Crackle template based metallic mesh with highly homogeneous light transmission for high performance transparent EMI shielding
Our daily electromagnetic environment is becoming increasingly complex with the rapid development of consumer electronics and wireless communication technologies, which in turn necessitates the development of electromagnetic interference (EMI) shielding, especially for transparent components. We engineered a transparent EMI shielding film with crack template based metallic mesh (CT MM) that shows highly homogeneous light transmission and strong microwave shielding efficacy. The CT MM film is fabricated using a cost effective lift off method based on a crackle template. It achieves a shielding effectiveness of ~26 dB, optical transmittance of ~91% and negligible impact on optical imaging performance. Moreover, high quality CT MM film is demonstrated on a large calibre spherical surface. These excellent properties of CT MM film, together with its advantages of facile large area fabrication and scalability in processing on multi shaped substrates, make CT MM a powerful technology for transparent EMI shielding in practical applications.
Scientific reports