Hi Everyone,

I have a board with a 357 pin PBGA. Each pad has a short etch leading to an adjacent via. Currently, the fabrication drawing calls for each via to be plugged. The assembly process for this board does not contain a wave solder step and the test engineer assures me that plugging the vias is not necessary for vacuum during incircuit testing, so is there some other reason for plugging these vias? They are plugged with soldermask, and I feel like we are unnecessarily introducing potential problems into the process.

Thanks in advance for your opinions.

Paul Black
Manufacturing Engineer
Kronos
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