Radar absorbing materials based on titanium thin film obtained by sputtering technique
doi: 10.5028/jatm.2011.03030511

Viviane Lilian Soethe*
Technological Institute of Aeronautics
São José dos Campos/SP – Brazil
vivianes@reitoria.ufsc.br

Evandro Luis Nohara
University of Taubaté
Taubaté/SP – Brazil
evandro.nohara@unitau.br

Luis César Fontana
University of Santa Catarina State
Joinville/SC – Brazil
fontana@udesc.br

Mirabel Cerqueira Rezende
Institute of Aeronautics and Space
São José dos Campos/SP – Brazil
mirabelmcr@iae.cta.br

*author for correspondence

Abstract:
Titanium thin films with nanometer thicknesses were deposited on polyethylene terephthalate (PET) substrate using the triode magnetron sputtering technique. It was observed that the titanium thin film-polymeric substrate set attenuates the energy of the incident electromagnetic wave in the frequency range of 8 to 12 GHz. This result allows to consider this set as a radar absorbing material, which may be employed in automobile, telecommunication, aerospace, medical, and electroelectronic areas. Results of the reflectivity show that the attenuation depends on the thin film thickness, as a determining factor. Thin films with 25 to 100 nm thickness values show attenuation of the electromagnetic wave energy from around 20 to 50%. Analyses by Rutherford backscattering spectrometry provided information about the thickness of the thin films studied. Hall effect analyses contributed to better understand the influence of the thin film thickness on the electron mobility and consequently on absorption properties.

Keywords:

Radar absorbing material, Magnetron sputtering, Thin film, Titanium.

J. Aerosp.Technol. Manag., São José dos Campos, Vol.3, No.3, pp. 279-286, Sep. - Dec., 2011
Received: 17/02/11
Accepted: 25/08/11