EMC shielding in power electronics multilayers with conductive permeable material

Abstract

The multilayer technology where passive components are integrated in printed circuit boards is one of the interesting projects to obtain a volume reduction of classical circuits. Using layers of conductive permeable materials in the multilayer architecture the same layer is performing both the EMC-shielding of stray fields and works as the core for the integrated inductive components. In this paper the screening effect of a permeable conductive layer close to an inductive component inside of a multilayer structure is investigated analytically and verified by measurements. An additional view on the self inductance value of the planar component completes the results