Impact of multiple radiation leak paths on shielding effectiveness of ground vias in conformal-shielded SiP

This paper presents the shielding effectiveness (SE) of the ground vias in conformal-shielded System-in-Package (SiP) by analyzing three main radiation leak paths separately. The SE of the ground vias can be submerged by radiation from those three paths and the overall SE of SiP is determined by the weakest-shielded path. The method proposed and the findings in the work will assist to decrease the redundant design of ground vias in SiP.