MAGNETIC CORE MEMBER AND RFID USE TAG USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a magnetic core member that can sufficiently fulfill its function even under an environmental atmosphere at a comparatively high temperature. SOLUTION: The magnetic core member 12a for an RFID tag 11 is formed by a composite material made of heat-resisting magnetic powder or heat- resisting magnetic flake and heat-resisting plastic. The heat-resisting plastic is polyimide, epoxy or polyphenylsulfide. The heat-resisting magnetic power or heat-resisting magnetic flake is iron group alloy, ferrite or amorphous powder or flake or may be pure iron powder or flake with protection coating film on the surface. The iron group alloy preferably includes 8 wt.% to 40 wt.% of chromium and also 0.1 wt.% to 10 wt.% of silicon. The RFID tag is provided with the magnetic core member 12a, a coil main body 12b mounted on the magnetic core member 12a, and an IC chip 13 connected electrically to the coil main body 12b and capable of storing particular information to an article 16.