Patent ID: 8715455

Claim:
A treatment system comprising: a process chamber, including a process space; a radical generation system coupled to said process chamber and configured to receive process gas and produce radicals from said process gas; a gas distribution system configured to receive and distribute a flow of said radicals within said process space, said gas distribution system comprising: a common inlet coupled to an exit of said radical generation system and configured to receive the flow of said radicals, an outlet coupled to said process chamber and having an area which corresponds to a single substrate to be processed in said process chamber, and a dividing member coupled to the gas distribution system and having a first end positioned at said common inlet to define an annular inlet of radius r 1 and a central inlet of radius r 2 , and having a second end connected at said outlet to define an annular outlet of radius r 3 and a central outlet of radius r 4 such that the dividing member separately diverts a portion of the flow of said radicals from said common inlet through one of said central inlet and said annular inlet to a first plenum and out one of said central outlet and said annular outlet to a first region of said area of the outlet, and separately diverts the remaining portion of the flow of said radicals from said common inlet through the other of said central inlet and said annular inlet and to a second plenum, which is isolated from the first plenum, and out the other of said central outlet and said annular outlet to a second region of said area of the outlet, wherein a position of the dividing member is set to a predetermined value r 2 /r 1 and r 4 /r 3 to provide a predetermined distribution of said radicals in each of the first region and the second region in said area of the outlet; a pedestal coupled to said process chamber and configured to support a substrate in said process space of said process chamber and adjust the temperature of said substrate said pedestal having an area which corresponds to said area of the outlet; and a vacuum pumping system coupled to said process chamber and configured to evacuate said process chamber.