Flexible printed circuit board and smart card module and smart card using same

The invention relates to a flexible printed circuit board and a smart card module and a smart card using the same. The flexible printed circuit board comprises at least one layer of substrate. At least one side of the substrate is provided with a pad area for installing a chip component. The pad area is provided with a plurality of equally-spaced pads and traces connected to the corresponding pads. At least one of the traces includes an extension part which extends along the boundary of the pad area. In the embodiment of the invention, in the mounting process of a chip in the pad area of the flexible printed circuit board, more adhesive can be applied to a larger PET film, and the therefore, the bonding stability between the chip and the pad area is improved.