A microelectronic structure (200) and a fabrication method of microelectronic are described. A first package (10) has a first conductive pad (40, 41, 47, 48) formed on a first foundation layer (12). A loop of conductive wire (50-53) is wirebonded to the first conductive pad ((40, 41, 47, 48) of the first foundation layer (12). A mold cap (70) is formed on the first foundation layer (12). A via (90-93) is formed in the mold cap (70) to reach the conductive wire (50-53). A solder structure (80-83) is coupled to the conductive wire (50-53). A second package (100) is connected to the first package (10) by attaching a second solder structure (110-113) of a second package (100) to the first solder structure (80-83) of the first package (10).