 and the anodized film 3 after anodization and making a peripheral anodized film remain. COPYRIGHT: (C)2011,JPO&INPIT