Patent ID: 8123976

Claim:
An alkaline aqueous solution composition used for washing or etching a substrate, the composition comprising a chelating agent represented by the general formula (I): wherein R is an alkylene with a carbon number of 2-6,1,2-cyclohexylene, or 1,2-phenylene group, wherein any one or more hydrogen atoms may be replaced by the same or different substituents, rings A and B are benzene rings wherein any one or more hydrogen atoms may be replaced by the same or different substituents, and wherein the substituents are selected from the group consisting of an alkyl group with a carbon number of 1-10, an alkenyl group with a carbon number of 1-10, an alkynyl group with a carbon number of 1-10, an acyl group with a carbon number of 1-10, an alkoxy group with a carbon number of 1-10, a phenyl group, a benzyl group, a naphthyl group, a carboxyl group, a sulfonate group, a cyano group, a hydroxyl group, a thiol group, an amino group, a halogen and a nitro group, and an alkaline component.