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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


BGA Rework

Bryan Warner

#11113

BGA Rework | 9 June, 1999

Does anyone have thoughts on BGA rework. We now use the OK BGA 3000 and now am considering an Infrared machine. Any thoughts?

reply »

Earl Moon

#11114

Re: BGA Rework | 9 June, 1999

| Does anyone have thoughts on BGA rework. We now use the OK BGA 3000 and now am considering an Infrared machine. Any thoughts? | I've used Pace, Conceptronic and, now, SRT machines. Bottom side IR is OK. Better thermal balance is achieved with hot air to ensure maximized heat distribution.

IR is a throwback to the good old days (10+ years ago) as it likes dark surfaces/objects and heats them readily. It "reflects" off shiney surfaces rendering heat transfer to a minimum. Simulating convection hot air reflow profiles is not possible during rework, but it is what we try to emulate to effect the highest quality.

Earl Moon

reply »

Glenn Robertson

#11115

Re: BGA Rework | 9 June, 1999

| | Does anyone have thoughts on BGA rework. We now use the OK BGA 3000 and now am considering an Infrared machine. Any thoughts? | | | I've used Pace, Conceptronic and, now, SRT machines. Bottom side IR is OK. Better thermal balance is achieved with hot air to ensure maximized heat distribution. | | IR is a throwback to the good old days (10+ years ago) as it likes dark surfaces/objects and heats them readily. It "reflects" off shiney surfaces rendering heat transfer to a minimum. Simulating convection hot air reflow profiles is not possible during rework, but it is what we try to emulate to effect the highest quality. | | Earl Moon | If you are looking at BGA rework equipment I would add Air-Vac to the above list. I have similar concerns with IR reflecting away from some surfaces and not others. Some companies say they can heat BGA solder joints with IR wavelengths that are not absorbed by the plastic mold compound. If anyone has experience with this I would like to hear about it. Regards.

Glenn Robertson glenn.robertson@usa.alcatel.com

reply »

vacuum tweezers - manual pcb assembly

PCB Soldering Tools