Apparatus and method for treating a substrate electrochemically while reducing metal corrosion

摘要

A process tool for electrochemically treating a substrate is configured to reduce the oxygen concentration and/or the sulfur dioxide concentration in the vicinity of the substrate so that corrosion of copper may be reduced. In one embodiment, a substantially inert atmosphere is established within the process tool including a plating reactor by providing a continuous inert gas flow and/or by providing a cover that reduces a gas exchange with the ambient atmosphere. The substantially inert gas atmosphere may also be maintained during further process steps involved in electrochemically treating the substrate including required transportation steps between the individual process steps.