The　objective　of　this　study　was　to　deposit　thin　films　on　PET　polymer　substrate　and　examine　the　functional　properties　systematically.　Their　properties　have　been　studied　as　a　function　of　the　N-2-Ar　flow　rates,　deposition　time　span　and　Cu　doping.　Iron　nitride　film　deposited　on　both　sides　exhibits　ferromagnetic　phases,　-Fe4N　and　epsilon-Fe3N　co-existed,　shows　negligible　magnetic　anisotropy.　Other　samples　show　the　evolution　of　N-rich　(FeN,　Fe2N)　and　N-poor　(Fe16N2,　Fe3N,　Fe4N)　phases　under　different　deposition　time　conditions.　XPS　analysis　and　free　energy　calculations　confirmed　that　co-sputtered　Fe-Cu　thin　films　are　more　stable　than　layer　deposited　counterparts.　From　VSM　results　it　is　evident　that　the　dominant　phase,　changes　steadily　from　the　ferromagnetic　-Fe　(N)　to　the　paramagnetic　-Fe2N　with　the　increase　of　nitrogen　flow　rates　and　the　ordering　of　the　nitrogen　atoms.　Binding　energy　increases　steadily　from　733　eV　to　740　eV　with　the　increasing　thickness　of　thin　films　from　74　nm　to　94　nm.　It　was　observed　that　surface　energy　decreases　as　the　contact　angle　of　glycol　increases　and　changes　the　thin　film　surface　from　polar　to　nonpolar.　TEM　images　indicate　that　cubic　-Fe4N　and　epsilon-Fe3N　nano　particles　oriented　in　preferred　directions　dispersed　uniformly　in　the　amorphous　iron　nitride　matrix.