Patent ID: 8110754

Claim:
A multi-layer wiring board without a core substrate, comprising: a multi-layer laminated structure which is formed by alternatively laminating a plurality of wiring layers and a plurality of insulating layers; a plurality of first terminals which are provided on a front surface of the multi-layer laminated structure on which a semiconductor integrated circuit device is to be mounted; a plurality of second terminals which are provided on a rear surface of the multi-layer laminated structure opposite to the front surface and which are to be electrically connected to another board; a solder resist formed of a resin material substantially covering the rear surface and having a plurality of openings formed therein, each of the plurality of openings exposing a corresponding one of the plurality of second terminals; a plurality of terminal pins bonded to a corresponding one of the second terminals, wherein each of the terminal pins is formed in a nailhead shape that includes a shaft portion and a head portion, and a diameter of the head portion is larger than that of the shaft portion; and a reinforcing plate which has a plurality of pin insertion openings formed at positions corresponding to the plurality of terminal pins and which is fixed to the solder resist, wherein the diameter of the pin insertion openings is smaller than the diameter of the head portion and is larger than the diameter of the shaft portion; wherein the reinforcing plate is mainly formed of a synthetic resin and is bonded to the solder resist by an adhesive.