Abstract
A full-wave electromagnetic analysis for characterizing typical electromagnetic shielding practices in ceramic electronic packages is presented. Typically in printed circuit board emissions, the power plane emissions, and exposed surface nets are considered, however, the signal interconnect from the PCB to an electronic package can also be a significant source of radiation and hence an electromagnetic interference (EMI) issue. In this paper we describe electromagnetic radiation mechanisms resulting from high-frequency and high-speed applications in ceramic multilayer electronic packages and review the typical practice of implementing via fences to mitigate and reduce the EMI risk within a package substrate and also for the case when the package is part of a package/board configuration.
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