Patent ID: 7795138

Claim:
A method of depositing a metal seed layer on a wafer substrate comprising a plurality of recessed device features, the method comprising: (a) depositing a first portion of the metal seed layer on the wafer substrate via plasma deposition, wherein the first portion includes bottom coverage in each of the plurality of recessed device features, the first portion is deposited using metal ions generated in a plasma, and wherein the first portion is deposited using a first ratio of wafer substrate RF bias to DC source power that is low enough to inhibit resputtering; and (b) after depositing the first portion of the metal seed layer, depositing a second portion of the metal seed layer, while simultaneously redistributing at least part of the first portion on the bottom of each of the plurality of recessed device features to the corresponding sidewalls of each of the plurality of recessed features, wherein the second portion is deposited using a second ratio of wafer substrate RF bias to DC source power that is higher than the first ratio of wafer substrate RF bias to DC source power, such that resputtering is not inhibited.