Forming a high frequency contact-less smart card with an antenna coil

摘要

An antenna coil formed by wire 14 is first embedded by means of ultrasonic transducer (22, Fig 1) on upper surface 16 of core sheet 12 and then the card is embedded with an integrated circuit (IC). A cavity 32 for receiving part of the IC is provided on the core sheet and adhesive tape 30 retains the IC in place temporarily after it is placed in the cavity by way of the lower surface (36, Fig 3) of the core sheet. The IC is electrically connected to the antenna coil by thermo compression bonding while the core sheet rests on platform 40. The card can then be laminated with base sheets (44, 46, Fig 6).