A semiconductor package includes a package substrate, the package substrate including a conductive plate, an insulating plate on the conductive plate, the insulating plate including a mounting region and a peripheral region surrounding the mounting region, and at least one capillary channel in the peripheral region, a semiconductor chip on the mounting region of the insulating plate, and a molding member on the insulating plate to cover the semiconductor chip, a portion of the molding member being in the at least one capillary channel.