A semiconductor package, which includes: a first substrate, on which a pre-designed pattern is formed; a first chip, mounted by a flip chip method on one side of the first substrate; a first molding, covering the first substrate and the first chip; a first via, which penetrates the first molding, and which is electrically connected with the pattern formed on the first substrate; an interposer, which is placed on the first molding, and on both sides of which a pre-designed pattern is formed respectively; a second via, penetrating the interposer and electrically connecting both sides of the interposer; a second substrate, placed on the interposer with at least one conductive ball positioned in-between, such that the second substrate is electrically connected with the pattern formed on the interposer; and a second chip mounted on the second substrate, can be used to improve heat release and increase the degree of integration.