Electronics Forum | Thu Feb 14 04:38:43 EST 2008 | marjorie
Anyone knows why BGA fell off sometimes from the board? I was running in a single sided only. I encountered a BGA falling off from the pcb pad. The pcb is ENIG and lead free process. The pads had no solder and didn't looks like having a black pad thr
Electronics Forum | Thu Feb 14 07:34:10 EST 2008 | jdumont
How many fell off out of your entire lot? What was the soldering quality like on the ones that didn't fall off (xray, visual)? You need to determine if its a random problem or if even the ones that stayed on are barely on and go from there. If the o
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 10:37:19 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 | Thu Feb 14 07:49:29 EST 2008 | aj
There was hardly a dropped component or components under the BGA ? just a thought. aj...
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 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)!
Electronics Forum | Thu Feb 14 08:14:12 EST 2008 | davef
Questions are: * Do the BGA pads on the board take solder when you solder them by hand? * What is the temperature on the BGA pads during reflow? * What is the temperature on the other component pads during reflow?
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...
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