Application of pure aluminum to prevent pad corrosion

摘要

A method of forming a layer of top level metal within a semiconductor bonding pad that eliminates the formation of surface pitting and surface corrosion that using Prior Art occur due to the presence of minor traces of copper or silicon in that surface. A layer of pure aluminum is deposited on top of the first level metal surface, this level of pure aluminum prevents the occurrence of surface pitting and surface corrosion.