Patent ID: 7005384

Claim:
A chemical mechanical polishing method for polishing a low-k material insulating layer formed on a semiconductor wafer, which method comprises: preparing an aqueous abrasive slurry composed of a water component, an abrasive component, a first additive for making the low-k material insulating layer of said semiconductor wafer hydrophilic in nature, and a second additive for adding acidity to said aqueous abrasive slurry, wherein said low-k material insulating layer is formed as a SiCOH layer or as a methyl silsesquioxane layer; feeding said aqueous abrasive slurry to a rotating polishing pad; and applying and pressing the low-k material insulating layer of said semiconductor wafer onto said rotating polishing pad washing said semiconductor wafer, which is drenched with said aqueous abrasive slurry, with an aqueous washing solution; and rinsing the washed semiconductor wafer.