EMC Question of the Week: May 5, 2025

an IC with three ground pins connecting to the ground fill on Layer 1

If a multi-layer printed circuit board has a solid ground plane on Layer 2, then a ground fill on Layer 1 is usually not recommended. This is because filling empty areas of Layer 1 with ground often increases the 

  1. magnitude of the eddy currents
  2. isolation between signal traces
  3. inductance of connections to ground
  4. cost of the board

Reveal Question of the Week - Answer 250505