Fluorine doped tin oxide (FTO) films were successfully prepared on glass and quartz substrate at a substrate temperature equal to 450 ℃ for different fluorine doping (0, 0.05, 0.1, 0.15) by a homemade spray pyrolysis technique. The spray solution prepared from tin tetrachloride pentahydrate ( 4 · 5 2 ) dissolved in distilled water at (0.1 ) concentration and ammonium fluoride ( 4 ) was added into the solution for fluorine doping. X-ray diffraction patterns of the spray-deposited (SnO 2 : F) films for different fluorine doping show that all the diffractograms contain the characteristic SnO 2 orientations. The matching of the observed and standard d-values confirm that the deposited films are of tin oxide with tetragonal structure and the films are polycrystalline with (110) as a preferred growth orientation. The surface morphology of 2 : thin film has been examined by atomic force microscopy (AFM). The average transmittance in the visible region (at 550 nm) has been found (40 %, 47 %, 52 %, 59 %, 61 %) for the fluorine doping (0, 0.05, 0.1, 0.15, 0.2) respectively.