Electronics Forum | Sun Feb 25 11:59:33 EST 2007 | stepheniii
Just make sure you keep the half done assemblies in dry storage or do the second reflow within the time dictated by the BGAs MSD rating level. Maybe this time you did the second side with a very short wait because you were anxious about the results
Electronics Forum | Sat Apr 27 15:42:53 EDT 2019 | davef
Your ppl are correct, the capacitor is not sealed. So, it is perfectly acceptable for the capacitor to have absorbed moisture. If your ppl don't either prevent moisture absorption or remove the moisture prior to soldering, their component could fail
Electronics Forum | Fri Mar 26 10:35:52 EDT 2010 | grahamcooper22
Hi Krish, thanks for your detailed reply. Sorry I assumed you may be using a solder paste to solder the BGA to the pcb. Either solder paste or Gel flux is best for resoldering BGA to pcb. Are you using Gel flux ? Most popular long term storage for mo
Electronics Forum | Thu Nov 08 04:33:39 EST 2012 | grahamcooper22
Make sure that the 40 degree C oven is getting to less then 5% RH inside especially for any applications where you need to dry components....it may surprise you that many ovens set at 40 C will have an internal RH of @ 20~30%....and that is not dry e
Electronics Forum | Tue Nov 11 13:00:14 EST 2003 | Kevin McCarten
John; Our company supplies Dry Boxes specifically deisgned for the electronics manufacturing environment. We have a variety of products that are capable of handling the various loads that you may request of them (ie; frequently acessed production fl
Electronics Forum | Thu Dec 15 08:04:47 EST 2005 | davef
Snaggie Oxidized nickel is very tough to solder. Using the typical fluxes that are in everyone's fireproof storage cabinet [that they've been sampled by very nice saletypes] is like bringing a knife to a gun fight. Recognize that the flux you want
Electronics Forum | Wed Aug 26 05:58:17 EDT 2009 | grahamcooper22
Hi, I have no experience of the ZIP TOP bag you refer to but my advice is to follow the guideline of IPC JEDEC 33 for sealing bags containing MSDs....it states' the MBB should be heat sealed'. I cannot imagine that a ZIP will keep the moisture out an
Electronics Forum | Wed Nov 16 21:35:07 EST 2022 | stephendo
" so I wander what can I do to save them?" The boards or management? Seriously I think this is more of a management issue than a technical issue. We can suggest what to do but if management does not accept that solution then it won't work. I'm not s
Electronics Forum | Tue May 14 14:48:33 EDT 2002 | fmonette
Hi Dason, Here is some relevant information that you might find useful : J-STD-033, section 7.1.2.2 Dry Box : "Components may be placed in a dry box, capable of maintaining 25+/-5C and less than 10%RH. Nitrogen or dry air may be used." In other w
Electronics Forum | Thu Nov 14 09:43:33 EST 2002 | MA/NY DDave
Hi I will only hit only a few and then bug out. Worked with one large EMS place that has the "fail first" approach to engineering and manufacturing. ( I know I know THEY all do). They didn't store the paste as the mfg suggested, they didn't control
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