Electronics Forum | Mon Feb 28 23:08:48 EST 2011 | kemasta
Davef I tried to click the "Attachment" button, but it trigger "Post" button, so I can't attach the picture here.
Electronics Forum | Thu Mar 03 08:06:36 EST 2011 | scottp
I've seen this with through hole via in pad with soldermask plugging from the opposite side. Baking the boards solved it. Not using such a horrible via in pad method would also have solved it, but that wasn't an option. Is this ball sitting on a v
Electronics Forum | Fri Mar 04 00:46:36 EST 2011 | kemasta
Hi ScottE "Is this ball sitting on a via?" I am not sure is I answered your question correct, the ball is sit on the pad.
Electronics Forum | Wed Mar 09 17:01:10 EST 2011 | davef
We don't think your voiding is related to your bridging. We'd guess: * Voiding is either poor material selection or improper process recipe choice * Bridging is sloppy process management
Electronics Forum | Mon Mar 21 17:36:44 EDT 2011 | davef
Kim: You could be correct. We had a batch of BGA that had a weird bridging pattern. Could not figure it out. So, we put the whole batch straight out of the 'box' bug-up on a hot plate and video recorded the balls as we took them through a thermal cy
Electronics Forum | Mon Mar 21 02:54:58 EDT 2011 | kemasta
Hi Dave I agree with the 2nd point (sloppy process management) if the failure rate is higher than 5%. But this is 0.083% case, and only happen once in the blue moon. As I study about the re-flow profile for the last whole week, current parameter se
Electronics Forum | Mon Nov 12 08:42:59 EST 2001 | madreindeer
HI, I would say around 80Kv 5-8um focalspot should be OK. Check systems like CR Technology,Phoenix,FeinFocus these are nice systems. There is low cost system Glenbrook any good I do not know. Good luck, MadReindeer
Electronics Forum | Mon Nov 12 11:05:43 EST 2001 | vbutani
You can get systems at various performance levels depending on your budget. The low cost systems are a great way to start off and then you can upgrade to a higher performance unit when you move to finer pitch components. Check out the VJ-1000LP at h
Electronics Forum | Wed Nov 14 10:23:51 EST 2001 | gzweig
This question and other issues on x-ray inspection of BGAs are addressed in the free PDF. publication available by e-mail entitled: Rapid and Effective X-ray Inspection of BGAs using "Signature Identification" Just place "send publication" in subj
Electronics Forum | Thu Mar 03 02:00:37 EST 2011 | kemasta
I tried, but error:- Attribute validation error for tag CFFILE. The value of the attribute destination, which is currently /var/www/smtnet/Forums/Attachments//, is invalid. The error occurred on line 12. Try go to this url and view:- http://img845.
