Patent ID: 7109579

Claim:
A semiconductor device comprising: a silicon substrate constituting a base; a semiconductor chip provided on said base and having a first main surface on which a plurality of electrode pads is provided, a surface protection film formed on said first main surface such that said electrode pads are exposed, a second main surface which opposes said first main surface, and a plurality of side surfaces between the surface of said surface protection film and said second main surface; an insulating extension portion formed on said base so as to surround said side surfaces of said semiconductor chip; a plurality of wiring patterns electrically connected to said electrode pads and extended from said electrode pads to the surface of said extension portion; a plurality of electrode posts formed on portions of said wiring patterns, the portions of said wiring patterns being arranged on the insulating extension portion; a sealing resin formed on said wiring patterns, said insulating extension potion, and the side surfaces of the electrode posts; and a plurality of external terminals provided on said electrode posts.