Patent ID: 7700489

Claim:
A method of manufacturing a semiconductor device, comprising: depositing a SiO 2 film on a substrate having a wiring pattern thereon; coating a spin on glass film on the SiO 2 film; and polishing the spin on glass film using slurry containing cerium oxide and cationic surfactant with a chemical-mechanical polishing process, wherein a hydrophobic part of the cationic surfactant contained in the slurry is an oligomer or polymer having a mass average molecular weight of 500 or more, a pH value of the slurry is adjusted to a range of at least 4 but less than 7, and in the polishing the spin on glass film is chemically-mechanically polished selectively relative to the SiO 2 film until the surface of the SiO 2 film and the spin on glass film become level with each other.