Electronics Forum | Tue Feb 11 12:02:52 EST 2014 | javierec
Process: Batch Cleaner, @16% concentration. Concentration is checked daily. Cleaning after Wave Process. See attached pictures and comment and what you think causes the solder joint to turn grey. i have read post that say the grey dull looking sol
Electronics Forum | Wed Mar 12 09:33:55 EDT 2014 | neiderman
The grey solder joint appearance in the picture looks to be due to chemistry etching the joints. This can be a common problem with alkaline chemistries running at high concentrations and or alkaline chemistries running in batch machines that require
Electronics Forum | Wed Oct 12 11:08:12 EDT 2005 | Mike
Hly, The solder ball in your picture looks just like the countless BGA solder joints that I�ve produced over the past 8+ years. We've had a good number of these joints X-rayed, cross-sectioned, and thermally stressed. Some say that the stretched loo
Electronics Forum | Thu Feb 02 08:54:43 EST 2017 | emeto
Hello all, I was just wondering if solder pot temperature affects the quality or the life of the solder joints? For example we run 100Sn at 275C. If I bump it up to 300C, what is that going to change?
Electronics Forum | Tue Mar 21 12:52:56 EDT 2017 | emeto
No clean is giving us problem in ICT. Other than that, a coating of flux should remain there to pretect the solder joint from the environment. In general you should not clean NO clean - it is supposed to be there.
Electronics Forum | Wed Oct 12 13:49:17 EDT 2005 | russ
Most likely happening during the cooling phase. I also produce many of these joints with no reliability, DOA, or field failures to date (thousands upon thousands). Contact your paste supplier and they will give you the technical stuff on what you a
Electronics Forum | Thu Oct 27 00:45:41 EDT 2005 | pavel_murtishev
Good morning, I can recommend to use solder paste softeners, which can prepare solder paste for printing process. Softeners rise paste temperature by means of pseudo-planetary motion. Therefore, solder paste reaches room temperature during only 15
Electronics Forum | Wed Sep 10 14:56:57 EDT 2008 | rarnold
I am dealing with a similar uncoalesced solder issue. This defect has come and gone several times during the last 6 months. See image. In my case, I am using conventional SnPb solder and an entire strip of my OSP finished board (includes various de
Electronics Forum | Thu Jun 08 17:39:28 EDT 2017 | zsoden
SuMoTe, that is a fair suggestion, but I believe will be a non-starter. The solder pump motors are actually 40V motors being run from a PWM 24V supply. I did one time try hooking up to a separate power supply up to 40V but all this seemed to do was m
Electronics Forum | Thu Sep 11 14:47:40 EDT 2008 | rarnold
For Production purposes, the problem goes away when a new solder paste lot is used. As I reported in my first message though, the problem keeps coming back. Most likely, paste lot is not the Root Cause (3 different lots now in the last 6mo). I rea
