Patent ID: 8822269

Claim:
A method of manufacturing a semiconductor device comprising: (a) preparing a wiring substrate having a first surface and a second surface opposite the first surface, wherein a plurality of first electrodes are formed over the first surface, and a plurality of second electrodes are formed over the second surface; (b) mounting a semiconductor chip having a first main surface over which a plurality of bumps are formed and a second main surface opposite the first main surface over the first surface of the wiring substrate such that the first main surface of the semiconductor chip faces to the first surface of the wiring substrate and the plurality of bumps of the semiconductor chip are electrically connected to the plurality of first electrodes, respectively; (c) disposing a heat spreader over the second main surface of the semiconductor chip; and (d) after the step (c), disposing a plurality of solder balls over the plurality of second electrodes of the wiring substrate, respectively and electrically connecting to each other.