Electronics Forum | Wed Oct 04 18:21:04 EDT 2006 | stepheniii
We have a board we run screwed to a fixture. There is no warping that way. If you go for reheating the BGA's make sure there is no time for the BGA's to absorb moisture.
Electronics Forum | Wed Oct 04 16:18:06 EDT 2006 | cw
My Peak ~ 228-230C (customer wants to see this temperature). solder ball size - 20mil diameter Please advise ASAP. Thanks a lot!!!
Electronics Forum | Wed Oct 04 16:19:54 EDT 2006 | russ
you may want to try a different MFGR of paste, this does help on many occasions. Russ
Electronics Forum | Wed Oct 04 16:47:25 EDT 2006 | russ
very minimal at very few locations. We do not Xray every board but sample them. I think you will find pretty good results here (not perfect) Russ
Electronics Forum | Wed Oct 04 16:54:24 EDT 2006 | cw
OK. Thanks!! Lastly, is it the nature of the chemistry that Sn/Pb solder mixed with Pb-free alloy will be getting voids? If so, what's the physic/chemistry behind it?
Electronics Forum | Thu Oct 05 07:58:05 EDT 2006 | realchunks
I have noticed certain BGAs void more than others. We place about 8 different brands of BGAs and only one brand voids like crazy and we have to adjust for it.
Electronics Forum | Thu Oct 05 16:06:33 EDT 2006 | cw
Thanks! What's your ramp rate?2 - 3C/sec? What's your time above 217C. What's your peak temp?
Electronics Forum | Fri Oct 06 08:24:01 EDT 2006 | inds
CW, make sure your customer is aware of the affect high temp might have on adjacent components on the board. I guess you must have already checked out the rated temperature of all the components on the board
Electronics Forum | Fri Oct 13 06:44:18 EDT 2006 | Matt Kehoe
Solid Solder Deposit may work www.sipad.com mk
Electronics Forum | Wed Oct 04 14:15:04 EDT 2006 | cmnguyen
We need help to find Quad QSA-30. We try scpssa and scp but both do not work. Please let us know if you know the password for this system.