stitching

Hi all, I have a 4-layer PCB with a below layer-stack and I will be having a net that is supposed to handle 100A. I know I should use a heavy copper PCB instead of this 4-layer PCB but to save cost I stitched 4 polygons on all layers with (0.5 hole size, 1 diameter) vias to accommodate the high...

Hello guys, I was wondering when ground stitching 2 ground layers, what kinda pattern and spacing I should follow to place vias? and should I use more vias near components/pads that dissipate more heat? As for shielding, Is it only used in RF boards or it doesn't matter!! And if someone can...