Electronics Forum | Mon Sep 26 14:09:08 EDT 2005 | slthomas
"Note: nothing changed to the process, the problem come out of sudden." Did this happen with a batch of boards you'd been running a while, or was it a new batch (lot/date code)of boards? I'd be inclined to suggest that the environment that your my
Electronics Forum | Fri Jun 25 01:11:31 EDT 1999 | Vinesh Gandhi
| | | Recently, there has been an upsurge in the Pin Hole/Blow Hole problem in our wave soldering process. We are baking the PCBs for 2 Hrs. at 125 degree C. The Wave Soldering profile seems to be O.K. Still the problem is persistent. Can somebody
Electronics Forum | Fri Jan 22 14:24:44 EST 1999 | Dave F
| I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | Michael: Let's take a different angle on this. Why not ha
Electronics Forum | Fri Jan 22 17:38:07 EST 1999 | Michael Larsen
| | I was just wondering what solutions are out there for dry storage. Our basic need is to be able to store boards that have been baked and need to remain moisture free for up to a week. | | | Michael: Let's take a different angle on this. Why
Electronics Forum | Thu Aug 08 12:10:18 EDT 2013 | horchak
I have never heard of steaming PCBs. Wouldn't this induce moisture into the PCB and cause more delamination and out gassing? The only way to fix delamination, providing your manufacturing processes are in line is to find a new PCB fab house that can
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 | Thu Dec 04 09:49:11 EST 2008 | lazzara55
Dear Steven: Often the recommendations for baking prior to assembly are derived from various J-stds. But J's currently concern baking moisture out of components, and fail to address the moisture issues of the PCB. Because of that, there is the IPC D
Electronics Forum | Mon Mar 31 01:20:42 EST 2003 | Bryan Sheh
I agree that we should bake the pcb at higher temp and for longer time.for example...95--115c for at least 4 hours. also,keep the temp from 150--170c ,60-90 seconds while preheating. completely keep the moisture and volitales out of pcb and solder pa
Electronics Forum | Sat Aug 07 11:14:19 EDT 1999 | JohnW
| | Mike, | | | | Got your message and those of others concerning PCB fab supplier evaluation and qualification check lists, etc. I have a severe problem here in WI as I can hardly access the internet, and when I do it is cut off abruptly for no goo
Electronics Forum | Fri Feb 28 01:10:32 EST 2003 | MA/NY DDave
Hi I don't know what FR4 you are using, so check it out to make sure 125 isn't too high. I have seen this done occassionally when the PCBs have bad moisture or other problemx where baking helps prior to assembly and solder, yet I haven't seen it do
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