Electronics Forum | Tue Dec 13 15:00:31 EST 2011 | davef
Contaminating lead-free solder connections with lead is generally a bad idea, but that's not what you plan. You plan to add tin to your tin-lead solder connection. We don't think there is a significant problem for most applications. Adding tin will
Electronics Forum | Tue Jan 03 11:01:19 EST 2012 | julie331975
We are working with .065" thick metal core PCB's. I have a couple boards that are in need of rework. The components we are placing are similar to a SOJ package with a solder pad underneath the component. We are also using a lead free process. I have
Electronics Forum | Mon Feb 27 09:31:30 EST 2012 | pauld
Hi Dave, Picture a camera mounted on top of a fixed base that pans 360 deg. back and forth. The motor connects through a circular slip ring board with brush connection. The rings are hard gold and the typical brush material is soft. Unlike the armatu
Electronics Forum | Wed Jun 13 16:51:26 EDT 2012 | davef
Sorry, but I don't have a quick and easy answer. Before jumping the 'black pad shark,' tell us more about your boards ... * Is the gold still on the pads after soldering? * Can you make the pads take solder using a soldering iron? * Does this happen
Electronics Forum | Thu Jun 14 04:24:32 EDT 2012 | brettrenishaw
Yes pads are still gold after the wave soldering process even if you wave solder a pcb several times. I have tried soldering using an iron and the solder takes to the pad as you would expect. This happens on all boards of this type and all boards are
Electronics Forum | Thu Oct 25 13:33:18 EDT 2012 | cyber_wolf
Ken, The photo looks like results I have seen because the gold flash was too thick on the board. This causes a condition known as gold imbrittlement. You may want to get an analysis of the plating thickness. I'm not real experienced with immersion si
Electronics Forum | Mon Sep 24 10:07:46 EDT 2012 | eezday
The answer, as stated above, is 3 microinch's however, it is equaly important, if not more important, to understand that the only function of the gold is to protect the surfaces beneath it. Only enough gold to cover the nickel beneath it should be u
Electronics Forum | Mon Feb 04 22:29:55 EST 2013 | armandogomez
This is a very common question, I can relate to your question I have here almost the same setup on the smt line, printer a DEK, MY12 and an awful versatronics oven, about the question about the responsibilities, here the operator has only the knowled
Electronics Forum | Mon Mar 11 09:46:04 EDT 2013 | cyber_wolf
The surveyor is a a plate that I use to "survey" or verify the oven on a weekly basis. The data logger or profiler is the actual unit that follows the board through the oven to take readings. I don't think the zone thermo couple that measures temp a
Electronics Forum | Fri May 03 16:06:44 EDT 2013 | hegemon
To be short, no change in profile is going to get you through this. As I recall the point of hard gold is to retard the wetting process, so no surprise here. For example a connector might have hard gold plating at the mating surface, but not at t
