Patent ID: 7157415
Filing Date: 2007-01-02
Classification: C11D,C23C,G03F,H01L,H05K,Y10S,Y10T

Abstract:
1. A composition for the removal of etch residues from integrated circuits using copper materials, which consists essentially of: a choline compound; water; an organic solvent selected from the group consisting of dimethyl sulfoxide, dimethyl acetamide, ethylene glycol, ethylene glycol alkyl ether, diethylene glycol alkyl ether, triethylene glycol alkyl ether, propylene glycol, propylene glycol alkyl ether, N-methyl pyrrolidone, ethylene diamine, ethylene triamine, monoethanolamine, and diglycolamine; and from about 0.5% by weight to about 5% by weight of a corrosion inhibitor selected from the group consisting of: compounds of the general class where X, Y, and Z, are chosen from C, N, O, S, and P; and where pendant R groups R 1 –R 5 are chosen from H, a substituted C 1 –C 6 straight, branched or cyclo alkyl, alkenyl or alkynyl group, straight or branched alkoxy group, a substituted acyl group, amidyl group, hydroxyl group, a halogen, carboxyl group, alkoxyalkyl group, alkylamino group, alkylsulfonyl group, and sulfonic acid group; salts of said compounds of the general class; hydroxybenzene compounds of the general class where n=1–4, and where R 6 is present from 2 to 5 times and is chosen from H, a substituted C 1 –C 6 straight, branched or cyclo alkyl, alkenyl or alkynyl group, straight or branched alkoxy group, a substituted acyl group, amidyl group, a halogen, carboxyl group, alkoxyalkyl group, alkylamino group, alkylsulfonyl group, sulfonic acid group; and salts of said hydroxybenezene compounds, wherein X is carbon and Y is nitrogen or X is nitrogen and Y is carbon, Z is nitrogen, and R 1 –R 5 are hydrogen.