Patent ID: 9433096
Filing Date: 2016-08-30
CPC Classification: H01L,H05K,Y10T

Claim Text:
1. A wiring board comprising: a resin substrate in which a plurality of reinforcement members are arranged horizontally, wherein the resin substrate is free from a wiring layer; a through electrode filled in a through hole penetrating the substrate in the thickness direction; and wiring layers respectively formed on both surfaces of the substrate and electrically connected to each other via the through electrode, wherein the plurality of the reinforcement members are non-uniformly distributed in the thickness direction, with one or more of reinforcement members being densely distributed in a middle region of the substrate in the thickness direction and a remainder of the reinforcement members being sparsely distributed in near-surface regions of the substrate that are the regions other than the middle region of the substrate, wherein the reinforcement members in the middle region of the substrate in the thickness direction have a higher density than the reinforcement members in the near-surface regions of the substrate.