The present invention teaches a method of manufacturing an enclosed transceiver, such as a radio frequency identification (“RFID”) tag. Structurally, in one embodiment, the tag comprises an integrated circuit (IC) chip, and an RF antenna mounted on a thin film substrate powered by a thin film battery....http://www.google.es/patents/US7583192?utm_source=gb-gplus-sharePatente US7583192 - Radio frequency identification device and method