Open AccessSE adjustment of planar mesh screen by fine‐tuning metal thickness
Author(s) -
Corredores Yonathan,
Castel Xavier,
Besnier Philippe,
Dupeyrat Cyril,
Foutrel Patrice
Publication year - 2018
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.0070
Subject(s) - materials science , planar , transparency (behavior) , microwave , electromagnetic shielding , metal , microelectronics , optoelectronics , substrate (aquarium) , electrical impedance , optics , composite material , computer science , electrical engineering , telecommunications , metallurgy , engineering , oceanography , computer graphics (images) , computer security , physics , geology
The study presents the thickness effect of mesh metal films printed onto glass substrate on the shielding effectiveness (SE) of such transparent screens. Currently, standards in microelectronic technology use a metal film thickness of between ∼100 nm and few micrometres, depending on the available deposition and implementation techniques. This study demonstrates that the thickness of mesh metal films is a key parameter which needs to be adjusted precisely. A theoretical model based on SE, complex impedance and optical transparency has been developed for this purpose. At microwaves, a relevant selection of the metal thickness values from 0.1 to 2 µm changes the SE at low frequency (from 36 to 40 dB at 2 GHz, respectively) while maintaining it constantly at a higher frequency (close to 20 dB at 18 GHz). The optical transparency of such mesh screens is kept constant over the entire visible light spectrum (78%). Experimental data are in complete agreement with the theoretical values.