Patent ID: 8659151

Claim:
A semiconductor device comprising: a package substrate having electrode pads formed on a first surface thereof for being respectively electrically connected to electrodes of a semiconductor chip, and having external connecting pads formed on a second surface thereof and being electrically connected to the electrode pads; said semiconductor chip placed on the first surface of the package substrate and having the electrodes thereof respectively electrically connected to the electrode pads of the package substrate; post-like surface side terminals each having a plurality of protrusions formed around a side face thereof, each end portion of each said post-like surface side terminal being of a diameter that gradually increases towards an end of the terminal corresponding to the end portion, one end of each said surface side terminal being electrically connected to the electrode pads of the package substrate, each said post-like surface side terminal being of a height that is between twice and three times of a thickness of said semiconductor chip; and a sealing resin layer sealing the semiconductor chip and surrounding the surface side terminals from the side faces thereof, such that the other end of each surface side terminal is exposed from a surface of the sealing resin layer.