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大家好,
最近做2834x-BGA的封装,有点疑问,
之前参照controlsuit中的DM100参考设计,使用的是179脚封装,焊球尺寸0.45/0.55mm,看gerber使用的PCB封装为16.5mil
现在改用256的封装,焊球尺寸0.5/0.7mm,根据DM168中的gerber,PCB封装为15mil,反而变小了,请问是怎么回事?BGA256根据这个尺寸设计没有问题吧,谢谢。