Angular distributions of sputtered atoms and the phenamenon of element locally rich relative to microtopographic feature(ELR-MTF) of sputtered target surface have been investigated for Cu-37 at%Ag alloys by means of RBS
SEM and EPMA measurements.In this paper
emphasis will be put on the correlation between surface topography caused by Ar+ ion bombardment with different doses and angular distribution of sputtered atoms ejecting from various micro-zones at topographical surface during sputtering.The experiment result was explained with the so-called ELR-MTF model which can qualitatively interpret the shape of the angular distributions and the variation of the preferential sputtering curves.