Strontium and calcium-modified lead titanate (Pb 0.70 Ca 0.15 Sr 0.15 )TiO 3 soft chemistry-derived thin films were prepared on platinum-coated silicon substrate by spin-coating method. Investigations were made on the structure, surface morphology and electrical properties of the film. The results by XRD and FE-SEM showed that the film exhibits a pure tetragonal perovskite phase and an average grain size of about 50–60nm, respectively. Electrical measurements of a metal–ferroelectric–metal type capacitor exhibited a stable and switchable electrical polarization in the film. The structure of the Au/PCST/Pt capacitor showed well-saturated hysteresis loops at an applied voltage of 300kV/cm with remanent polarization and coercive field values of 22μC/cm 2 and 100kV/cm, respectively. At 100kHz, the dielectric constant and the dielectric loss of the (Pb 0.70 Ca 0.15 Sr 0.15 )TiO 3 thin film with thickness 240nm were 528 and 0.05, respectively.