an integrated circuit common - mode electromagnetic interference filter incorporating electro - static discharge protection comprising two inductive coils is provided . a pair of primary and secondary spiral inductor coils is disposed corresponding to each other . a dielectric layer is used to separate the primary spiral inductor coil from the secondary spiral inductor coil electrically . resistivity of a high - resistance substrate is more than 100 ω - cm for supporting the primary spiral inductor coil , the secondary spiral inductor coil and the dielectric layer thereon . the proposed filter structure can be formed in integrated circuit back - end processes and thus be extraordinarily advantageous of effectively eliminating electromagnetic interferences and having electrostatic protection effect at the same time , while having small footprint .