Patent ID: 8882565
Filing Date: 2014-11-11
Classification: B24B,H01L

Abstract:
1. A method of polishing a semiconductor wafer comprising: applying a polishing pad to the semiconductor wafer so as to subject the semiconductor wafer to a polishing process, the polishing pad including fixedly bonded abrasives of SiO supplying an aqueous polishing agent solution between the polishing pad and the semiconductor wafer, the aqueous polishing agent solution comprising an alkaline component, being free of solid materials and having a variable pH value in a range of 11 to 13.5; maintaining the aqueous polishing agent solution at a pH value of less than 13 during the polishing process; and increasing the pH value of the aqueous polishing agent solution to a range of 13 to 13.5 so as to end the polishing process.