Electrically Insulating Electromagnetic Interference Shielding Materials: A Perspective

Abstract

Electromagnetic interference (EMI) shielding is critical in electronic applications. Over the past decades, numerous high-performance EMI shields are developed using electrically conducting materials. However, from an application aspect, EMI shielding materials, integral to the increasingly complex electronic systems, often need to be electrically insulating to prevent short-circuiting and enhance overall application reliability and flexibility. This requirement has frequently been overlooked in earlier research on EMI shielding materials. This paper summarizes the representative advancements in the design of innovative EMI shielding materials that minimize and eliminate reliance on electrical conductivity. Insights into the future prospects and directions for the development of electrically insulating EMI shielding materials are also provided, with the aim of pioneering materials that are both intrinsically insulating and effective at EMI shielding.