TRANSPARENT FILMS FOR ELECTROMAGNETIC SHIELDING OF PLASTICS
F. Sarto1, M.S. Sarto2, M.C. Larciprete3
and C. Sibilia1
1 ENEA, Advanced Physical Technologies Unit, Via Anguillarese 301-00060 Rome,Italy
2 University of Rome "La Sapienza", Department of Electrical Engineering,
via Eudossiana 18, 00184 Rome, Italy
3 INFM at Dipartimento di Energetica, Universita di Roma "La Sapienza"
Via A.Scarpa 16 00161 Rome, Italy
The interest in the development of lightweight transparent electromagnetic (EM) shields
for the radio frequency range has been growing up in the last years together with the expansion of
the electronic market and the increasing use of plastics. Example of industrial applications are
video displays of electrical and electronic apparatus, of electromedical devices, of portable
electronic equipment. Applications in the aerospace sector are also very attractive, such as in
protecting the electronic systems of aircrafts from the high-intensity electromagnetic fields
emitted by radio emitters, TV, radars and telecommunication systems. Moreover, the recent limits of
radio frequency electromagnetic fields suggest the use of transparent shields for building windows.
Thin films can provide an effective solution in EM shielding of plastic substrates or enclosures.
In particular, the use of 1-D photonic band gap structures named as "transparent metals" has been
recently investigated and tested for EM shielding applications in the radiofrequency range, by
using physical vapor deposition technique. In this work, the design method and the technological
issues concerning the realization and electromagnetic testing of the shields will be described.
Some recent results will be presented, and both perspectives and limits of the proposed technique
will be discussed and compared with other solutions.
full paper (pdf, 134 Kb)