Iron　nitride　thin　films　of　different　compositions　and　thicknesses　were　deposited　on　flexible　polymer　substrate　in　Ar/N-2　atmosphere　by　reactive　magnetron　sputtering　under　varying　nitrogen　flow　rates.　The　nano　structured　films　were　characterized　by　X-ray　diffraction,　UV-visible　spectrophotometer,　electrochemical　impedance　(EIS),　atomic　force　(AFM)　and　transmission　electron　microscopies.　The　dependence　of　their　functional　properties　on　coating　and　growth　conditions　was　studied　in　detail.　It　was　found　that　the　thin　films　show　a　uniform　permeability　in　the　frequency　range　of　200　MHz　to　1　Ghz　and　can　be　used　in　this　range　without　appreciable　changes.　Decrease　of　nitrogen　flow　rate　resulted　in　the　smoother　surfaces　which　in　turn　increase　transmittance　quality　and　corrosion　resistance.　Functional　properties　are　dependent　of　nature,　relative　concentration　of　the　iron　nitride　phases　and　film　thickness.　Surface　integrity　is　excellent　for180　nm　thick　sample　because　the　films　appear　to　be　very　dense　and　free　from　open　pores.　By　keeping　sputtering　power　stable　at　110　W,　nitrogen　flow　rate　of　10　sccm　was　ideal　to　develop　the　ferromagnetic.　gamma＇Fe4N　phase　at　room　temperature.