FERRITE MATERIAL, FERRITE FILM AND RFID TAG USING IT

摘要

PROBLEM TO BE SOLVED: To provide a magnetic material which contributes to the improvement of the characteristics of the sending and receiving performance of a RFID tag even in high carrier frequencies.

SOLUTION: The magnetic material has a metal composition expressed as; FeaNibZncCod(a+b+c+d=3.0; 2.1≤a≤2.7; 0≤b≤0.4; 0≤c≤0.4; and 0.1≤d≤0.5). Preferably, ferrite film 144 having a thickness of ≤30 μm and an aspect ratio of ≥30 is formed from the ferrite material by a ferrite plating process. The film is placed closely to antenna conductor 120 of RFID tag 100. Ferrite film 144 may directly contact with antenna conductor 120.

COPYRIGHT: (C)2008,JPO&INPIT