Patent ID: 8043709

Claim:
A method for manufacturing a circuit member connecting structure which comprises 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, wherein insulating layers of silicon dioxide or silicon nitride are located adjacent to both of said first circuit electrodes and said second circuit electrodes, 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 both of said first and second circuit members, said method comprising the steps of: interposing a film-form circuit connecting material between the main surface of said first circuit board and the main surface of said second circuit board, and curing said circuit connecting material by the application of heat and pressure via said first and second circuit members for thereby connecting said first circuit member and said second circuit member, so that said first circuit electrodes and said second circuit electrodes are electrically connected via said conductive particles, wherein the film-form circuit connecting material is formed by forming a circuit connecting material into a shape of a film; wherein the circuit connecting material has a property that the material can electrically connect a first circuit member in which first circuit electrodes are located on the main surface of a first circuit board, and a second circuit member in which second circuit electrodes are located on the main surface of a second circuit board, when insulating layers of silicon dioxide or silicon nitride are located adjacent to at least one of said first circuit electrodes and said second circuit electrodes, with at least some of said insulating layers being formed such that these layers are thicker than said circuit electrodes on the basis of said main surface in at least one of said first and second circuit members; wherein said material contains a bonding agent composition and conductive particles which 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; and wherein said material exhibits, when subjected to a curing treatment, a storage elastic modulus of 0.5 to 3 GPa at 40° C., and a mean coefficient of thermal expansion of 30 to 200 ppm/° C. at from 25° C. to 100° C.