Patent ID: 8889553
Filing Date: 2014-11-18
Classification: C09G,H01L

Abstract:
1. A method for polishing a through-silicon via (TSV) wafer, comprising a step of subjecting a surface of the TSV wafer to a polishing treatment with a polishing composition comprising: an organic alkaline compound; an oxidizing agent selected from a chlorite salt and/or a bromated salt, wherein the oxidizing agent is not hydrogen peroxide; silicon oxide abrasive particles and a solvent, so as to simultaneously remove Si and a conductive material on the TSV wafer, wherein both the conductive material and the Si are removed at rates of about 6,000 Å/min or higher, and wherein the silicon oxide abrasive particles are present in the polishing composition from about 1.25 wt % to about 10 wt %.