Cleaning liquid and anticorrosive agent comprising a mercapto compound and solvent

A method of cleaning a substrate having a metal layer comprising copper or copper-containing alloy, the method comprising cleaning the substrate including a metal layer comprising copper or a copper-containing alloy using a cleaning liquid, wherein the cleaning liquid comprises (A) a mercapto compound, and (B) a solvent, wherein the mercapto compound (A) is at least one selected from the group consisting of compounds represented by the following formula (1):

• wherein, R represents a group selected from the group consisting of a hydroxyl group, an ethyl group, an n-propyl group, an iso-propyl group, an n-butyl group, an iso-butyl group, a sec-butyl group, a tert-butyl group, an alkoxy group having 1 to 4 carbon atoms, an alkylthio group having 1 to 4 carbon atoms, a hydroxyalkyl group having 1 to 4 carbon atoms, a mercaptoalkyl group having 1 to 4 carbon atoms, a halogenated alkyl group having 1 to 4 carbon atoms and a halogen atom;
• m is an integer of 1 to 3;
• and n is an integer of 0 to 3, wherein provided that m is 2 or 3, R may be the same or different;
• and selected from the group consisting of
• HS—(CH2)4—OH;
• HS—(CH2)5—OH;
• HS—(CH2)6—OH;
• HS—(CH2)7—OH;
• HS—(CH2)8—OH;
• HS—(CH2)9—OH;
• and
• HS—(CH2)10—OH,
• wherein the solvent (B) contains water and a water-soluble organic solvent.