Patent ID: 8337715

Claim:
A CMP slurry for a Cu film comprising: water; 0.03 to 0.3 wt %, based on a total quantity of the slurry, of polyvinylpyrrolidone having a weight average molecular weight of 20,000 or more; 0.05 to 5 wt %, based on the total quantity of the slurry, of an oxidizing agent; a protective film-forming agent containing a first complexing agent for forming a water-insoluble complex and a second complexing agent for forming a water-soluble complex; and colloidal silica having an association degree of 5 or less and a primary particle diameter ranging from 5 to 50 nm, a content of the colloidal silica being confined to a range of 0.05 to 10 wt % based on the total quantity of the slurry, wherein the slurry has a viscosity of 1.1 to 1.9 mPa·sec.