Patent ID: 7541322
Filing Date: 2009-06-02
Classification: C11D,H01L

Abstract:
1. A cleaning solution for a substrate for a semiconductor device, which comprises the following components (a), (b), (c) and (d), wherein the weight ratio of the component (a) to the component (b) (component (a)/component (b)) is at least 0.8 and at most 5, and said solution has a pH of at least 1.5 and less than 6.5: component (a): an organic acid; component (b): an organic alkaline component represented by the following formula (I), wherein R component (c): at least one anionic surfactant selected from the group consisting of an alkylsulfonic acid or a salt thereof, an alkylbenzenesulfonic acid or a salt thereof, an alkyldiphenyl ether disulfonic acid or a salt thereof, an alkylmethyltaurate or a salt thereof, an alkyl sulfate or a salt thereof, an alkyl ether sulfate or a salt thereof, and a sulfosuccinic acid diester or a salt thereof; and component (d): water.