Electronic aluminum foil is a specialized aluminum foil produced from high-purity aluminum ingots through rolling, cleaning, and cutting processes. It serves as a crucial raw material in the manufacturing of aluminum electrolytic capacitors.

The process involves transforming aluminum into foil, followed by surface corrosion and re-oxidation treatments before winding it into a capacitor. The aluminum foil before corrosion is termed "light foil," after corrosion it's known as "corrosion foil," and the final product after re-oxidation is called "finished foil."