Patent ID: 8202622

Claim:
A circuit member connecting structure comprising: a first circuit member in which first circuit electrodes are located on the main surface of a first circuit board; a second circuit member in which second circuit electrodes are located on the main surface of a second circuit board; and a circuit connecting member which is disposed between the main surface of said first circuit member and the main surface of said second circuit member for connecting said first and second circuit members to each other; insulating layers of silicon dioxide or silicon nitride which are located adjacent both said first circuit electrodes and said second circuit electrodes, with at least some of said insulating layers being formed so that these layers are thicker than said circuit electrodes on the basis of the main surface of the circuit board in at least one of said first and second circuit members, wherein said circuit connecting member contains an insulating substance and conductive particles that have a mean particle size of 1 μm or greater but less than 10 μm, and a hardness of 4.4413 to 6.865 GPa, the storage elastic modulus of said circuit connecting member at 40° C. is 0.5 to 3 GPa, and the mean coefficient of thermal expansion of this member from 25° C. to 100° C. is 30 to 200 ppm/° C., and said first circuit electrodes and said second circuit electrodes are electrically connected via said conductive particles.