Patent ID: 8053275

Claim:
A method of producing a semiconductor device, comprising the steps of: preparing a substrate frame to be divided into a package substrate; forming an electrode pad on a front surface of the package substrate; forming an outer connection pad on a backside surface of the package substrate so that the outer connection pad is electrically connected to the electrode pad; mounting a semiconductor chip on the front surface so that an electrode of the semiconductor chip is electrically connected to the electrode pad; molding a sealing resin layer using a die metal having a plurality of protrusions with a. column shape and contacting with the electrode pad so that the die metal is pressed against a surface of the substrate frame so that the sealing resin layer includes a plurality of through holes each exposing the electrode pad and seals the semiconductor chip, said through holes being arranged in a pattern along an outer contour of the semiconductor chip; filling each of the through holes with a conductive material to form a through electrode having one end portion electrically connected to the electrode pad and the other end portion exposed from the sealing resin layer, said through electrodes being situated surrounding the semiconductor chip; and scribing the substrate frame to divide the substrate frame into the package substrate.