Patent ID: 6864177
Filing Date: 2005-03-08
Classification: C09G,H01L

Abstract:
1. A method for manufacturing a metal line contact plug of a semiconductor device by a Chemical Mechanical Polishing (CMP) process, the method comprising: (a) performing a first CMP process using a first slurry solution, the first slurry solution comprising 1 to 20 wt % of abrasive, 0.1 to 15 wt % of oxidizer and 0.01 to 10 wt % of complexing agent based on the total weight of the first slurry solution respectively, and having an etching selectivity of more than 10 for a metal/insulating film and a pH ranging from 2 to 9; and (b) performing a second CMP process using a second slurry solution, the second slurry solution comprising 5 to 30 wt % of abrasive and 0.01 to 5 wt % of oxidizer based on the total weight of the second slurry solution respectively, and having an etching selectivity of less than 3 in the metal/insulating film and a pH ranging from 6 to 12.