Werner, 

What I've been finding has more to do with testing an assembly's ability to 
withstand mechanical stress, and making projections from there.  We know 
we're far exceeding that.  That's our first step - retraining.  What I think I'm 
going to need to provide is some data about how confident we can be in 
keeping products alive if we can't be sure the joints aren't partially cracked.  
I'm really fighting an uphill battle here.  We're not willing to spend the money, 
we have an inadequate facility, and they want me to tell them how OK it 
might be, since they REALLY don't want to stop production of our flagship 
product.

As for "common" problems, I'm suppose I'm referring more to a common 
symptom of the problem - the reason many BGAs have GND pins in the 
corners.  That's where the stress shows up first.

And I wish I had a Dew for every time I've suggested a consultant - this is SO 
not my area of expertise!  (and yes, your name is likely to come up again....)

-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-------------------------------------------------------------------------------