US Patent 11996315 Thin substrate handling via edge clamping

Embodiments of process kits for use in a process chamber are provided herein. In some embodiments, a cover ring for use in a process chamber includes: an annular body that includes an upper surface and a lower surface, an inner lip extending radially inward and downward from the annular body, and a plurality of protrusions extending downward from the inner lip and disposed at regular intervals along the inner lip, wherein lowermost surfaces of the plurality of protrusions together define a planar substrate contact surface.