Is anyone using standard FR-4 material for ROHS? All I have ever seen to indicate the need to go to a high tg/td board is that the material may fail after repeted rework. I have a customer that is trying to use IS-410 and it is causing electrical problems because of the dielectric properties. FR-4 works fine for them. Seems to me we should just proceed with FR-4 and if for some reason we would need to rework them multiple times we can pitch them if there is a problem.
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