Patent ID: 6592676
Filing Date: 2003-07-15
Classification: C11D,H01L

Abstract:
A method for reducing the metal contamination on a surface of a semiconductor substrate comprising the step of submitting said substrate to a wet cleaning and/or rinsing process in a solution capable of oxidising said surface,said solution having a pH value larger than 5, and said solution containing a substance, at least about 6% of the substance dissociating and ionising in said solution thereby creating an amount of ions of at least one species in said solution, at least one of the ion species being such that the ions of the species binding to the oxidised surface in such a way that said amount of ions substantially reduces the amount of metal ions bound to an oxidised surface, wherein said solution comprises a mixture of ammonia, hydrogen peroxide and an alcohol, the alcohol selected from the group consisting of isopropanol, ethanol, and mixtures of ethanol and isopropanol.