| 摘要 |
PROBLEM TO BE SOLVED: To enable electromagnetic reading with a high reading sensitivity by constituting an antenna so that the helical conductive patterns of respective unit sections are connected to each other in series through a prescribed connecting part so as to permit a current to flow in the same winding direction at the time of being folded. SOLUTION: The four helical conductive patterns C11, C12, C21 and C22 formed in the front and the back of a resin-made film 1 are connected to each other in series so as to permit the current to flow in the same winding direction at the time of being folded by a chevron shape folding line L1 or a valley shape folding line L2 so that the antenna coil being a four-layer printed coil is constituted. That is, the inner peripheral end part TP of the helical and conductive pattern C22 corresponding to the winding start end of the antenna coil is electrically connected to a front and back conductive part TH2 corresponding to a winding end through a current route. Thus, electromagnetic wave reading with the high reading sensitivity being suitable for a slip intermediate packing type IC label, etc., is attained. |
