Patent ID: 7250391
Filing Date: 2007-07-31
Classification: G03F,H01L

Abstract:
1. A cleaning composition for removing KrF excimer resist or ArF excimer resist from a substrate including a copper film, comprising a salt of hydrofluoric acid and a base not containing a metal (A component), a water-soluble organic solvent that is a mixture of amides and polyhydric alcohol or its derivatives (B1 component), at least one acid selected from the group consisting of formic acid, acetic acid, propionic acid, butyric acid, oxalic acid, glycolic acid, tartaric acid, citric acid, benzoic acid, toluic acid, phthalic acid, sulfuric acid, hydrochloric acid, nitric acid and phosphoric acid (C component), water (D component), and an ammonium salt which is selected from the group consisting of aliphatic monocarboxylic acid ammonium salt, aliphatic polycarboxylic acid ammonium salt, oxycarboxylic acid ammonium salt and amino phosphonic acid ammonium salt (E1 component), the content of said salt of hydrofluoric acid and a base not containing a metal (the A component) being 0.01-1 mass % and said cleaning composition having a pH of 4-8.