Patent ID: 8338350

Claim:
A semi-aqueous, alkaline cleaning composition for cleaning a multi-metal microelectronic device, the composition consisting of: (a) from about 10% to about 35% water; (b) from about 5% to about 15% of at least one alkanolamine; (c) from about 10% to about 50% solvent selected from the group consisting of N-methylpyrrolidinone or a mixture of N-methylpyrrolidinone and sulfolane; (d) from about 2% to about 10% of gluconic acid or a compound producing gluconic acid by hydrolysis in water; (e) from about 1% to about 8% of at least one oligoethylene glycol of the formula HO(CH 2 CH 2 O) n CH 2 CH 2 OH wherein n is 1 or more; and (f) optionally from about 10% to about 40% of at least one diethylene glycol monoalkyl ether wherein the alkyl group contains from 1 to 4 carbon atoms; wherein the percentages are weight percent based on the total weight of the composition and when the percentage of alkanolamine is equal to or less than 6% the amount of N-methylpyrrolidinone solvent in the composition is 20% or more, and when the percentage of alkanolamine is 9% or more the amount on N-methyl pyrrolidinone may be equal to or less than 20%.