In the era of growing technology, present work shows novelty of a joining process of higher thermal conductive material like copper with reasonable properties. Recent scientific studies explored microwave processing is a green manufacturing process which is significantly fast and hence highly economical.  Joining of bulk copper has been carried out through microwave hybrid heating (MHH) by the exposure of microwave radiation of 2.45 GHz for 300 s. A sandwich layer of copper powder particles (~5 µm) was used between the plates. Bulk copper joints were characterized using X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), microhardness, and Universal testing machine (UTM). FE-SEM results show uniform heating which is the significance of microwave heating (MW). Cellular growth in MW induced joints has been observed. MW processing of joints has been carried out in atmospheric condition owing to which copper particles at elevated temperature reacts with atmospheric oxygen and forms oxides of copper, as observed in XRD study.  Observed average Vickers’ microhardness of the joints was found to be 78±7 Hv. Copper joints were further characterized through tensile testing in an UTM, which shows, failure of the joint is at the load of ~2750 N with a deformation of ~2.3 mm.