Eco-Friendly Scalable Manufacturing Silver Transparent Сonductive Mesh and Silver Micro Caps, in One Technological Cycle for Efficient EMI Shielding Materials for 5G Communications

Anton S. Voronin; Yu. V. Fadeev; Fedor S. Ivanchenko; Мichail M. Simunin; Ilya V. Govorun; Ivan V. Podshivalov; Pavel A. Mikhalev; Mstislav O. Makeev; Ivan A. Damaratskiy; Dmitriy S. Ryzhenko; Gleb Yu. Yurkov; Igor A. Tambasov; Sergey V. Nedelin; Nikita A. Zolotovsky; Dashi D. Bainov; Maxim S. Molokeev; Anna V. Lukyanenko; Ksenia A. Shabanova; Stanislav V. Khartov

doi:10.20944/preprints202309.0037.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 30 August 2023 / Approved: 31 August 2023 / Online: 1 September 2023 (10:57:38 CEST)

For the first time, an environmentally friendly waste-free closed cycle for the formation of EMI shielding materials that are promising for 5G communications is considered. Based on the proposed closed technological cycle, two types of EMI shielding materials have been obtained; both materials have significant prospects for signal shielding in all ranges that are allocated in different countries for 5G communication. The first type of materials are transparent conductive meshes with a transparency of more than 80% and with a shielding efficiency of more than 40 dB in the S and L bands and about 30 dB in the K and Ka bands. The study of signal reflection characteristics in the S, L, C, K and Ka bands showed the promise of using these materials as transparent 5G signal reflectors. The reflection coefficient in all considered ranges is above 90% (-0.5 dB). The second type of shielding material are continuous silver micro caps films characterized by a shielding efficiency of 90.1 dB at a thickness of 6.2±1.2 µm. We have also shown that silver micro caps can separate into silver flakes and ribbons when sonicated. These materials can also be used to produce EMI shielding coatings and composites. A detailed analysis of the shielding properties showed that each type of materials obtained in a closed technological cycle is comparable with the best literature results and significantly wins in terms of cost.

5G; transparent conductive mesh; micro caps; flakes; ribbons; cracked template; electromagnetic interference shielding

Chemistry and Materials Science, Surfaces, Coatings and Films

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Eco-Friendly Scalable Manufacturing Silver Transparent Сonductive Mesh and Silver Micro Caps, in One Technological Cycle for Efficient EMI Shielding Materials for 5G Communications

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