Patent ID: 8481472

Claim:
An aqueous, acidic cleaning composition for cleaning Cu-dual damascene microelectronic structures, the composition comprising a formulation of: (a) from about 68.45% to about 98.95% water; (b) from about 0.3% to about 8% by weight of at least one alkanolamine or aminophenol; (c) from about 0.1% to about 2% of at least one metal chelating agent; (d) from about 0.05% to about 1.6% of at least one tetraalkylammonium fluoride; (e) from about 0.1% to about 5% of hydrogen fluoride; and (f) from greater than 0% to about 15% of at least one non-ionic surfactant that contains ethylene oxide chains or ethylene oxide/ethylene glycol chains; wherein the percentages are weight percent based on the total weight of the formulation and the composition has a pH of from about 4 to about 5.5.