In this paper, a new, method of UV-laser-assisted polymerization of iodine-doped polythiophene is presented. For the reason of intrinsic doping during the UV-irradiation, iodinated thiophene is chosen as the basic monomer. Due to the photochemical activation of the thiophene ring by UV-photons, the photoinduced polymerization of thiophene is expected to form thin polymeric layers added with iodine molecules serving as a doping agent. The generated thin polymeric layers are characterized by FTIR and XPS. By these spectroscopic measurements, the mechanism of the UV-photoinduced polymerization process and the simultaneous intrinsic doping mechanism have been clarified. Some rough measurements of the electrical conductivity yield values of low ohmic resistance for the synthesized polymer. (C) 2002 Elsevier Science B.V. All rights reserved.