Patent ID: 7816783

Claim:
A resin wiring substrate at least comprising: a resin base material, a plurality of connecting terminals formed in a semiconductor element mounting region on a surface of the resin base material, a plurality of external connecting terminals formed on the other surface of the resin base material, a first resin coating film formed in an external region excluding the semiconductor element mounting region on the surface of the resin base material, and a second resin coating film formed on the other surface in a shape exposing at least a part of each of the external connecting terminals; wherein the second resin coating film comprises a plurality of separate portions on the other surface of the resin base material and at least two of the external connecting terminals are exposed from each of the separate portions of the second resin coating film, an opening is formed in a center portion of each of the separate portions of the second resin coating film and the other surface of the resin base material is exposed through each of the openings and between adjacent separate portions of the second resin coating film.