Patent ID: 6679194
Filing Date: 2004-01-20
Classification: H01L,Y10S

Abstract:
A cassette table for supporting a wafer cassette, the cassette table comprising:a top plate; a ground connected to said top plate; and a cassette supporter extending upright on and fixed to said top plate, said cassette supporter including at least one guide block having a configuration corresponding to a side portion of the bottom portion of the cassette so as to guide the cassette into position relative to the top plate, at least one pad having an upper surface having a configuration corresponding to a bottom surface portion of the cassette so as to support the cassette, and a cover electrically conductively connected to said top plate, each said at least one guide block and/or said at least one non-conductive pad comprising a member of electrically non-conductive material, and the cover of electrically conductive material covering said at least one electrically non-conductive guide block and/or said at least one electrically non-conductive pad, whereby static electricity will be discharged from a cassette supported and positioned by the cassette supporter.