Scientists fabricated invisible shield for electromagnetic interference

Scientists from Centre for Nano and Soft Matter Sciences (CeNS), Bengaluru, have fabricated the transparent and flexible EMI shields made of metal meshes using the crack templating method via spray coating which is pioneered in their laboratory.

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Key-Points

The CeNS team has developed a copper metal mesh on polyethylene terephthalate (PET) sheet as its substrate, which exhibited a visible transmittance (T), a parameter of visible transparency of about 85% and sheet resistance (Rs) ~ 0.83 ohm per square.

Instead of continuous film of metal (Cu) coating on any transparent substrate (glass, PET) where transparency can be compromised.

In this method, the CeNS team has deposited metal mesh networks on the substrate, which covers only 7% area of substate, unlike 100% coverage of continuous film.

This makes metal mesh transparent compare to continuous metal film. Metal mesh provides better electromagnetic shielding compare to same thickness of continuous metal film where transparency can be compromised.

This metal mesh can be created on any desired substrates such as acrylic, polycarbonate, glass, etc. without compromising the conductivity of the electrodes.