Bi 2 Sr 2 Ca 1 Cu 2 O 8+δ (Bi-2212) films were grown on (100) oriented SrTiO 3 (STO) substrate using sol–gel spin-coating method. The effects of heat treatment conditions and coating times on the phase formation and surface morphology were investigated using thermal analysis, optical microscope, X-ray diffraction, and scanning electronic microscopy. Mixed phases were formed from 820 to 840°C, and Bi-2212 single phase was obtained at 830°C for 3h. c-axis epitaxial films with smooth surfaces were obtained by drying at 600°C and coating for 5 times.