A semiconductor package includes a memory chip having chip pads on a first surface thereof. A redistribution layer is formed on the first surface of the memory chip. The redistribution layer is electrically connected to the chip pads. The redistribution layer has first redistribution pads on a first surface of the redistribution layer in a first region and a plurality of second redistribution pads on the first surface of the redistribution layer in a second region thereof. A processor chip is disposed on the first region of the redistribution layer and is electrically connected to the first redistribution pads. A sealing member is disposed on the first surface of the redistribution layer and covers the processor chip. Conductive structures are on the second region and penetrate through the sealing member and extend upwardly in a vertical direction away from the second redistribution pads.