Electronics Forum | Mon Mar 19 08:26:37 EST 2001 | hany_khoga
Dear All: We have a problem of soldering big BGA's (3.5Cm * 3.5 Cm)during rework or repair. With three big companies stations (hot air & infrared) with their support, they faild to re-solder even one BGA succesfully. Note that we workes on a good te
Electronics Forum | Mon Aug 08 06:17:09 EDT 2005 | Hi Steven
My suggest is using Ersa IR55A or IR650A. http://www.ersa.de/en/ If you looking for your quality, you need this system. I had try it many time, is better then hot air. and you can set the profile as you like, even Flat Peak on the Lead Free Rework.
Electronics Forum | Thu Apr 01 12:05:21 EST 2004 | babe
Heat guns scare me, hot air scares me too. Just the heck of it why not apply high temp paste to the center and eutectic 63/37 standard solder to the outside pads. The outside reflows first allowing proper seating of the component and with a proper pr
Electronics Forum | Mon Mar 19 11:32:06 EST 2001 | Steve
Have you done any analysis on the failed rework? There could be any one of several reasons, i.e. bad alignment, wrong reflow profile, bad pad plating, etc. More information will help us help you.
Electronics Forum | Mon Mar 08 09:03:17 EST 2004 | russ
Is this problem really related to the size of the BGA OR the size/thickness of the PCB? Would I be correct in assuming that your pre-heater is small in size? Usually a board warps like this when the ramp is to great at the localized area. the imme
Electronics Forum | Thu Mar 18 16:39:14 EST 2004 | Jed Johnson
A few good points have been made here: The profile could be ramping too fast. The profile could be gettting too hot. The profile may need to have more "soak" time before reflow to allow the board temperatue to equalize and the board to "relax" and st
Electronics Forum | Mon May 27 12:14:35 EDT 2002 | arcandspark
I use the exact same paste flux that we use in our solder paste for SMT manufacturing with great success. I have also had great success using the Air Vac DRS Hot Gas units with the same size BGA's. If to much heat is applied to fast to the BGA be it
Electronics Forum | Thu Aug 16 04:54:44 EDT 2001 | mugen
METCAL has a good unit, for BGA rework, and it uses Hot Air Reflow (convection). The pros and cons of Hot Air Vs IR, you can find easily ard u... em are ageless topics, happy debating. hint : good reasons why SMT Reflow Ovens, were IR switched to
Electronics Forum | Thu Sep 23 13:17:06 EDT 1999 | Jeff Ferry
| | | Hiya, | | | | | | Could anyone please suggest recommended manufacturers of | | | IR rework stations for the removal of various SMT comps. | | | | | | Cheers | | | | | Why IR ? Ok, I�ve seen only one but that thing burnt the PCB before the s
Electronics Forum | Thu Sep 23 14:18:28 EDT 1999 | Jeff Ferry
| | | | | Hiya, | | | | | | | | | | Could anyone please suggest recommended manufacturers of | | | | | IR rework stations for the removal of various SMT comps. | | | | | | | | | | Cheers | | | | | | | | | Why IR ? Ok, I�ve seen only one but that
winsouce.jpg)
