In the original post,refers to the MCPCB's as possibly being problematic. There have been suggestions of several solutions for their redesign, and later, some ways to redesign the emitter package as well. Reinventing the wheel and the cart it goes on, so to speak. Fascinating reading, for sure!Originally Posted by cmacclel
However, my question is, what can be done to the existing emitter/MCPCB setup? I don't have my stars yet, but feel one of the most important problems that might be faced is a poor reflow job, as I suspect they are done "in house". A few posts back, I mentioned a possible way to tell. In the first post, fifth picture of this thread, ArsMachina posted a very good picture that shows what I was referring to. What I see is solder around the + and - pads and only flux around the thermal pad. Would this not indicate that the reflow was incomplete on the thermal pad?