Hello guys,
It is my first time to lay out a BGA, It's a 9x9, so not huge, but it has .4mm pitch so I'm using vias in pads (filled) to breakout the signals.
The bottom layer of the board is empty below the BGA, is it fine to put passives directly below the BGA and use the filled through-holes to go to the bottom of the board and route them directly?
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