Patent ID: 7670436
Filing Date: 2010-03-02
Classification: C23C,H01J,H01L,Y10S

Abstract:
1. A substrate ring assembly for a substrate support, the substrate support having a substrate receiving surface with a periphery and a peripheral edge with a top surface, the assembly comprising: (a) an annular band having (i) a top surface with a circumference, a protrusion and a plurality of concentric grooves which are concentric to a circumference of the annular band, each groove comprising a rounded bottom apex, (ii) an inner perimeter that surrounds the periphery of the substrate receiving surface of the substrate support, and (iii) a foot extending downwardly from the annular band to contact and press against not more than about 70% of the top surface of the peripheral edge of the substrate support, (iv) a recessed surface region extending outwardly from the downwardly extending foot, and over the top corner of the peripheral edge without contacting the peripheral edge of the substrate support, and (v) an opening extending therethrough; and (b) a clamp to secure the annular band to the peripheral edge of the substrate support, the clamp comprising (i) a fastener to pass through the opening and (ii) a locking bracket disposed below the annular band, the locking bracket provided to receive the fastener to lock the clamp to the peripheral edge of the substrate support.