Patent ID: 7560384

Claim:
A chemical mechanical polishing method, comprising: chemically and mechanically polishing a polishing target surface by continuously performing a first polishing step and a second polishing step having a polishing rate lower than a polishing rate of the first polishing step, a chemical mechanical polishing aqueous dispersion used in the first polishing step and the second polishing step being a mixture of an aqueous dispersion (I) and an aqueous solution (II), and the polishing rate being changed between the first polishing step and the second polishing step by changing a mixing ratio of the aqueous dispersion (I) and the aqueous solution (II), wherein the aqueous dispersion (I) comprises (A) abrasives and (B) quinolinic acid; wherein the aqueous solution (II) comprises (C) a polishing rate improver; and wherein, when amounts of the aqueous dispersion (I) and the aqueous solution (II) supplied in the first polishing step are respectively denoted by S(I- 1 ) and S(II- 1 ) and amounts of the aqueous dispersion (I) and the aqueous solution (II) supplied in the second polishing step are respectively denoted by S(I- 2 ) and S(II- 2 ) the relationship, S(I- 1 )/S(II- 1 )<S(I- 2 )/S(II- 2 ) is satisfied.