Patent ID: 7745332
Filing Date: 2010-06-29
Classification: H01L

Abstract:
1. A method of filling a recessed feature on a semiconductor substrate with a metal-containing material, the method comprising: (a) depositing a layer of the metal-containing material on the semiconductor substrate, to coat at least a bottom portion of the recessed feature; and (b) performing a plurality of profiling cycles, wherein each profiling cycle comprises a net etching operation removing a first portion of a material residing at the bottom of the recessed feature and a net deposition operation depositing a second portion of a material at the bottom of the recessed feature, wherein the net etching operation comprises redistributing the metal-containing material from the bottom portion of the recessed feature to the sidewalls of the recessed feature in at least some profiling cycles, and wherein performing the plurality of profiling cycles fills the recessed feature with the metal-containing material, wherein removing the first portion of a material residing at the bottom of the recessed feature comprises resputtering the material using high density plasma resputtering in at least some profiling cycles.