Contactless passive card

摘要

Non-contact chip card comprises a microelectronic processing circuit linked to an inductive power supply coil that is also used for two-way data transmission. The coil is made using planar metallized windings directly engraved on the component surface. The coil comprises a number of turns (M1-M3) with a given space between adjacent levels; each turn being short-circuited to a turn of the adjacent level so that a parallel turn arrangement results. <??>The invention also relates to a corresponding manufacturing method.