EM15TF-014-1 3M

Technical Data Nov 2014 3M Flux Field Directional Material EM15TF Product Description 3M Flux Field Directional Material EM15TF Series is multi-layer construction consisting of a primary inner soft magnetic layer with protective PET cover film and an acrylic pressure sensitive adhesive. High permeability and low loss magnetic material Thin overall construction Black PET protection tape cover film Pressure sensitive acrylic adhesive Supplied on a removable liner for ease of handling 3M FFDM EM15TF Series is available in standard 125mm x 125mm sheet (* Customized size and thickness are available) Product Construction/Material Description Cover Film SCT Magnetic Layer PSA Adhesive Layer Release Liner Thickness(mm) Product Cover Magnetic PSA Total EM15TF-007 0.050 0.070 0.010 0.010 EM15TF-008 0.060 0.080 (Customized (Customized EM15TF-010 0.080 0.100 thickness are thickness are EM15TF-012 0.100 0.120 available) available) EM15TF-014 0.120 0.140 * Typical tolerance of each thickness: +/- 10 % Applications 3M Flux Field Directional Materials 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 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 3M Flux Field Directional Material EM15TF 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 simple 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 3M FFDM EM15TF Series. Figure1: Real and Imaginary part of Permeability with Frequency. Figure 2: Data Communication Length between Reader and ISO 14443A Type. 2