Patent ID: 7465478
Filing Date: 2008-12-16
Classification: H01J,Y10S

Abstract:
1. A method of processing a workpiece, comprising: providing a main reactor chamber having a ceiling gas distribution plate facing a wafer support and side gas injectors below said gas distribution plate, and providing a remote source chamber enclosed separately from the main reactor chamber; evacuating said main reactor chamber and evacuating said remote source chamber; placing a wafer on said wafer support in said main chamber and, while said wafer is on said wafer support, providing a plasma in said main chamber having ions that impinge on said wafer by introducing a process gas through said side gas injectors in said main reactor chamber and applying RF power to external transverse reentrant conduits having chamber entry ports on opposite sides of said main reactor chamber, so as to produce an oscillating plasma current in a closed reentrant path that encircles said gas distribution plate; increasing dissociation of species in said main reactor chamber independently of said RF power, by generating a remote plasma in said remote source chamber and introducing through said ceiling gas distribution plate excited radicals from said remote plasma into said main reactor chamber.