Patent ID: 7621281
Filing Date: 2009-11-24
Classification: C11D

Abstract:
1. A method for cleaning a substrate for semiconductor devices comprising: chemical mechanical polishing a substrate for semiconductor devices which is provided on a partial or whole surface thereof with silicon, transition metals or transition metal compounds, and cleaning the substrate using a cleaning solution, said cleaning solution comprising at least the following components (A), (B) and (C): (A) a polyoxyethylene alkyl ether surfactant containing a hydrocarbon group which may have a substituent group except for phenyl, and a polyoxyethylene group in which a ratio (m/n) of a number (m) of carbon atoms contained in the hydrocarbon group to a repeating number (n) of oxyethylene groups contained in the polyoxyethylene group is in the range of 1 to 1.2, the number (m) of carbon atoms is not less than 9, and in which the number of oxyethylene groups is 7 to 18; (B) water; and (C) an alkali.