Electronics Forum | Fri Feb 24 11:32:29 EST 2006 | inds
In addition to the response from Board House... You WILL see delamination at lead-free temp even during reflow.. more often than not.... sometime manufacturer's try to get aways with it by pre-baking the board to remove moisture..but I think one has
Electronics Forum | Tue Nov 14 19:13:21 EST 2006 | russ
You have incomplete plating in the through holes would be my bet, baking will not solve, nothing will, at least that is what I have found except a lot of hand work and frustration, have your PCB house perform cross section at affected area in your
Electronics Forum | Wed Feb 20 09:05:38 EST 2008 | tonyamenson
We had a similar problem with lead-free through-hole components. We baked those baords to remove the residual moisture and everything went to 100% pass - defect was gone. Couldnt hurt to try a sample run while you decide if the PCB holes need to be
Electronics Forum | Fri Feb 01 05:40:17 EST 2008 | aj
we have also seen this issue but seems to be on boards whee there is a open space and no copper hatching. We bake these boards out for 4-6 hrs @ 125oC. aj...
Electronics Forum | Mon Dec 08 18:25:35 EST 2008 | yuepingwu
Hi Bob, Do you have information about IPC D-35 for reference? What moisture sensitive level is the Sn-Pb/RoHS of PWB? Does PWB supplier start to implement PWB drying packaging?
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 | Thu Dec 16 23:17:02 EST 2010 | Jacki
Hi Kim Dun take any risk in delamination bcoz u will be the person to answer for being it. So, we do bake all Pcbs, which have 3months of shelf life, b4 startin any process although they are still inside the factory packs.
Electronics Forum | Fri Apr 08 20:37:09 EDT 2011 | tkirk
Just wanted to say thank you to everyone for your help. We will do a long bake for all future PCBs ordered from this vendor. TK
Electronics Forum | Tue Aug 16 14:01:44 EDT 2011 | emeto
HI, I believe that the problem is moisture in the boards. You should bake the boards in oven for 24hours or so and then run them.
Electronics Forum | Thu Jan 12 13:18:07 EST 2012 | swag
215 to 220 deg.C peak reflow. We bake then store all PCB's in low humidity cabinets (appox. 3% RH) prior to running.
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