Patent ID: 8685910

Claim:
A cleaning liquid for stripping and dissolving a photo-resist pattern having a film thickness of 10-150 Î¼m, which consists essentially of (a) 0.5-15 mass % of a quaternary ammonium hydroxide represented by the following general formula (I): wherein all groups or at least three groups of R 1 , R 2 , R 3 , and R 4 each independently represents an alkyl group or a hydroxyalkyl group each having 3-6 carbon atoms, and one group of R 1 , R 2 , R 3 , and R 4 may represent an alkyl group or a hydroxyalkyl group each having 1-6 carbon atoms, (b) 65-97 mass % of a water-soluble organic solvent, and (c) 0.5-30 mass % of water, wherein component (b) is a mixed solvent of dimethyl sulfoxide and sulforane and/or N-methyl-2-pyrrolidone.