A contactless ID chip to which a signal is inputted from an antenna by a wireless means, where data can be written only once. In the contactless ID chip having a nonvolatile EEPROM, data indicating whether writing is performed to the EEPROM is written simultaneously with basic data writing, and once...http://www.google.com.tw/patents/US7663473?utm_source=gb-gplus-share專利 US7663473 - Semiconductor device, IC card, IC tag, RFID, transponder, bills, securities, passport, electronic apparatus, bag, and clothes
