Journal of Vacuum Science & Technology A, Vol.15, No.6, 3104-3114, 1997
Surface Kinetic-Study of Ion-Induced Chemical-Vapor-Deposition of Copper for Focused Ion-Beam Applications
A systematic surface kinetic study of ion-induced chemical vapor deposition (II-CVD) of Cu from Cu(I) hexafluoroacetylacetonate vinyltrimethylsilane was performed using quartz crystal microbalance mass deposition rate measurements, x-ray photoelectron spectroscopy compositional analysis, and laser-induced thermal desorption coverage measurements in a multibeam scattering apparatus. With the above, a phenomenological surface kinetic model describing the adsorption, deposition (both of the desired source metal and of unwanted impurities), byproduct desorption, and sputtering processes involved in II-CVD was formulated. The surface kinetic modal predicts the deposition rate, composition, and precursor coverage dependencies in agreement with experimental results.