Electronics Forum | Mon Aug 11 09:21:04 EDT 2008 | davef
Sounds like solder is not taking to the pads of the BGA interposer. Check the solderability of the component.
Electronics Forum | Mon Aug 11 10:55:43 EDT 2008 | realchunks
RoHS BGA. No lead in it.
Electronics Forum | Mon Aug 11 07:27:32 EDT 2008 | eyalg
We had experienced two (2) A BGA which fail (detached) off the board. Surprisingly we noticed that most of solder joints remains on the board leaving perfectly exposed and clean pads on the on BGA package (virgin pads) . Note: No mechanical stress wa
Electronics Forum | Mon Aug 11 10:37:19 EDT 2008 | realchunks
I assume you mean the balls of the BGA, not pads (laugh it up guys - I said balls). If so, you may have a no-lead BGA or a high temp BGA.
Electronics Forum | Mon Aug 11 11:00:40 EDT 2008 | eyalg
RoHS BGA. No lead in it. > RoHS BGA. No lead in it. ok. this is not the case .It was sn/pb type...
Electronics Forum | Mon Aug 11 13:55:09 EDT 2008 | guhansub1
Your defect may be possibly due to black pads, although it is rare on component side. Is your BGA pad finish ENIG? If so, inspection using a SEM can give clues on the presence of black pads
Electronics Forum | Mon Aug 11 14:04:51 EDT 2008 | realchunks
Then your profile is way off. You need a t-couple mounted under the BGA on one of the center balls to measure correctly.
Electronics Forum | Sat Jun 11 03:26:20 EDT 2016 | nagesh
Hi, I have problem with one of the BGA Top Cap Detached from the Solder Balis attached to the BGA. Advice /Suggest why the Top Cap Has come out. We produced 4150 Pieces & had similar problems with 5 Pieces. Thx in advance for all your suggestions. T
Electronics Forum | Mon Aug 11 10:45:04 EDT 2008 | eyalg
I assume you mean the balls of the BGA, not pads > (laugh it up guys - I said balls). If so, you > may have a no-lead BGA or a high temp BGA. hi I mean that the the balls were left on the board and the BGA pads were found clean. What do you
Electronics Forum | Mon Aug 11 10:47:40 EDT 2008 | dphilbrick
Sounds like bad BGA's to me. I suspect this is rare but you can get black pad on the BGA attach pads just like you get them on a PCB. Do you have un-processed BGA's?(still in package) I would have one tested (not by the manufacturer)!
