Patent ID: 7462511

Claim:
A method of producing a semiconductor device including and packaging a semiconductor having an electronic circuit formed therein and used when mounted on a board, comprising the steps of: forming an insulation layer formed by stacking a plurality of resin layers on a surface of a substrate having a surface, excluding a scribe line and forming a wiring layer electrically connected to the electronic circuit and buried in the insulation layer; forming a conductive post electrically connected to the wiring layer on the insulation layer; forming an insulating buffer layer buffering a stress which is generated when the semiconductor device is mounted on the board on the insulation layer in a region not exceeding a formation region of the resin layer formed with the largest area in a plane parallel to the surface of the substrate among the plurality of the resin layers and including a region at an outer circumferential portion of the conductive post; and dicing the substrate on the scribe line.