Patent ID: 8802610
Filing Date: 2014-08-12
Classification: C23F,C23G

Abstract:
1. 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—(CH HS—(CH HS—(CH HS—(CH HS—(CH HS—(CH HS—(CH wherein the solvent (B) contains water and a water-soluble organic solvent.