Patent ID: 7557440

Claim:
A wiring board comprising: a substrate core having a core main surface, a core rear surface and a housing opening portion which opens at least at said core main surface; a ceramic chip including a ceramic sintered body having a chip first main surface and a chip second main surface, an inner conductor located inside of said ceramic sintered body, a plurality of first terminal electrodes comprised of a metallized layer, electrically connected to said inner conductor, formed on said chip first main surface so as to protrude therefrom, and a plurality of second terminal electrodes comprised of a metallized layer, electrically connected to said inner conductor, and formed on said chip second main surface so as to protrude therefrom, the ceramic chip being accommodated in said housing opening portion such that said core main surface and said chip first main surface face in a common direction; a filler disposed in a gap between an inner surface of said housing opening portion and a side face of said ceramic chip so as to fix said ceramic chip in place; a built-up layer comprising at least one interlayer insulating layer and at least one conductor layer alternately laminated on both said core main surface and said chip first main surface; and a projecting portion, unconnected to an electrode, disposed on a second main surface side of the chip outwardly of said plurality of second terminal electrodes so as to surround said plurality of second terminal electrodes, and formed on said chip second main surface so as to protrude therefrom, for preventing spreading of said filler.