An IC card including an electric circuit board and have face and back metallic panels that include a housing and are attached to a resin frame. The IC card has a discharge pattern formed on the electric circuit board for discharging static electricity applied to the metallic panels, a conductor...http://www.google.com/patents/US5671123?utm_source=gb-gplus-sharePatent US5671123 - IC card with a discharge pattern and a ground pattern separated from each other 
