Patent ID: 7662762
Filing Date: 2010-02-16
Classification: C09K,C11D,G03F,H01L

Abstract:
1. A method for fabricating a semiconductor wafer including the steps comprising: cleaning the wafer by contacting same with a cleaning formulation, wherein said cleaning formulation comprises at least one fluoride source, water and a nitrogen-containing carboxylic acid or 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 , HOOCCH 2 N(CH 3 )CH 2 COOH, and COOH—CH 2 —NRR′, wherein each of R and R′ is independently selected from the group consisting of hydrogen, alkyl, aryl, and carboxylic acid, and wherein at least one fluoride source is selected from the group consisting of: triethanolammonium fluoride (TEAF), diglycolammonium fluoride (DGAF), and triethylamine tris (hydrogen fluoride) (TREAT-HF).