Patent ID: 8314492

Claim:
A semiconductor package comprising: a wiring board including a wiring pattern and/or a through wiring; a first electrode for external connection disposed on a side of a first surface of the wiring board; a ball pad which is an electrode on a side of a second surface of the wiring board, the second surface being opposite to the first surface of the wiring board; a semiconductor chip mounted on the side of the second surface of the wiring board; a mold resin covering at least the semiconductor chip; an electrode unit being connected with the ball pad and penetrating the mold resin; and a second electrode for external connection being connected with a portion of the electrode unit on a side of an outer surface of the mold resin; the electrode unit including: a first ball disposed on the ball pad; a second ball disposed between the first ball and the second electrode for external connection; and a solder material connecting between the ball pad and the first ball, between the first ball and the second ball, and between the second ball and the second electrode for external connection; each of the first ball and the second ball including a core part having a glass transition temperature which is higher than a melting point of the solder material.