In this work we present first results on the synthesis of vanadium oxide semi-transparent conducting thin films of p- and n-types. The films were deposited by thermal evaporation method in vacuum, on: silicon, glass, sapphire, and gold substrates. Temperature of substrate during deposition was set around 250 degrees C. As deposited films were of a p-type of conductivity. Thermal annealing at 420 degrees C of as-deposited films in air at atmospheric pressure resulted in a change in the conductivity type. Optical, electrical and thermal properties of the deposited films were studied. The topography of the films was studied using AFM microscope. P-N structures were created using VOx films on silicon and glass substrates. Electrical measurements had shown a non-linear behaviour of the samples. (c) 2007 Elsevier B.V. All rights reserved.