Patent ID: 6860801
Filing Date: 2005-03-01
Classification: B24B

Abstract:
1. A pedestal of a load-cup for supporting a wafer as it is loaded/unloaded onto/from a chemical mechanical polishing (CMP) apparatus, the pedestal comprising: a pedestal plate dedicated to support a wafer; a pedestal support column extending from the bottom of and supporting said pedestal plate; and a pedestal film fixed to the upper surface of said pedestal plate; said pedestal support column having a vertical passageway extending therein, said pedestal plate having a plurality of fluid ports extending through said upper surface, and an internal passageway extending therein and connecting said fluid ports to the vertical passageway in said pedestal support column, and said pedestal film extending over only a portion of the entire upper surface of said pedestal plate, which portion include areas each extending completely around said fluid ports such that said film comprises at least one film member extending completely around said fluid ports, and said pedestal film offering an area of contact for a wafer supported thereon that is substantially less than the area of the upper surface of the pedestal plate.