Patent ID: 7300877

Claim:
A method of manufacturing a semiconductor device comprising: forming a first film at least on a part of a semiconductor substrate; forming a second film all over said semiconductor substrate including said first film; and performing a CMP process employing a ceria slurry for planarizing said second film utilizing said first film as a stopper film; wherein said performing said CMP process includes performing a first CMP process until a portion of said first film is exposed and performing a second CMP process thereafter; said first CMP process includes utilizing a first ceria slurry of a predetermined abrasive grain concentration; and said second CMP process includes utilizing a second ceria slurry having a lower abrasive grain concentration than that of said first ceria slurry, wherein said ceria slurry contains an additive constituted of a surfactant, and a concentration of said additive is set to be substantially the same between said first ceria slurry and said second ceria slurry.