Printed Circuit Board Assembly & PCB Design Forum
SMT electronics assembly manufacturing forum.
Views: 8531
hi Dave.F and All, I need to reflow SCA solder balls on Sn/... - Oct 04, 2006 by CW
Change mfgrs of paste OR better yet use pbfree paste, If you... - Oct 04, 2006 by RDR
The main cause of voids is your flux out-gassing during refl... - Oct 04, 2006 by
My soak at 150C - 180C for approx. 85sec to 100sec. I belie... - Oct 04, 2006 by CW
Hmmm.. you are in a pickle then. I have AIM's "Reflow Pro... - Oct 04, 2006 by
what is your peak temp.. if you try to go too high say 225-... - Oct 04, 2006 by
My Peak ~ 228-230C (customer wants to see this temperature).... - Oct 04, 2006 by CW
you may want to try a different MFGR of paste, this does hel... - Oct 04, 2006 by RDR
Any recommendation? ... - Oct 04, 2006 by CW
try Alpha OM5100 this is a noclean paste that we use and hav... - Oct 04, 2006 by RDR
Thanks Russ!!! So, you have NO VIODS at all? ... - Oct 04, 2006 by CW
very minimal at very few locations. We do not Xray every bo... - Oct 04, 2006 by RDR
OK. Thanks!! Lastly, is it the nature of the chemistry ... - Oct 04, 2006 by CW
that question I think I will punt it on over to some of the ... - Oct 04, 2006 by RDR
I have noticed certain BGAs void more than others. We place... - Oct 05, 2006 by Real Chunks
Good morning all. We are able to offer some insight into ... - Oct 05, 2006 by Mario Scalzo - CSMTPE, Dartmouth 6 Sigma Brown Belt
I had horrible experiences with a certain brand on multiple ... - Oct 05, 2006 by
Thanks! What's your ramp rate?2 - 3C/sec? What's your ti... - Oct 05, 2006 by CW
Thanks All!! ... - Oct 05, 2006 by CW
Mario, what happens when there are components on the board... - Oct 06, 2006 by
CW, make sure your customer is aware of the affect high te... - Oct 06, 2006 by
Here's the BGA voids-reduction profile that I used: ... - Oct 06, 2006 by
Solid Solder Deposit may work www.sipad.com mk ... - Oct 13, 2006 by
We had a build that showed a relatively high occurence of BG... - Oct 17, 2006 by PWH
CW, The good news is that you are not trying to use SAC pas... - Oct 26, 2006 by
Thanks!!! ... - Oct 26, 2006 by CW