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A Novel Environmentally-friendly Corrosion-free Post-stripping Rinsing Procedure After Solvent Strip

Corrosion of metal lines during the post-stripping rinse is a severe problem in multi-level metallization processes. In this paper it is demonstrated that the addition of small amounts of the inorganic acid HNO3 to the ultrapure water used for rinsing can effectively be used to suppress this corrosion without the need of an additional IPA- step.