Electronics Forum | Sun Feb 12 22:52:20 EST 2017 | ltchsze
Hi fellow professionals, Wondering whether anyone has experience with solder splashing from component terminal. Have identified the source using the component without printing solder paste on PCB. Wondering the root-cause of the solder splashing fr
Electronics Forum | Mon Feb 13 10:41:14 EST 2017 | dyoungquist
Could be that your temperature ramp up rate is too fast. This could cause the flux in the solder paste to burn off too rapidly. When that happens, it can expand as it heats up and burns off, causing the solder to get spread out from the pad.
Electronics Forum | Tue Feb 21 16:39:03 EST 2017 | ltchsze
Thanks for input, dyoungquist. The condition here is without any flux or paste applied. Solder from component terminal started splashing by itself when put through re-flow.
Electronics Forum | Wed Mar 22 14:59:20 EDT 2017 | solderingpro
Hello Henry, I believe some further clarification may be needed for someone to assist. Is the component already soldered prior to reflow? Does the component have paste already applied going through reflow? (or as per my previous question, is it al
Electronics Forum | Mon Mar 17 07:00:34 EDT 2008 | ectan5117
Hi, During SMT process, i found that solder splash on the gold pad. The distance between the COB pad with component pad is about 1.25mm. My question is what material can used to cover the COB pad without bringing contamination. And i am welcome to
Electronics Forum | Tue Jun 03 13:01:16 EDT 2003 | Ramanandkini
We have some experience in manual application of conformal coating using a brush that too for small circuits espceially on the soldered pads. We use Chase corporation's Humuseal 2A64. This passes high humidity tests. I am also in touch with Lackwere
Electronics Forum | Tue Dec 06 06:14:38 EST 2005 | bwet
Try using some of those new polyimide stencils. They are 8mils thick and can prevent shorting if it is due to solder mask problems or too much paste. http://www.solder.net/technical/tips.asp BWET
Electronics Forum | Mon Nov 21 09:23:06 EST 2005 | Amol
With a BGA, how much solder paste are you putting on the pads? sometimes, bridging occurs when there is more solder paste than needed during reflow.....just a thought
Electronics Forum | Thu Mar 20 08:45:02 EDT 2008 | davef
Common methods use to protect pads from solder splatter are: * No residue Kapton tape * Nonionic solder mask
Electronics Forum | Fri Nov 25 09:31:56 EST 2005 | davef
pyramus, First, search the fine SMTnet Archives for previous discussions on BGA shorts. Second, we're still not clear on the issue. * Is the problem with a BGA? If so, please describe the BGA, including any heat spreader * Is the problem with a uB
