Portable card-shaped data carrier e.g. contactless smartcard used for non-cash payment, has one or more piezoelectric films formed partially, and control unit connected to piezoelectric film, to detect deformation of piezoelectric film

摘要

The card-shaped data carrier (1) comprises one or more piezoelectric films (3) made of polyvinylidene fluoride (PVDF) which are formed partially, and a control unit (2) connected to the piezoelectric film, to detect the deformation of piezoelectric film. A cover layer is partially formed at opposite sides of the piezoelectric film. One of the piezoelectric films is formed as a multilayered structure. An independent claim is included for manufacturing method of portable card-shaped data carrier.