Patent ID: 6726545
Filing Date: 2004-04-27
Classification: B24B

Abstract:
A linear polishing apparatus for polishing a semiconductor substrate, said apparatus comprising:a substrate polishing head for holding, rotating, and oscillating said semiconductor substrate during polishing, and at least two polishing belts forming a continuous loop, said belts having an outside polishing surface and an inside driving surface; said belts are spaced alongside each other and sharing a common axis at each end every belt looped around a pair of rollers, said pair consisting of a driver roller at one axis position, and a driven roller at the other; a platen member interposing said belts is place between pairs of rollers, said platen providing a polishing plane and supporting surface for said polishing belts; said polishing plane having a plurality of holes communicating with separate plenum chambers underlying said plane, said chamber supplies a compressed gas imparting regulated pressures against each polishing belt, and with at least two belts driven separately with variable speed drive motors.