Patent ID: 9322097
Filing Date: 2016-04-26
CPC Classification: C23C

Claim Text:
1. A base ring assembly for a substrate processing chamber, comprising: a ring body to be disposed within an inner circumference of the substrate processing chamber, the ring body comprising: an upper ring disposed within the upper trench of the ring body, the upper ring and the upper trench define a first annular fluid flow path therebetween, wherein the ring body further comprises a top wall extending upwardly from the top surface of the ring body, the top wall is disposed around an inner circumference of the ring body; and an outer portion of the to wall and an inner portion of the upper ring defines a to annular trench for placement of an O-ring; and a lower ring disposed within the lower trench of the ring body, the lower ring and the lower trench define a second annular fluid flow path therebetween, wherein the ring body further comprises a bottom wall extending downwardly from the bottom surface of the ring body, the bottom wall is disposed around an inner circumference of the ring body; and an outer portion of the bottom wall and an inner portion of the lower ring defines a bottom annular trench for placement of an O-ring, and wherein the upper ring and the lower ring are individual pieces separated from the upper trench and the lower trench, respectively, and the upper ring, the lower ring, and the ring body, once assembled, are generally concentric or coaxial.