Patent ID: 7754612
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A method for removing material from a semiconductor workpiece, comprising: contacting a polishing pad with a semiconductor workpiece having a surface polysilicon material; disposing a polishing liquid between the polysilicon material and the polishing pad, the polishing liquid containing an oxidizer that does not include metal elements; moving at least one of the semiconductor workpiece and the polishing pad relative to the other while the semiconductor workpiece contacts the polishing pad and the polishing liquid; removing at least some of the polysilicon material while the polysilicon material contacts the oxidizer in the polishing liquid as at least one of the semiconductor workpiece and the polishing pad moves relative to the other; forming a workpiece surface after removing at least some of the polysilicon material from the semiconductor workpiece, the workpiece surface having adsorbed contaminants; and carrying away the adsorbed contaminants from the workpiece surface via deionized water rinsing.