Patent ID: 7525814

Claim:
A wiring board, comprising: a core board having major surfaces and comprising a core main body comprised of a sheet of polymer material and a ceramic sub-core formed of a sheet of ceramic, said core board including a sub-core housing portion comprising one of (i) a through-hole penetrating both major surfaces of the core board and (ii) a concave portion open at one of the major surfaces of the core board, said ceramic sub-core being received in said sub-core housing portion; and a laminated wiring portion disposed on one of the major surfaces of the core board and comprising a plurality of dielectric layers comprised of a polymer material and a plurality of conductor layers alternating with said dielectric layers such that the laminated wiring portion comprises alternating dielectric and conductor layers; the ceramic sub-core including a capacitor, and a conductor pad formed on one major surface thereof so that one surface of the conductor pad is disposed on said one major surface, said conductor pad being electrically connected to said capacitor, the wiring board further comprising a Cu-plated layer formed on the conductor pad so as to entirely cover the surfaces thereof apart from said one surface of said conductor pad, at least the entire upper surface of said Cu-plated layer comprising a processed face processed by surface chemical processing so as to enhance adhesion between the processed face of the Cu-plated layer and the polymer material of said dielectric layers, and a lowermost dielectric layer of the laminated wiring portion, and a via conductor formed in the lowermost dielectric layer, being in electrical contact with the processed face.