Nanoelectronic and microelectronic cleaning compositions for cleaning nanoelectronic and microelectronic substrates under
supercritical fluid state conditions, and particularly cleaning compositions useful with and having improved compatibility with nanoelectronic and microelectronic substrates characterized by
silicon dioxide, sensitive low-κ or high-κ dielectrics and
copper,
tungsten,
tantalum,
nickel, gold,
cobalt,
palladium,
platinum,
chromium,
ruthenium,
rhodium,
iridium,
hafnium,
titanium,
molybdenum,
tin and other metallization, as well as substrates of Al or Al(Cu) metallizations and advanced interconnect technologies, are provided by nanoelectronic and microelectronic cleaning compositions comprising nanoelectronic and microelectronic cleaning compositions of this invention are provided by compositions comprising: (1) a supercritical main fluid reaching a
supercritical fluid state at a temperature of 250° C. or less and a pressure of 600 bars or less (592.2 atm, 8702.3 psi), and (2) as a secondary fluid, a modifier formulation selected from the following formulations: a) a formulation comprising: an
oxidizing agent; a polar
organic solvent selected from the group consisting of amides, sulfones, sulfolenes, selenones and saturated alcohols; and optionally other components; b) a
silicate free formulation comprising: a polar
organic solvent selected from the group consisting of amides, sulfones, selenones and saturated alcohols; a strong alkaline base; and optionally other components; c) a formulation comprising: from about 0.05% to 30% by weight of one or more non-
ammonium producing strong base containing non-nucleophilic, positively charged counter ions; from about 0.5 to about 99.95% by weight of one or more
corrosion inhibiting
solvent compounds, said
corrosion inhibiting
solvent compound having at least two sites capable of complexing with metals; and optionally other components; d) a formulation comprising: from about 0.05 to 20% by weight of one or more non-
ammonium producing, non-HF producing
fluoride salt; from about 5 to about 99.95% by weight of water,
organic solvent or both water and organic
solvent; and optionally other components; and e) a formulation comprising: from about 0.05% to 30% by weight of one or more non-
ammonium producing strong base containing non-nucleophilic, positively charged counter ions; from about 5 to about 99.95% by weight of one or more steric hindered
amide solvents; and optionally other components.