Patent ID: 8382939
Filing Date: 2013-02-26
Classification: H01J

Abstract:
1. A vacuum processing chamber, comprising: a chamber body having an interior volume; a substrate support pedestal disposed in the interior volume; a lid enclosing the interior volume; a gas distribution plate positioned below the lid and above the substrate support pedestal; a vortex inducing gas inlet oriented to induce a vortex of gas circulating in a plenum around a center line of the chamber body prior to the gas passing through the gas distribution plate; and a vortex confinement ring disposed in the plenum and having a channel plenum aligned with and accepting gas from the vortex inducing gas inlet, wherein the vortex confinement ring further comprises a main body having the channel plenum formed therein, the main body having an inner wall bounding the channel plenum, the inner wall having a plurality of holes allowing fluid communication between the channel plenum and the plenum defined between the gas distribution plate and the lid.