Patent ID: 8410375

Claim:
A wiring board comprising: a wiring member formed of alternatingly stacked wiring layers and insulating layers, the wiring layers including a first connection pad formed on a first surface of the wiring member and a second connection pad formed on a second surface of the wiring member, the second surface of the wiring member being a surface opposite to the first surface of the wiring member; a solder resist layer formed on the second surface of the wiring member and having a first opening portion so that the second connection pad is not covered by the solder resist layer, the solder resist layer being formed on an outermost surface layer of the wiring member; an external connecting terminal formed on the second connection pad; a first reinforcing member formed on the solder resist layer, the first reinforcing member including a filler material and covering the first opening portion of the solder resist layer, the first reinforcing member forming a first outermost layer of the wiring board; and a second reinforcing member formed on the first surface of the wiring member and having a second opening portion extending through the second reinforcing member at a central part of the second reinforcing member, the second reinforcing member forming a second outermost layer of the wiring board, the second opening portion exposing the first connection pad, wherein the first and the second reinforcing members are configured to reinforce the wiring board.