Patent ID: 7779538

Claim:
A method for mutually connecting circuit boards, comprising the steps of: preparing a first circuit board having connection parts assigned to end parts of a plurality of conductor wirings, and a second circuit board having connection parts assigned to corresponding end parts of a plurality of conductor wirings, to which said first circuit board is connected; disposing the connection parts of said first circuit board to face the connection parts of said second circuit board with a thermosetting adhesive film being present between the connection parts of said first circuit board and the connection parts of said second circuit board; and applying heat and pressure to said connection parts and to said thermosetting adhesive film sufficiently high to thoroughly push away the adhesive film so as to establish electrical contact between connection parts of said circuit boards facing each other and to allow for curing of the adhesive; wherein the conductor wirings constituting said connection parts of at least one of said first and second circuit boards contain non-linear wirings.