the concept of single crystalline InGaO3(ZnO)5 obtained at high temperature of 1400 ํc and laser annealing was explored to produce good quality of c-axis oriented polycrystalline IGZO thin films have been fabricated by R.F. sputtering at room temperature to study their structure, optical transmittance and photoluminescence properties for application as an active channel layer in TFTs. In addition, the impact of annealing on physical properties of ZnO/IGZO thin films and performance ofZnO/ICZO TFTs was investigated and compared with a-IGZO TFTs