STACKED SEMICONDUCTOR PACKAGE

A semiconductor package comprising: a base substrate; a first semiconductor chip unit attached to the base substrate and including at least one first semiconductor chip; a second semiconductor chip unit stacked on the first semiconductor chip unit and including at least one second semiconductor chip; at least one third semiconductor chip disposed between the first semiconductor chip unit and the second semiconductor chip unit and having an area smaller than that of the at least one first semiconductor chip and that of the at least one second semiconductor chip; and an insulating material layer disposed between the first semiconductor chip unit and the second semiconductor chip unit to surround at least a portion of the at least one third semiconductor chip and having a thickness larger than that of the third semiconductor chip.