Patent ID: 6555510
Filing Date: 2003-04-29
Classification: B01F,C09G,C09K,C10M,C10N,C25D,H01L,Y10T

Abstract:
A method of reducing the surface tension of a solution comprising:a) providing an aqueous solution where a hydrocarbon surfactant would degrade; wherein said aqueous solution is selected from the group consisting of: (i) ammonium fluoride and hydrogen fluoride solution; (iii) an acid copper plating solution comprising copper sulfate and sulfuric acid; (iv) a CMP slurry comprising abrasive particles selected from the group consisting of alumina, silica, and cerium; oxidant, etchant, and corrosion inhibitors; (v) a wafer cleaning solution comprising H2O2, O3, H2SO4, NH4OH, or HCl alone or in combination; (vi) ethylenediamine or ethanolamine solutions; and (vii) chromium trioxide, other chromium (VI) ions, and sulfuric acid; and b) adding to said solution a surface active agent comprising a bis(perfluoroalkanesulfonyl)imide or its salts.