Patent ID: 7528487

Claim:
A semiconductor device comprising: a semiconductor chip including: a substrate, an outer-connection electrode, an insulating layer which is provided on the substrate and has an opening formed on the outer-connection electrode so as to expose a part of the outer-connection electrode, and a bump having a first conductive layer on the outer-connection electrode and a second conductive layer covering the first conductive layer, the first conductive layer being made of nickel and the second conductive layer being made of copper; and; a wiring board having a land and an insulating material containing dispersed conductive particles, provided on the wiring board, wherein: an electrical connection is established by the conductive particles penetrating into both the second conductive layer and the land; and the thickness of the second conductive layer is selected so that a depth of penetration of the conductive particles into the second conductive layer is a quarter or more of a particle size of the conductive particles.