Printed Circuit Board Assembly & PCB Design Forum
SMT electronics assembly manufacturing forum.
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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