METHOD OF AQUEOUS ANODIZING ALUMINUM SUBSTRATES FOR SOLID CAPACITORS

摘要

A method of anodizing an aluminum substrate comprising heating the substrate to a first temperature of 200 DEG C to about 380 DEG C; suspending the substrate into a first electrolyte and applying a first anodizing current to the first electrolyte; rinsing the substrate; heating the substrate to a second temperature of 200 DEG C to about 380 DEG C; and suspending the substrate into a second electrolyte and applying a second anodizing current to the second electrolyte, wherein the first electrolyte and second electrolyte each comprise an aqueous of at least one salt of alpha-hydroxy acid.