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Prototipos de PCB de forma sencilla
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Question: Below design caused cold joint at the pads which are connecting to the center big pad.
Red stands for soldermask layer, Blue is for copper layer.
Answer: Better to have soldermask ink between those GND pads and the center pad to avoid solder paste on GND pads to be pulled away.
Correct design: Red stands for soldermask layer, Blue is for copper layer, ref below picture.