Patent ID: 7419910

Claim:
A polishing method comprising: contacting a polishing surface of a semiconductor substrate with a polishing pad attached to a turntable; and dropping a CMP slurry onto the polishing pad to polish the polishing surface, the CMP slurry comprising: a Cu oxidizing agent; a complexing agent forming a Cu organic complex; a nonionic surfactant which is incorporated at a concentration of 0.1 wt % or less; an inorganic particle; and a resin particle which is incorporated at a concentration of less than 1 wt %, contains polystyrene, has on the surface thereof a functional group of the same kind of polarity as that of the inorganic particle and has an average particle diameter ranging from 20 to 50 nm, wherein the complexing agent forms a hydrophobic protective film on the polishing surface, and the nonionic surfactant forms a hydrophilic protective film on the hydrophobic protective film.