Patent ID: 7108753
Filing Date: 2006-09-19
Classification: C23C,C30B

Abstract:
1. A chamber, comprising: a chamber upper wall and a chamber lower wall, each wall having an inner surface and an outer surface and defining an interior space therebetween, said interior space having an inlet and outlet; a plurality of forward ribs provided on the outer surface of at least one of the chamber upper wall and chamber lower wall in a forward portion of the chamber, said forward portion being defined between the inlet and a central axis of rotation of a substrate support; and a plurality of rearward ribs provided on the outer surface of at least one of the chamber upper wall and chamber lower wall in a rearward portion of the chamber, said rearward portion being defined between the outlet and the central axis of rotation of the substrate support; wherein at least some of the forward ribs are positioned to have mirrored projections in the rearward portion of the chamber falling substantially between adjacent rearward ribs, and at least some of the rearward ribs are positioned to have mirrored projections in the forward portion of the chamber falling substantially between adjacent forward ribs.