Patent ID: 9682398
Date: 2017-06-20
CPC Classifications: B05C,C30B,H01L

Claim:
1. A process kit, comprising: a first ring that supports a substrate proximate a peripheral edge of the substrate when disposed thereon; a second ring disposed about the first ring; a third ring disposed between the first ring and the second ring, the third ring comprising: a path formed between the second and third rings that allows the first and third rings to rotate with respect to the second ring, wherein the path substantially prevents light from travelling between a first volume disposed below the first, second, and third rings and a second volume disposed above the first, second, and third rings, and wherein the second ring further includes a second inner lip extending radially towards the third ring from an inner surface of the second ring, wherein the path is formed by an overlap of the outer lip and the second inner lip.