Patent ID: 7413989

Claim:
A method of manufacturing a semiconductor device, comprising: subjecting a semiconductor wafer comprising an underlying layer including an insulating film having at least one recess therein and a metallic material layer formed over a top surface of the underlying layer and filling the recess, on a semiconductor substrate, to a polishing treatment while supplying a basic CMP slurry containing metal ions on the semiconductor wafer to at least partially remove the metallic material layer; and then adding an organic acid which chelates the metal ions to the basic CMP slurry, and conducting polishing, using the organic acid-added CMP slurry, until a surface of the insulating film is exposed, wherein the supply of the basic CMP slurry is stopped after completion of the polishing, and the polished surface of the semiconductor wafer is washed while supplying the organic acid to the polished surface of the semiconductor wafer.