Patent ID: 8035035
Filing Date: 2011-10-11
Classification: H01L,H05K,Y02P,Y10T

Abstract:
1. A multi-layer wiring board without a core substrate, comprising: a multi-layer laminated structure which is formed by alternately 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 and 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 which is formed to cover the rear surface and which comprises a plurality of solder resist openings formed at positions corresponding to positions of the second terminals; a reinforcing plate which is made of a non-metal material and which comprises a plurality of reinforcing plate openings formed at positions corresponding to the positions of the second terminals; and an adhesive layer which is interposed between the solder resist and the reinforcing plate to fix the reinforcing plate to the solder resist in a surface contact state and which comprises a plurality of adhesive layer openings formed at positions corresponding to the position of the second terminals, wherein a diameter of the solder resist openings and a diameter of the reinforcing plate openings are smaller than that of the adhesive layer openings.