Patent ID: 7348266

Claim:
A method of filling a plurality of nano-sized features using a deposition system that includes a processing chamber, a gas supply system coupled to the processing chamber, an inductively coupled plasma (ICP) source coupled to the processing chamber, a metallic target coupled to the processing chamber, a DC source coupled to the metallic target, a substrate holder coupled to the processing chamber, a RF bias generator coupled to the substrate holder, and a backside gas supply system coupled to the substrate holder, the method comprising: clamping a patterned substrate onto the substrate holder, wherein the substrate holder comprises an electrostatic chuck and an electrostatic force is applied to the patterned substrate; applying a first backside pressure to a backside of the patterned substrate using a backside gas thereby establishing a substrate temperature; creating a first dry-filling plasma during a first dry-filling process, wherein a first amount of metal is deposited at a first rate into a plurality of nano-sized features of the patterned substrate; controlling the first dry-filling plasma during a first shutdown time so as to allow the substrate temperature to decrease; decreasing a thermal conductivity between the substrate holder and the patterned substrate by applying a second backside pressure, wherein the second backside pressure is less than the first backside pressure thereby allowing the substrate temperature to increase; creating a second dry-filling plasma during a second dry-filling process, wherein a second amount of metal is deposited at a second rate into the plurality of nano-sized features of the patterned substrate; and controlling the second dry-filling plasma during a second shutdown time so as to allow the substrate temperature to decrease.