Electronics Forum | Fri Dec 03 19:44:34 EST 1999 | Russ
Hello all, I am in the process of converting our facility to noclean processes. So far I am experiencing troubles with soldering to gold finishes. The finish is an H.P. type1. The solder joints appear dull and grainy. They seem to be very strong
Electronics Forum | Wed Sep 30 04:36:54 EDT 1998 | Jacqueline Coia
Still cant get a fix to SMD soldering problems, Joints still look strong shiny and well wetted, although when pulled lead still coming away from pad, leaving a dull grainy looking space. This is occuring just after reflow (convection), no other proc
Electronics Forum | Tue Nov 14 01:24:07 EST 2006 | CHITRA
In some of SMT PCBs, we get black coloured dull finish /soldering joints on leads for QFP. What is the reason for getting this black colour finish . If we use the same IC on some other board for the same pitch location ,we get good soldering result.
Electronics Forum | Fri Oct 15 11:32:04 EDT 2010 | patrickbruneel
Inspecting for plating problems shouldn’t be part of incoming inspection. Your board manufacturer should have the appropriate process control. I shouldn’t have said barrel cracks but plating skips. Plating skips are caused by dull drills or a too hi
Electronics Forum | Wed Jan 13 13:00:14 EST 2016 | anvil1021
We are experiencing a few issues every now and then with acceptable reflow results? We have changed solder paste, thus reflow profile types and even reflow ovens but we still seem to get some not so good reflow on certain pcbs. We can even take PCBs
Electronics Forum | Mon Dec 06 05:18:53 EST 1999 | Wolfgang Busko
Hi Russ, assuming that only your flux changed and the PCB-finish stayed the same it seems to me that the solderability of that finish is somehow poor. About Ni/Au it can be said that the solderconnection is made between Ni and Sn. The Au-finish is ju
Electronics Forum | Tue Mar 15 07:59:07 EST 2005 | mattkehoe
We are looking for some feedback on this situation. Please let us know if you have any ideas. Thanks in advance. I have been doing some studies on defects and such with our PCB's in prep for lead free and I've come to a conclusion about our process.
Electronics Forum | Mon Feb 23 10:39:37 EST 1998 | Igmar
| I have been involved in SMT for only a few months so I am coming from a position of extreame ignorance. I have been asked to investigate the differences in soldering to components with Paladium coated leads vs the standard Tin_lead. I would appre
Electronics Forum | Sun Apr 04 14:59:38 EDT 2004 | davef
When you say, "you can see the plating of each lead embedded in the broken solder joint", we do not get the sense of a well soldered connection. * We don't expect to see [or make the distinction] of the plating from the connector in the solder. We
Electronics Forum | Mon Jan 19 14:54:38 EST 2004 | cyber_wolf
How did you come to the conclusion that you are having a cold joint problem. Just by appearance ? As Dave stated if you have any of the metals that he listed in the joints they will appear to be dull and grainy sometimes. But... Dave, I will have t
