Patent ID: 8755196

Claim:
A wiring board, comprising: a first insulation layer; a conductive pattern formed on the first insulation layer; a second insulation layer formed on the conductive pattern and the first insulation layer and having an opening portion exposing at least a portion of the conductive pattern; and a connection conductor formed in the opening portion of the second insulation layer such that the connection conductor is positioned on the portion of the conductive pattern, wherein the connection conductor has a tip portion which protrudes from a surface of the second insulation layer and which has a tapered side surface tapering toward an end of the tip portion, the second insulation layer has a lower-layer insulative section and an upper-layer insulative section, and the upper-layer insulative section of the second insulation layer is formed on the lower-layer insulative section of the second insulation layer and has an elastic coefficient which is lower than an elastic coefficient of the lower-layer insulative section.