SE adjustment of planar mesh screen by fine‐tuning metal thickness. Issue 4 (12th April 2018)

• Record Type: Journal Article
• Authors: Corredores, Yonathan; Castel, Xavier; Besnier, Philippe; Dupeyrat, Cyril; Foutrel, Patrice
• Is Part Of: Journal of engineering. Volume 2018:Issue 4(2018)
• Page Start: 239
• Page End: 241
• Publication Date: 2018-04-12
• Subjects: optical films -- electromagnetic shielding -- visible spectra -- metallic thin films -- transparency; mesh screens -- SE adjustment -- planar mesh screen -- fine‐tuning metal thickness -- mesh metal films -- glass substrate -- shielding effectiveness -- transparent screens -- metal film thickness -- implementation techniques -- optical transparency -- metal thickness values; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.0070
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : 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.