Curt: When trying to diagnose a BGA issue (besides asking lots of process questions to try to get to a potential root cause or generate a fishbone diagram), the analytical testing we start with is: 1. Visual 2. Endoscope 3. X-Ray (need the right tool to see the ball/board and ball/interposer interface, concentricty, etc) Once we get through the above then typically the next steps are: 1. Dye and pry (see what the extent of the problem is) 2. X-Section (zeroing in on a location) We can then move on to a multiple of follow up testing........ Hope this helps.... Bob Wettermann/BEST Inc On Thu, May 1, 2014 at 8:55 AM, Pete <[log in to unmask]> wrote: > Curt, > > As far as a test lab, I've had good success with Celestica in the past. > > As far as the testing you need, if you are doing FA on a BGA, X-ray is > nice to see if you have a problem, Dye & Pry is nice to help understand the > location and scope of the problem, but you really need cross section > analysis (SEM/EDX) to analyze the failure mechanism. Skipping the cross > section will save you time now bust cost you much more time over the next > month. > > Pete > -- Bob Wettermann BEST Inc [log in to unmask] Cell: 847-767-5745 ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________