Patent ID: 8293694

Claim:
A method of making an integrated circuit containing a copper containing substrate, comprising contacting said substrate with a wafer cleaning formulation, wherein said wafer cleaning formulation comprises at least one amine and a nitrogen-containing carboxylic acid or an imine selected from the group consisting of: iminodiacetic acid (IDA), glycine, 1,1,3,3-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.