Patent ID: 8697345
Filing Date: 2014-04-15
Classification: C11D,G03F,H01L

Abstract:
1. A photoresist stripping solution comprising (a) a quaternary ammonium hydroxide of the following formula (I): where R 1 , R 2 , R 3 and R 4 are each independently an alkyl group or a hydroxyalkyl group, provided that at least one of R 1 , R 2 , R 3 and R 4 is an alkyl or hydroxyalkyl group having at least 3 carbon atoms, (b) a water-soluble amine, (c) water, (d) a corrosion inhibitor and (e) a water-soluble organic solvent, wherein component (a) is at least one compound selected from the group consisting of tetrabutylammonium hydroxide, methyltributylammonium hydroxide and methyltripropylammonium hydroxide, wherein component (b) is at least one compound selected from the group consisting of monoethanolamine, 2-(2-aminoethoxy)ethanol and N-methylethanolamine, wherein the compounding ratio of component (a) to component (b) is in the range of from 1:3 to 1:10 by mass, and wherein the photoresist stripping solution is to be applied to a substrate having Al wiring or Cu wiring, or an Si-based interlevel film thereon.