Electronics Forum | Mon Apr 07 13:12:02 EDT 2014 | cyber_wolf
Gary, We are missing something here. I see no evidence of reflow at all. If you have a thermo couple under the inductor, 237 deg with a TAL of 48 seconds should work all day long.(even though it may be on lower end of process window) SAC melts at 21
Electronics Forum | Wed Sep 17 12:30:09 EDT 2003 | russ
I can guarantee that vibrating ovens will be detrimental in double sided reflow for any of the larger parts. I find it interesting about BTU and there "vibrating" oven. I had a couple of these in the early days and they did indeed vibrate. However
Electronics Forum | Wed May 04 17:15:02 EDT 2005 | siverts
Hey Dr . Klein, I think You do it all right... But here it comes: MSD; what does it really means? MS-level; what does it really means? Floor life what does it really means? I'm sorry but I can't answer all these questions right now. It is a complex m
Electronics Forum | Wed Jun 15 08:45:25 EDT 2011 | edmaya33
check your reflow chain. it maybe vibrating causing DPAK to fall at second reflow.
Electronics Forum | Thu Jun 27 13:33:21 EDT 2019 | duchoang
Wash the board or do what ever to get rid of flux /flux residue at the parts before running second side. If you can, use special reflow profile for the second side ( Less heat for bottom side).
Electronics Forum | Mon Dec 04 20:30:40 EST 2000 | Michael Parker
Flavor???? I have always been partial to Wintergreen, but be sure to get it with the Tarter Control for cleaner apertures and baking soda for a brighter finish
Electronics Forum | Mon Mar 29 13:59:27 EST 2004 | jdumont
Well how can I correct this? Would baking the board prior to any operations help? Is this an issue I should get the PCB manufacturer involved with, or something that is common and just live with it?
Electronics Forum | Wed Apr 08 09:09:39 EDT 2009 | tommyttr
That is a delamination. It is indeed from moisture. You need to bake the boards for at least 8 hours and you should be good to go.
Electronics Forum | Thu Apr 16 11:58:20 EDT 2009 | ccross
We have seen this exact same problem. Our vendor agreed it was their problem and also agreed it was a moisture issue within the PCB layers, not the solder mask. We have taken to baking our boards, especially when they are manufactured during the late
Electronics Forum | Fri Feb 13 03:53:40 EST 1998 | Brian S. Bentzen
Hi , I have not been able to find any good description on how to perform double sided reflow on PCBs.The best would of course be to avoid reflowing the bottom side again but in real life this is not possible. So when double sided reflow soldering
