Method of manufacturing a semiconductor package with a lead frame having a support structure

1. Field of the Invention The present invention relates to a method of manufacturing semiconductor packages and products thereof. The method of manufacturing comprises steps of: (a) providing a lead frame which comprises a die pad, a plurality of connecting parts and a plurality of leads, wherein the die pad is lower than the leads and connects the leads through the connecting parts, and wherein the die pad comprises at least one supporting structure to fix the lead frame substantially; (b) mounting a die onto the die pad and electrically connecting the lead frame and die by bonding wires; (c) providing an upper mold and a lower mold, wherein the upper mold and lower mold are located at an upper side and a lower side of the leads, respectively, wherein the supporting structures of the die pad are allowed to be supported on the lower mold, and the leads are allowed to protrude outwards from a mold cavity formed by the upper and lower molds; (d) setting the lead frame in steps (a) and (b) onto the lower mold in step (c) and making the supporting structures of the die pad to be supported on the lower mold and then combining the upper mold to the lower mold; (e) applying an encapsulant into the mold cavity formed by the upper and lower molds; and (f) removing the upper and lower molds after encapsulating.