Patent ID: 8765596
Filing Date: 2014-07-01
Classification: C23C,H01L

Abstract:
1. A method of processing a layer of material on a semiconductor substrate having a recessed feature, the method comprising: (a) depositing a layer of diffusion barrier material on the semiconductor substrate, to coat at least a bottom portion of the recessed feature; and (b) performing a plurality of profiling cycles, after depositing the layer of diffusion barrier material in (a), wherein each profiling cycle comprises a net etching operation removing a first portion of a material residing at the bottom of the recessed feature by resputter and a net deposition operation depositing a second portion of a material at the bottom of the recessed feature, the removed portion of the material being greater than the deposited portion of the material for each of the profiling cycles, and wherein performing the plurality of profiling cycles achieves net material etching at the bottom portion of the recessed feature.