Patent ID: 7066787

Claim:
A substrate processing apparatus for polishing a substrate, said substrate processing apparatus comprising: a loading/unloading stage on which a cassette having a plurality of substrates is to be placed; a polishing unit for polishing a substrate, said polishing unit including (i) an edge-portion polisher for pressing a first polishing tape against an edge portion of the substrate and causing relative movement between the first polishing tape and the substrate to polish the edge portion of the substrate; (ii) a bevel-portion polisher for pressing a second polishing tape against a bevel portion of the substrate and causing relative movement between the second polishing tape and the substrate to polish the bevel portion of the substrate, (iii) a notch polisher for pressing a third polishing tape against a notch formed in the substrate and causing relative movement between the third polishing tape and the substrate to polish the notch of the substrate, and (iv) a cleaning device for conducting a primary cleaning of a polished substrate; a transfer robot for transferring a substrate between a cassette, when on said loading/unloading stage, and said polishing unit; and an air supply system for supplying air so that pressure of said loading/unloading stage is greater than pressure of said polishing unit.