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.
Electronics Forum | Thu Apr 14 09:45:58 EDT 2016 | emeto
Why don't you fix the PCB flatness instead? If that is not the problem, I will check the part warping during the reflow process.If the part is large as you mentioned, it probably warps a lot during reflow. Try to bake the parts in front,based on MSL
Electronics Forum | Wed Sep 22 15:03:46 EDT 2021 | emeto
Excessive baking can actually lead to oxidation and create solderability issues. Why would you profile with empty board? But even if you do that, better use solder sample board.
Electronics Forum | Thu Oct 21 09:08:32 EDT 2021 | korb23
Ive done this before and it seemed fine for me although id didnt bake it more than twice.
Electronics Forum | Thu Mar 03 14:01:16 EST 2022 | chris007
Hello Baking before solder pasting and reflow actually due to poential moisture development. This is JDEC requirement I believe to do so. We AOI after cleaning so we AOI a clean PCBA
Electronics Forum | Mon May 15 12:36:12 EDT 2017 | edhare
I don't believe there should be any issues with > the HASL finish. The issue is how long on the > shelf and is a bake out required to remove > moisture from PCB, as in any FR4 PCB's that may > have had time to absorb moisture. > I don't believe
Electronics Forum | Tue Sep 05 11:18:54 EDT 2000 | Chris May
Pascal, Hopefully, the system that you invest in will have a programmable drying cycle as one of its features. As far as humidity content is concerned, I am sure that some more learned colleagues may be able to help you. Although, I believe some p
Electronics Forum | Thu Jun 20 04:53:13 EDT 2002 | hany_khoga
Thanks Dave but unluckily my sweet BGA�s are surrounded by plastic connectors with hundreds of pins. Also my PCB�s are 4-layers so just thinking of doing what you suggest means ruining them for me. To be honest I tried bypassing the baking issue bef
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