Prototipos de PCB de forma sencilla
Servicio completo para prototipos de PCB personalizados.
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.