Patent ID: 8058220

Claim:
A cleaning liquid for photolithography to be used for cleaning a photoexposure device in a process of liquid immersion lithography that comprises filling the space between the optical lens member of a photoexposure device and an object for photoexposure mounted on the wafer stage, with a medium for liquid immersion lithography; the cleaning liquid comprising (a) a surfactant, (b) a hydrocarbon solvent, and (c) water, wherein component (a) contains at least two surfactants of at least one selected from surfactants having a mean HLB value of at most 9 and at least one selected from surfactants having a mean HLB value of more than 9, and wherein component (b) is at least one selected from linear or branched alkanes having from 8 to 12 carbon atoms, and linear or branched alkenes having from 8 to 12 carbon atoms.