Electronics Forum | Tue Jul 19 21:24:04 EDT 2005 | davef
This is a bit dated, but it'll give you a starting point. test lab failure analysis IC; Accurel Materials Analysis Group (FIB, FESEM,TEM) 785 Lucerne Dr Sunnyvale, CA 94086; 408-737-3892 Fax 3916 Suzanne Francisco X146 suzannef@accurel.com test la
Electronics Forum | Thu Mar 26 19:13:15 EDT 2015 | vladig
Right. That's what we normally do for our customers in order to just qualify a process. I'd just add X-ray, particularly on a large BGAs. Regards, Vlad SENTEC TESTING Laboratory Inc.
Electronics Forum | Thu Jan 15 21:16:18 EST 2009 | davef
Our first impulse would be to blame someone else. We'd send some of the DPAK from inventory to: * Supplier * Outside failure analysis laboratory ... for delidding and analysis
Electronics Forum | Fri Aug 22 09:49:31 EDT 2003 | davef
Ask your supplier for a corrective active and failure analysis of the boards. In parallel, send the boards to a failure analysis laboratory to determine the material on your gold pads. Take your work to another supplier.
Electronics Forum | Sun Oct 19 08:11:12 EDT 2008 | davef
While you're waiting for others to reply to your question on component analysis laboratories, search the fine SMTnet Archives to find posts like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=35636
Electronics Forum | Tue Jan 20 17:00:05 EST 2009 | davef
For lack of a better description, we'd say, "Yes, that could be corrosion." Regardless of what you call it, it looks nasty and should not be allowed on bare boards of any sort. Based on your picture, we can't tell you whether it's related to your con
Electronics Forum | Mon Nov 17 21:30:10 EST 2003 | davef
Odds are that all of the completed product had corroded leads, if the components came from the same load / were processed similarly. ... but the issue is NOT corroded leads. The issue is well soldered connections. * If the solder connections on the
Electronics Forum | Tue Apr 17 12:39:29 EDT 2001 | davef
Continuing with Steve's comments, the true measure of whether or not residues [NC or not] are good or bad is found in the results of an laboratory analysis of the residues and an assessment of the impact of that level of residue.
Electronics Forum | Mon Jan 21 19:22:38 EST 2008 | davef
In your situation, the issue is the compatibility of your flux residues and the encapsulant that you choose. First, contact your encapsulant supplier for advice. They've likely been down this road with other customers and may be able so save you som
Electronics Forum | Tue Nov 25 22:25:24 EST 2003 | davef
We had a similar problem on the high impedance front end of a MOSFET amplifier a few years ago. If your situation is like ours, the issue is not what a consensus specification [like J-STD-001] defines as an upper limit, but what your product is defi
