Hi Tech Gurus,

As people talk more and more about Lead free, I keep hearing that standard FR boards might not be able to take the extra heat required for a reliable Lead free solder joint. The problem is that I keep hearing the word MIGHT. I have not heard that this is definitely true and, if it is true, I have not heard anyone offer a cost effective solution. So, I am asking the many experts on this forum, will standard FR4 be able to handle the higher excursions (particularly, let's say, for a 7" X 9",  8 layer, double-sided SMT, .062" 5/5 board) associated with Lead free solder paste? If not, what would be the most cost-effective offering (i.e. high Tg FR4)?

Thank you, 
Paul Black 
Manufacturing Engineer 
Kronos 

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