Patent ID: 6783695
Filing Date: 2004-08-31
Classification: G03F,H01L

Abstract:
A conditioning solution comprising:a fluorine source, said fluorine source being selected from the group consisting of hydrofluoric acid, ammonium fluoride, and other fluorine donating chemicals; a complementary acid, said complementary acid being selected from the group consisting of phosphoric acid, hydrochloric acid, and combinations thereof; a non-aqueous solvent, said non-aqueous solvent being selected from the group consisting of tetrahydrofuran, propylene carbonate, and blends thereof; and a surface passivation agent comprising ascorbic acid, wherein said conditioning solution is substantially free of water, and said fluorine source, said complementary acid, said non-aqueous solvent and said passivation agent are present in said conditioning solution in concentrations suitable for the selective removal of residues relative to any exposed metal on a semiconductor substrate.