Patent ID: 8491807
Filing Date: 2013-07-23
Classification: C09G,C23F,H01L

Abstract:
1. A polishing method, comprising: polishing a metal film, formed on a surface of an object to be polished, with a polishing pad, to remove at least part of the metal film, in a polishing solution which comprises: oxidizing agent; oxidized-metal dissolving agent; at least one first material selected from the group consisting of benzotriazole and a derivative thereof, the at least one first material being a protective film-forming agent; at least one second material selected from the group consisting of polyacrylic acids, polymethacrylic acids, polyamic acids, ammonium polyacrylates, ammonium polymethacrylates, and ammonium polyamides, the at least one first material and the at least one second material in combination forming a protective film on the metal film; and water, wherein said at least one first material is included in the polishing solution in an amount of from 0.0001 mol to 0.05 mol, based on 100 g of the oxidizing agent, the oxidized-metal dissolving agent, the first and second materials and water, wherein said at least one second material is included in said polishing solution in an amount of 0.001% to 0.3% by weight, based on 100 g of the oxidizing agent, the oxidized-metal dissolving agent, the first and second materials and water, and wherein the protective film, formed from the combination of said at least one first material and said at least one second material, enables control of etching the metal film, while the protective film does not function as a metal surface protecting film against friction by said polishing pad.