An IC card includes an IC module and a card base. The IC module is constituted by a circuit board having contact patterns formed thereon and an IC chip mounted on the circuit board. The card base houses the IC module so as to expose the contact patterns. The circuit board of the IC module is constituted...http://www.google.com.hk/patents/US4994659?utm_source=gb-gplus-share專利 US4994659 - IC card
