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Board Talk
At Board Talk, the Assembly Brothers cut through the marketing hype, the platitudes and incompetent un-scientific baloney with a search for the truth.
This episode features:
Phil Zarrow, ITM ConsultingPhil has been involved with hybrid and PCB assembly for more than 30 years including equipment design for pcb fab and assembly. 
Jim Hall, ITM ConsultingJim has a wealth of knowledge in soldering and thermal technology, equipment and process basics and is a pioneer in the science of reflow technology.
What's happening at SMTA International?
 Oct 24: The Deadly Sins of SMT and Lead-Free Assembly Oct 25: Advanced SMT Manufacturing Learn More ... |
Rework Lead-Free Boards with Leaded Solder
Comments Situation: In house repair facility for boards from various vendors. A board may bear a ROHS label, but the lead free solder alloy is not known. What is the best rework procedure? Clean off original solder residue first, or just use any lead free alloy and not worry about the resulting mix? J.M. In your "board talk" concerning repairing lead-free joints with tin-lead, I believe you said, in-part, "If the board is used in a high stress environment then the tin-lead is more reliable but if its a low-stress environment then the lead free repair is more reliable". If I heard you correctly, could you educate me brifly as to why? I would have thought the repair best suited for a high-stress environment would always be more reliable in any situation. What am I missing here? B.S.
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