Patent ID: 6876091
Filing Date: 2005-04-05
Classification: H01L,H05K,Y10T

Abstract:
1. A wiring board comprising: a core substrate defining an opening; an electronic component; an embedding resin having a dielectric constant of less than or equal to about 5 and tan δ of less than or equal to about 0.08; and a substrate in which a build-up layer formed by laminating an insulating and a wiring layer in alternate fashion is formed, wherein, said electronic component is embedded in the opening by said embedding resin, wherein the substrate in which the build-up layer is formed is disposed across the opening and in contiguous contact with the core substrate and the embedding resin, wherein the electronic component includes an electrode, and wherein a distance from the electrode to the wiring layer of the substrate in which the build-up layer formed is less than or equal to 100 μm.