Patent ID: 6723691
Filing Date: 2004-04-20
Classification: C11D,C23G,G03F,H01L

Abstract:
A cleaning solution for cleaning a copper-containing integrated circuit after chemical-mechanical polishing during manufacture of said integrated circuit, the cleaning solution comprising:0.05 wt % to 12.4 wt % a quaternary ammonium hydroxide selected from the group consisting of tetraalkylammonium hydroxide, where the alkyl contains C atoms numbered from 1 to 10, and combinations thereof, 0.2 wt % to 27.8 wt % a polar organic amine selected from the group consisting of monoethanolamine, aminoethylethanolamine, N-methylaminoethanol, aminoethoxyethanol, diethanolamine, triethanolamine, C2-C5 alkanolamines, and combinations thereof, 0.1 wt % to 4.0 wt % of an organic acid being gallic acid 1.0 wt % to 10.9 wt % a corrosion inhibitor selected from the group consisting of ascorbic acid (Vitamin C), L(+)-ascorbic acid, isoascorbic acid, ascorbic acid derivatives, and combinations thereof, balance deionized water and; wherein the alkalinity of the solution is greater than 0.073 milliequivalents base per gram.