请问附图中的PAD位上锡不良 （回流焊）可能是什么原因造成， 手焊没有问题（针对那些上锡不良的PAD位），回流焊曲线没有问题，不良率5%，仅发生在一个批次，表面看不出明显的氧化。。。


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TGAsia是一个为业界同仁提供技术交流的平台。您可以在论坛上提出技术问题，交流行业经验，寻找供应商等。请勿发送任何招聘，广告信息。（注：对于寻求供应商的邮件，请勿回复[log in to unmask],请私下和发件人联系）。如您需要退出该邮件论坛，请直接发送邮件至 [log in to unmask] ,谢谢。