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im-tomu / fomu-hardware

Tomu FPGA (Fomu for short), a FPGA which fits inside your USB port!
Creative Commons Attribution Share Alike 4.0 International
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Hacker Fomu #21

Closed slagernate closed 2 years ago

slagernate commented 2 years ago

Why not use a fully symmetric layout for the bga pads in the hacker version? This may help stability of the WLCSP.

slagernate commented 2 years ago

NVM. Misread the gerbers. However, I do wonder if the yield issue is related to the small diameter pads used on the perimeter of the WLCSP.