Patent ID: 6299689
Filing Date: 2001-10-09
Classification: C23C,H01L,Y10T

Abstract:
A device comprising:a ring shaped clamp having a first surface adapted to contact a wafer to be clamped and a second surface opposite the first surface;a shield having a first surface and a second surface opposite the first surface wherein the first surface of the shield is coupled to the second surface of the clamp and sized so as to shield a surface of a wafer clamped along the first surface of the clamp, wherein the wafer, the clamp and the first surface of the shield enclose an interior region; anda plurality of vents adapted to allow contaminants desorbed from a wafer clamped along the first surface of the clamp to flow from the interior region through the vents to an exterior region;wherein the first surface of the shield comprises a reflector.