WIRING BOARD
A wiring board of the present invention includes a build-up layer having a plurality of insulating layers laminated one upon another, a groove formed on a major surface of each of the insulating layers, and a wiring conductor formed in the groove. A surface of the wiring conductor lies lower than the major surface of each of the insulating layers which is formed in the wiring conductor in the groove.
1 . A wiring board comprising:
a build-up layer comprising a plurality of insulating layers laminated one upon another;
a groove formed on a major surface of each of the insulating layers; and
a wiring conductor formed in the groove,
wherein a surface of the wiring conductor lies lower than the major surface of each of the insulating layers which is formed in the wiring conductor in the groove.
2 . The wiring board according to claim 1 , wherein the build-up layer comprises the two insulating layers, and the major surface of each of the insulating layers has the groove formed in the wiring conductor.
3 . The wiring board according to claim 1 , further comprising a core substrate,
wherein the build-up layer is disposed on at least one surface of the core substrate.
4 . The wiring board according to claim 1 , wherein at least one of the insulating layers has a two-layer structure.