Patent ID: 7097782

Claim:
A method of exposing a substrate to a surface microwave plasma, comprising: providing a processing apparatus comprising a processing chamber and an antenna assembly comprising at least two overlapping and movable surface microwave plasma antennas, the antennas having respective pluralities of microwave transmissive openings formed therethrough, at least some of the openings of the respective antennas overlapping with at least some of the openings of another antenna and forming an effective plurality of microwave transmissive openings through the antenna assembly; flowing gas proximate the antennas; passing microwave energy through the effective plurality of openings of the antenna assembly and to the flowing gas effective to form a surface microwave plasma onto a substrate received within the processing chamber; and moving at least one of the antennas relative to another of the antennas to change at least one of size and shape of the effective plurality of openings through the antenna assembly effective to modify microwave energy passed through the antenna assembly to the substrate, the moving being rotational of the at least one antenna about a respective axis eccentric to the at least one antenna.