Patent ID: 7368064
Filing Date: 2008-05-06
Classification: C11D,G03F,H01L

Abstract:
1. An aqueous cleaning solution consisting of: 1.0 to 5.0 mass % of a fluorine-containing compound; 0.2 to 5.0 mass % of a chelating agent; 0.1 to 3.0 mass % of an organic acid salt; and water, and wherein said cleaning solution is capable of cleaning a substrate on which a nickel silicide layer is formed, wherein said fluorine-containing compound is at least one compound selected from the group consisting of hydrofluoric acid, ammonium fluoride, and amine fluoride, wherein said chelating agent is selected from a group consisting of chelating agents having an acid dissociation constant pKa wherein said organic acid salt is selected from carboxylic ammonium salt having an acid dissociation constant pKa