A method of manufacturing a semiconductor package which includes mounting a first chip on a first substrate by a flip chip method, the first substrate having a pre-designed pattern formed thereon; forming at least one bump by performing soldering, on at least one predetermined position electrically connected with the pattern formed on the first substrate; forming a first molding by performing molding, such that the first molding covers the first substrate and the first chip; placing an interposer on the first molding; and placing a second substrate on the interposer, the second substrate having a second chip mounted thereon.