Patent ID: 8130507

Claim:
A component built-in wiring board, comprising: a core substrate having a core front surface and a core back surface opposite to the core front surface, the core substrate comprising a housing hole opened on at least the core front surface side; a first component having a component front surface and a component back surface opposite to the component front surface, wherein the first component is housed in the housing hole such that the core front surface and the component front surface are directed to the same direction; a first built-up layer formed on the core front surface of the core substrate, the first built-up layer comprising a plurality of insulating layers and a plurality of wiring layers, wherein a surface of the first built-up layer has a component mounting region on which a second component electrically connected to the first component is mounted; a second built-up layer formed on the core back surface of the core substrate, the second built-up layer comprising a plurality of insulating layers and a plurality of wiring layers; and a capacitor comprising: an electrode layer; and a dielectric layer formed on a major surface of the electrode layer, wherein the capacitor is embedded in at least one of the first built-up layer and the second built-up layer such that the major surface is in parallel with a surface of the at least one of the first built-up layer and the second built-up layer; wherein an external dimension of the capacitor is larger than that of the first component and that of the component mounting region, wherein the first component and the component mounting region are included in an embedded region in which the capacitor is embedded, when viewed from a thickness direction of the component built-in wiring board; wherein a signal terminal pad is formed in the component mounting region, wherein the capacitor has a through hole therethrough, wherein a signal wiring is provided in the first built-up layer such that the signal wiring is provided in the through hole without contacting the capacitor, and wherein the first component is electrically connected to the signal terminal pad via the signal wiring.