Nuclear fusion reactors, such as the experimental stellarator Wendelstein 7-X at the Max Planck Institute for Plasma Physics (IPP) – Greifswald represent a promising solution for decarbonizing the power sector in the second half of the century. In pursuit of this objective, the cooling system of the W7-X divertor, specifically developed to handle high heat fluxes, is presently undergoing design improvements. A new concept has been proposed for this cooling system, which involves a network of parallel arrays of sub-millimeter rectangular micro-channels (MCs) on each 0.1mx0.1m tile covering the divertor surface. The micro-channels are obtained using Additive Manufacturing techniques in a galvanized copper heat sink substrate, with tungsten as the plasma-facing material and water used for cooling.