PROCESS FOR PRODUCING ALUMINUM ELECTRODE FOIL FOR CAPACITOR AND ALUMINUM FOIL FOR ETCHING

摘要

A process for producing an aluminum electrode foil for a capacitor, comprising a first step of preparing an emulsion from a mixture containing a first phase of a liquid resin or a resin solution of a resin dissolved in a solvent, a second phase of a liquid incompatible with the first phase, and an emulsifier, a second step of coating the emulsion onto the surface of an aluminum foil, a third step of removing the second phase to form a resin film with a plurality of pores on its surface, a fourth step of etching the aluminum foil with the resin film formed thereon, and a fifth step of, after etching, removing the resin film. The production process can form high-density etching pits with high accuracy.