3M™ Flux Field Directional Material (FFDM) EM15TF Series is multi-layer construction consisting of a primary inner
soft magnetic layer with protective Polyethylene Terephthalate (PET) cover film and an acrylic pressure sensitive
adhesive (PSA).
3M FFDM EM15TF Series is available in standard 125mm x 125mm sheet.
(Customized sizes and thicknesses are available.)

Applications

3M™ Flux Field Directional Materials (FFDM) EM15TF Series is typically used for the 13.56MHz RFID reader and tag to
be mounted directly upon highly conductive surface. This might be the reader antenna surrounded by metallic body
or tag mounted on conductive substrate such as gas bottles. However, it is not possible to communicate with each
other under this metallic atmosphere. The magnetic fluxes through the conductive surface induce eddy current within
the conductor, which opposes the field responsible for their creation. It reduces the magnetic field on the surface of
the conductor to such a degree that communication between reader and tag becomes no longer possible. By inserting
3M FFDM EM15TF Series between antenna and conductor surface, it is possible to largely prevent the occurrences
of the eddy currents. This makes it possible to mount the antenna on metal surface. Many factors determine true
communication range such as antenna size, sensitivity, field intensity, modulation algorithm and environment. As shown
in Fig. 2, just inserting 3M FFDM EM15TF Series can increase communication distance. To maximize the performance, it
is necessary to take into account the fact that the inductance of antenna may be increased by 3MFFDM EM15TF Series.