Patent ID: 8115109

Claim:
A circuit board in which a joint region in an end portion of a first board and a joint region in an end portion of a second board are mutually superimposed and connected with wires on respective surfaces of the boards facing each other, wherein end faces of the wires in the first board are located at positions in the joint region of the first board but said wires do not extend to the end of said first board, end faces of the wires in the second board are located at positions in the joint region of the second board but said wires do not extend to the end of said second board, a gap between the end faces of the wires of the first board and the end faces of the wires of the second board is filled with a conductor, so that the end faces of the wires of the first board and the end faces of the wires of the second board are directly connected by the conductor, and the first board and the second board are connected by a resin.