Dear Sir. Recently we had a problem in our production. We had pcbs with no RoHs (with solder Pb in pads) but we used paste Lead Free. I want to know if we will have problems in this solders in the future, because (perhaps)the solder will be broken, or problems like this. If someone knows a study or links with information about this, please send me. It's very urgent. Thanks in advance.
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