A method for the surface treatment of a substrate surface of a substrate includes arranging the substrate surface in a process chamber, bombarding the substrate surface with an ion beam, generated by an ion beam source and aimed at the substrate surface, to remove impurities from the substrate surface, whereby the ion beam has a first component, and introducing a second component into the process chamber to bind the removed impurities. A device for the surface treatment of a substrate surface of a substrate includes a process chamber for receiving the substrate, an ion beam source for generating an ion beam that has a first component and is aimed at the substrate surface to remove impurities from the substrate surface, and means to introduce a second component into the process chamber to bind the removed impurities.