Printed circuit with ID tag and method for recognizing of distribution root

摘要

There is provided a printed circuit with an ID tag capable of maintaining secrecy of an ID code attached to the printed circuit and capable of recognizing a route of delivery from data of the ID code of the printed circuit and generally controlling history (including information of kind and fabrication source of semiconductor chip) of the printed circuit and a mounted electronic part including the route of the distribution after fabrication. The printed circuit is constructed by a constitution in which a noncontact ID tag having a fixed ID portion exclusive for reading storing the ID code specifying at least the printed circuit and a variable ID portion comprising a plurality of memory cells capable of changing the ID code by instruction from outside, is embedded in an inner layer portion of the printed circuit.