Patent ID: 6206760
Filing Date: 2001-03-27
Classification: B24B

Abstract:
A method of preventing particle contamination in a polishing machine utilizing slurry comprising the steps of:providing at least one polishing head mounted in at least one spindle for holding at least one substrate having a surface to be polished in a face-down position,providing at least one polishing disc for holding a polishing pad having a frictional surface in a face-up position,pressing said surface of the substrate against said frictional surface of the polishing pad while said at least one polishing head and said at least one polishing disc rotate in opposite directions,dispensing a particle-containing slurry inbetween said substrate surface and said frictional surface, anddispensing a cleaning solvent on said at least one spindle for preventing accumulation of said particle-containing slurry on vertical and horizontal surfaces of said at least one spindle.