Patent ID: 6514921
Filing Date: 2003-02-04
Classification: C11D,H01L

Abstract:
A cleaning agent for cleaning a semiconductor substrate surface, which consists essentially of ultra-pure water, 0.05 to 50% by weight of an organic acid having 1 to 3 carboxyl groups and 0.01 to 10% by weight of a complexing agent having chelating ability selected from the group consisting of ethylenediamine tetraacetic acid, trans-1,2-diaminocyclohexane tetraacetic acid, a phosphonic acid derivative, a condensed phosphoric acid, a diketone, an amine selected from the group consisting of ethylenediamine and triethanolamine, an inorganic ion selected from the group consisting of a halide ion, a cyanide ion, a thiocyanate ion, a thiosulfate ion and an ammonium ion, and a surfactant, to remove metallic contaminants from a semiconductor substrate surface.