Electronics Forum | Wed Oct 04 13:58:38 EDT 2006 | cw
hi Dave.F and All, I need to reflow SCA solder balls on Sn/Pb paste, i get a pretty OK solder wetting and collapse apperance, however, i am seeing voids everywhere, some of them is greater than 25-30%, which has exceeded IPC standard. Please advise.
Electronics Forum | Wed Oct 04 16:21:59 EDT 2006 | cw
Any recommendation?
Electronics Forum | Wed Oct 04 16:45:04 EDT 2006 | cw
Thanks Russ!!! So, you have NO VIODS at all?
Electronics Forum | Thu Oct 05 16:13:35 EDT 2006 | cw
Thanks All!!
Electronics Forum | Thu Oct 26 12:25:46 EDT 2006 | cw
Thanks!!!
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 16:54:24 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 | Fri Oct 13 06:44:18 EDT 2006 | Matt Kehoe
Solid Solder Deposit may work www.sipad.com mk
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
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