Electronics Forum | Thu Sep 20 17:24:29 EDT 2001 | steveb
Have you seen any solder beading (balling) with the aperture sizes you have been using on 0201 components? Have you experimented with some of the solder bead reducing designs?
Electronics Forum | Fri Sep 21 14:03:45 EDT 2001 | jschake
I have observed solder balling for all aperture sizes tested. Solder balling levels appear to be better correlated against the amount of solder paste that is underneath the 0201 component terminations after placement rather than comparing this to th
Electronics Forum | Tue Apr 05 10:39:20 EDT 2011 | tkirk
Thanks! That definitely seemed to help. TK
Electronics Forum | Fri Apr 01 02:56:18 EDT 2011 | grahamcooper22
the cause could be moisture in your pcbs. To check it...pass some bare pcbs through your reflow oven (this is a simple way of drying them out a bit), then paste and place and reflow as normal....if solder beads disappear then the pcbs have too much m
Electronics Forum | Tue Apr 05 11:59:41 EDT 2011 | grahamcooper22
maybe the pcbs need a proper dry (the quick dry in the reflow oven won't get all the moisture out )...maybe 125 C for 4 hours or speak to the manufacturer to get their recommendations.
Electronics Forum | Fri Apr 08 20:37:09 EDT 2011 | tkirk
Just wanted to say thank you to everyone for your help. We will do a long bake for all future PCBs ordered from this vendor. TK
Electronics Forum | Thu Mar 31 20:16:31 EDT 2011 | tkirk
We recently decided to try using a different source for our bare boards to save money. On two different batches of PCBs now from the new source, we are seeing beading including some serious enough to short out underneath 0805 parts. We have never re
Electronics Forum | Wed Apr 06 04:18:03 EDT 2011 | emmanueldavid
TK, Hope you got it right only for this round of assemblies. Well, passing through a Reflow belt is not an ultimate process to dry circuit cards & take out moisture from Solder finished layers. First of all, if the packs were not unsealed (even s
Electronics Forum | Wed Aug 15 01:46:43 EDT 2001 | Pavel
Hi, could any body tell me the reason for solder beads apperance and how to aliminate them (solder beads are solder balls that are found along chip body). Thanks,
Electronics Forum | Wed Aug 04 15:05:17 EDT 1999 | Tom B.
Hello Netters, Can anyone provide me with info or where to get info on acceptability of solder beads and solder balls? Thanks for any help Tom B.
