Electronics Forum | Fri Mar 02 08:52:20 EST 2001 | markkrmp
Are your voids looking like blow holes also? Is this only occurring on the solder joints of the Thru Hole components and Via's? Or does this happen on SMD pads? My experience is that we have seen this but only with some of our older PCB's which are
Electronics Forum | Fri Apr 06 11:37:19 EDT 2001 | raton
We had the same problem years ago when we started using a radial inserter. The inserter would dutyfully insert and clinch the leads. The problem in our case was the component body sealing to the fab, especially on electrolytics caps with a film jac
Electronics Forum | Mon Aug 28 12:44:23 EDT 2006 | actech
WE have been running a leaded product for a few years and while the product is exempt from PB free regulations the components have been comming in lead free reciently and this caused little or no change in the process and or product, However! the Boa
Electronics Forum | Fri Sep 22 09:45:26 EDT 2006 | bradlanger
Greg, All the above. It looked like it was going to be a drop for SNPB HASL at first but after a few thousand boards we started running into all the problems you are describing. We first started seeing non wetting on SMT pads. The solder would wet t
Electronics Forum | Fri Sep 19 11:39:38 EDT 2003 | joeherz
We have recently started building a new assembly that is exhibiting some strange behavior. We are seeing what look like blow holes in wave soldered joints. When the joints are touched up, the solder in the barrel will actually bubble up from the ho
Electronics Forum | Wed Sep 09 09:38:53 EDT 2009 | patrickbruneel
Dave is correct (as usual). Baking the boards might reduce blowholes but will definitely not eliminate the problem. Back in my hay days we had a huge problem with blowholes and we baked boards 24/7 with very little success in reducing blowholes (ev
Electronics Forum | Mon Sep 03 09:48:12 EDT 2007 | davef
Joris We don�t know the maximum period to store the boards without having problems with blowholes. Too many variables to determine. We prefer to just fix the problem, but understand that you have stock that you need to build-down. Determining mois
Electronics Forum | Mon Nov 19 09:34:50 EST 2007 | bbarton
Real Chunks...Yes, that's the most glaringly obvious defect in the short term (you'll probably find it on your production floor if it's really bad) but you may find that everything looks good short term only to have a high level of customer returns..
Electronics Forum | Thu Jun 28 17:05:46 EDT 2012 | davef
Here’s what we seem to know: * There’s a problem with voiding in the solder connections of SMT capacitors * A void is an open area caused by air or process fluid that is trapped within a solder connection * Voids are an allowable condition as long as
Electronics Forum | Mon May 14 14:34:05 EDT 2007 | rgduval
I have to agree with Jax. We've had some successes, and some horrible failures using white-tin. Generally in solderability, and apparently related to the somewhat more rapid deterioration of white-tin finishes. We've run white-tin as an SMT only
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