Patent ID: 7638876

Claim:
A connected structure comprising: a bumpless semiconductor device, the bumpless semiconductor device comprising electrode pads provided on the surface thereof, a passivation film formed at the periphery of the electrode pads, and conductive particles metallically bonded to the electrode pads; and a circuit board having connection terminal to be connected with the bumpless semiconductor device; wherein: the conductive particles are composite particles, each composite particle comprising a resin particle and a metallic plating layer formed on the surface of the resin particle; the metallic plating layer comprises a Ni plated layer and a Au plated layer, the Au plated layer being formed as the outermost layer of the conductive particle and having a thickness of 10 to 1000 nm; the bumpless semiconductor device and the circuit board are joined by an insulating adhesive material so that conductive particles metallically bonded with the connecting pads of this bumpless semiconductor device can contact the connection terminals of the circuit board; and when the connected structure is subjected to a thermal shock test with 1000 cycles and between −55° C. to 125° C., a rise in resistance in the connected structure is no more than 10 mΩ.