Influence of a Floating Plane on Effective Ground Plane Inductance in Multilayer Packages
The impact of a floating metal layer on the effective ground plane inductance has igated for multilayer packages with ground planes. Both thick and thin tries were examined. It was seen that the floating plane actually increases plane inductance in the multilayer package. An explanation for this is given by examining the current density in the floating and ground ground plane partial self-inductance and ground-signal partial mutual developing a package. Even unintentional metal layers such as heat potentially add to switchng noise in a multilayer package, especially if th close proximity to ground and signal layers.
KeywordsThick Film Ground Plane Floating Plane Effective Inductance Signal Trace
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