Patent ID: 8359738

Claim:
A method of manufacturing a wiring board comprising: forming a first wiring board by forming a base substrate, forming a first insulation layer on a first surface of the base substrate and a second insulation layer on a second surface of the base substrate opposing the first surface, at least one of the first insulation layer and a second insulation layer being a non-pliable insulation layer, forming at least one via in at least one of the first and second insulation layers, and cutting the first insulation layer in a first area and cutting the second insulation layer in a second area offset from said first area to form a first substrate laminated to a second substrate with the base layer interposed therebetween, the second substrate having a smaller mounting area than a mounting area of the first substrate such that the first substrate extends beyond an edge of the second substrate; connecting a pliable member to the base substrate of the first wiring board; connecting the pliable member to a second wiring board to thereby connect the first wiring board to the second wiring board; forming an interlayer groove portion between the first substrate and the second substrate; and filling the interlayer groove portion with at least one of a gas, liquid or solid material.