Patent ID: 7605113

Claim:
A method of making an integrated circuit containing a copper containing substrate, comprising cleaning said substrate with a wafer cleaning formulation having a pH greater than 7, wherein said cleaning reduces the amount of contamination on the integrated circuit concomitantly improving device performance, and wherein said wafer cleaning formulation comprises a fluoride source and a nitrogen-containing carboxylic acid or an imine selected from the group consisting of: iminodiacetic acid (IDA), glycine, 1,1,3,-tetramethylguanidine (TMG), CH 3 C(═NCH 2 CH 2 OH)CH 2 C(O)N(CH 3 ) 2 , CH 3 C(═NCH 2 CH 2 OCH 2 CH 2 OH)CH 2 C(O)N(CH 3 ) 2 , CH 3 C(═NH)CH 2 C(O)CH 3 , (CH 3 CH 2 ) 2 NC(═NH)N(CH 3 CH 2 ) 2 , HOOCCH 2 N(CH 3 ) 2 , and HOOCCH 2 N(CH 3 )CH 2 COOH.