Electronics Forum | Wed Apr 23 19:00:39 EDT 2008 | stevek
It depends on the laminate but a PWB is like any other MSL component. Some fab shops are only waranting standard FR4 laminates for 45-60 days when processed at lead free temperatures. The best thing I can say is to try some weight gain/loss experim
Electronics Forum | Tue May 15 21:57:06 EDT 2001 | davef
Welcome!!! Where the hay ya been??? Sorry bud, were lining-up with your fab [it hurts me to say that, but when yer ] We used to dry pack with desiccants, also. Its probably an old MIL-STD-2073-1C requirement [er something like that]. We qui
Electronics Forum | Wed May 16 08:48:12 EDT 2001 | ohboy
I been a bunch o' places...! Some good, some bad, re-inventing the wheel in many cases. Our specs are pretty specific in a lot of cases, but that doesn't mean they always get followed. It usually becomes a case of "It's not quite right, but we rea
Electronics Forum | Tue Apr 26 11:22:48 EDT 2005 | denismeloche
I have found that Sn62 solder gives better strength and leach resistance when soldering to gold surfaces. The gold needs to be at least 5 to 10 micro inches thick to prevent nickel oxidation but if over 25 micro inches will cause brittleness. I hav
Electronics Forum | Sun Mar 07 08:33:37 EST 2010 | joseph_smile
HI GET ME INFO ABT PCB OXIDIZATION WITH REGARDS JOSEPH
Electronics Forum | Sun Mar 07 09:31:01 EST 2010 | davef
If you could fill-in the blanks, it would be easier to help you. For instance, questions are: * What is is the oxide that you want to understand better? * What would like to do with the oxide? * Where is the oxide located? * What are the results of
Electronics Forum | Mon Mar 08 19:19:14 EST 2010 | joeherz
This is what you call fishing with no bait.
Electronics Forum | Mon Mar 08 20:10:33 EST 2010 | davef
How about this: http://en.wikipedia.org/wiki/Redox
Electronics Forum | Thu Jun 09 14:45:21 EDT 2011 | kahrpr
Does the board look like that before Reflow?
Electronics Forum | Fri Feb 03 12:01:18 EST 2006 | Guillermo Hdz
Does anybody know how could I clean pcbs with immersion silver finising ? I have several boards that got oxidized for having been waiting too long to be processed after opening the package.
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