Electronics Forum | Fri Oct 24 06:55:48 EDT 2008 | clampron
Good Morning WS, If you experieced the solder balls after reflow of a bare board through the oven, then the source of the solder is either the oven or the board. I have had boards with untented via's that were HASL'd that had entrapped solder and fl
Electronics Forum | Mon Oct 27 14:15:47 EDT 2008 | hussman
So you passed a BARE board thru the oven and got solder balls?
Electronics Forum | Thu Oct 23 23:38:48 EDT 2008 | pathakvj
We have 8 layer HASL PCB. We saw molten solder blobs / balls on op side of assembled PCB. (to check, if this was a bare board problem), We passed bare board as received thru, SMT reflow oven and saw solder balls on top side of board. What could be th
Electronics Forum | Thu Oct 30 19:59:05 EDT 2008 | gregoryyork
solder ball was caused by hasl process not reflow. seen before many times, look around wells of smt on bare boards should be more of them
Electronics Forum | Mon Oct 27 14:28:19 EDT 2008 | patrickbruneel
Do you refer to the highlight in the picture as a solderball? Looks more like copper to me.
Electronics Forum | Tue Nov 04 12:58:17 EST 2008 | smt123
I have to agree with Patrick here. This image appears to show a board that is NOT HASL as there is what appears to be a copper pad in the upper portion of the image. But then again the arrow tip appears to be white and I woudl expect that to be red s
Electronics Forum | Thu Jun 07 05:11:42 EDT 2012 | cp38260
Hi, I have pcbs (Duroid/RT 5880) with raw copper, soldered in vapour-phase chamber at 230 degrees Celsius. During soldering, copper gets tarnished. Cleaning with Vigon A250 removes the tarnished layer. Indeed, in the VigonA250 techn. datasheet it is
Electronics Forum | Fri Dec 23 06:09:04 EST 2005 | Slaine
good report showing lots of sections and compairng differnet pcb finishes http://www.smartgroup.org/experience/experience%20report%202005.pdf
Electronics Forum | Fri Dec 23 23:29:17 EST 2005 | azbvc
Slaine, thank you for sharing..
Electronics Forum | Sat Dec 24 08:26:41 EST 2005 | GS
Thank you, very intersting. Seen they've experimented also Sn Cu Ni on wave solder. Rgards............GS
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