Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


BGA with gold corner / reflow problems

James

#24963

BGA with gold corner / reflow problems | 25 June, 2003

Does anyone else have the same problem with BGAs that have a gold corner. It looks like the area where the gold corner is, it does not want to reflow proberly but the rest of the BGA reflows fine. Any suggestions????

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RDR

#24965

BGA with gold corner / reflow problems | 25 June, 2003

I battle this all the time, I don't believe that it is the "gold corner" that is causing the problem but something with the PCB layer makeup (copper planes, or bottom side components, etc.). It could also be the nozzle you are using has a "hot spot/coldspot". To verify I would put the BGA on 180 Deg. out of rotation and try it again and see if it follows the corner of the part or the location of PCB.

Let us know what you find.

Russ

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