Abstract
The management of the electromagnetic interference (EMI) of thin, light, and inexpensive materials is important for consumer electronics and human health. This paper describes the development of conductive films that contain a silver (Ag) flake powder and multiwall carbon nanotube (MWCNT) hybrid grid on a polytetrafluoroethylene (PTFE) film for applications that require electromagnetic shielding (EMS) and a conductive film. The Ag and MWCNT hybrid grid was constructed with a wire diameter and spacing of 0.5 mm. The results indicated that the proposed conductive films with 0.4 wt% MWCNTs had higher electromagnetic shielding effectiveness (EMSE) and electrical conductivity than those with other MWCNT loading amounts. The results also showed that the film with 0.4 wt% MWCNT loading had a high 62.4 dB EMSE in the 1800 MHz frequency and 1.81 × 104 S/cm electrical conductivity. This combination improved stretchability, with 10% elongation at a 29% resistivity change rate. Conductive films with Ag/MWCNT electronic printing or lamination technologies could be used for EMI shielding and electrically conductive applications.
Highlights
Traditional materials that can be used for electromagnetic shielding are metal, ceramic, and plastic materials
The high transmission efficacy and large number of high-power components that are used in radio frequency (RF) antenna modules and base station basic circuits, e.g., integrated circuits (ICs), system on a chips (SoCs), system in packages (SiPs), antenna in packages (AiPs), power amplifiers, switches, and passive components, cause substantial heat problems
An Ag/multiwall carbon nanotube (MWCNT) composite conductive paste was applied to a PTFE film, using a screen
Summary
Traditional materials that can be used for electromagnetic shielding are metal, ceramic, and plastic materials. During low-frequency magnetic field shielding, absorption loss is more important than reflection loss, so steel, plastic materials, or high-permeability magnetic materials are generally used; during high-frequency magnetic field shielding, reflection loss is rather critical, aluminum foil or conductive coating materials are selected [1]. The large number of sensing elements used in self-driving systems means that people will be exposed to GHz UHF (ultrahigh frequency) transmission; the issue of the impact of electromagnetic waves on human health will come to the fore [2,3]. As long as the electrical equipment is properly grounded and the transformer equipment is shielded by electromagnetic shields in new residential projects, the harm from low-frequency electric fields can be greatly reduced. Tghooedaverage bending ability of the conductive silver paste (AG-1003, HongChen Materials Corporation, Taiwan).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
