Electronics Forum | Mon Dec 05 09:22:34 EST 2005 | russ
I'm sure that we have all seen it but it can be from so many different things. Definitely can be from flexing, Are you 100% sure that they are good prior to this install remove process?
Electronics Forum | Mon Dec 05 09:31:19 EST 2005 | whippingpost
Not all but some were tested O.K before the failure. What are some of the other reasons for ball separation from the component body besides mechanical stress?
Electronics Forum | Mon Dec 05 12:41:40 EST 2005 | stepheniii
thermal cycling chemical reactions (can occur slowly) they were only touching before and not really a solid solder joint
Electronics Forum | Tue Jul 25 11:30:47 EDT 2006 | DC
Russ, we had similiar issue on the corner seperation. The board is ENIG and the part is Altera FBGA 1020 (Super BGA) and reflowed by tin/lead paste. Please comment your concern on Altera parts! Is CTE mismatch?
Electronics Forum | Fri Dec 02 19:01:45 EST 2005 | James clark
Somebody knows where I could find information in order to learn how to read a reflow profile. I am new in this topic. Thanks
Electronics Forum | Tue Dec 06 07:55:02 EST 2005 | mmjm_1099
We just recieved our Mirtec today so I will have to get back to you on how we like it.
Electronics Forum | Mon Dec 05 15:42:37 EST 2005 | les
Anyone with definitive reliability data on mixing thru hole lead free terminations (SAC and Sn/Cu) with Sn/Pb solder. Seems like a lot of conflicting information
Electronics Forum | Tue Dec 06 04:38:43 EST 2005 | mskler
check the placement height of the head, That can be checked by manual up & down of head on conveyor the nozzle should just soft touch the conveyor. Also check the down speed of head.
Electronics Forum | Tue Dec 06 05:40:12 EST 2005 | ajay
we also faced similar problem in fuji cp643. addition to your suggestion - mainly in program PCB thickness, component height checked & set correctly , then problem solved.
Electronics Forum | Tue Dec 06 08:11:41 EST 2005 | lwright10
is the Chuck set correctly on the collers, Wide jaw Soft spring & Narrow jaw hard spring. Also check the pick up angle in the feeder file.
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