Process for producing ultrathin homogenous metal layers

A method of forming an ultrathin homogenous metal layer that serves as base metallization for formation of contact locations and/or contact pads and/or wirings of an integrated electronic component. The method includes the steps of depositing a first metal layer on a substrate at least in regions, and producing a second metal layer on the first metal layer at least in regions, component(s) of the second metal layer have a more positive redox potential than component(s) of the first metal layer, wherein ultrathin homogenous deposition of the second metal layer is effected by wet-chemical, current-free, electrochemical redox processes by element exchange from one or more metal salts as oxidant with at least a top metal atomic layer of the first metal layer as reductant.