Highly　crystallized　barium　tungstate　(BaWO4)　thin　films　with　dumbbell-like,　kernel-like,　bowknot-like　and　cauliflower-like　microstructure　were　synthesized　from　an　aqueous　solution　containing　barium　nitrate,　ethylenediamine　tetraacetate　acid　disodium　and　sodium　tungstate,　via　mild　microwave　assisted　chemical　bath　deposition　process.　The　resulting　BaWO4　films　with　different　morphologies　were　characterized　by　X-ray　diffraction　spectrum,　scanning　electron　microscope,　Raman　and　photoluminescence　spectra.　The　results　indicate　that　the　morphologies　of　final　products　significantly　depend　on　the　reaction　conditions　including　the　reaction　time,　the　initial　concentration　of　precursor　reagent　and　the　physicochemical　characteristics　of　the　Substrates.　Furthermore,　the　oriented　aggregation　mechanism　is　proposed　as　a　possible　formation　mechanism　of　the　films　with　specific　morphologies.　(C)　2009　Elsevier　Inc.　All　rights　reserved.