Patent ID: 8303717

Claim:
A method for producing a substrate comprising the step of cleaning a substrate to be cleaned that has a metal surface or a glass surface and that has undergone polishing of the surface using a polishing slurry by cleaning a hard surface with a hard-surface cleaning agent consisting of an alkali-type nonionic surfactant composition comprising: a nonionic surfactant (component A), water (component B), at least one compound (component C) selected from the group consisting of benzenesulfonic acid, toluenesulfonic acid, dimethylbenzenesulfonic acid, hydroxybenzenesulfonic acid and salts thereof, at least one alkaline chemical (component D) selected from the group consisting of potassium hydroxide and sodium hydroxide, the alkali-type nonionic surfactant composition containing the nonionic surfactant (component A) in an amount of 0.5 to 20 wt % and having a pH at 25° C. of 13.5 to 14, wherein the hard-surface cleaning agent is supplied to the hard surface by immersing the hard surface in the hard-surface cleaning agent and/or injecting the hard-surface cleaning agent.