Electronics Forum | Tue Jun 04 12:54:00 EDT 2002 | Bob
Hi, We are manufacturing a small PCB with large areas of gold plating. We experience from time to time what appear to be solder splashes on the gold areas. I do not believe the contamination to be from "outgassing" due to the distance from the dep
Electronics Forum | Wed Jun 05 15:09:44 EDT 2002 | cyber_wolf
I have seen this happen before it has been my experience that even one tiny sphere of solder form your solder paste will melt and spread out on your gold fingers. The particles are so small that they are not visible to the naked eye. If operators ha
Electronics Forum | Thu Jun 06 07:28:30 EDT 2002 | cyber_wolf
It has been my experience that the only thing(s) that will ever cause this is: 1. Operators with paste on their hands. 2. Paste on the screen printer tooling. 3. Paste on the bottom of the stencil. Even very very small amounts of paste on the gold fi
Electronics Forum | Thu Jun 06 11:42:24 EDT 2002 | Brad Jakeway
What you are seeing on your gold fingers is referred to as flux spattering. This is a very commond problem with gold fingers if you have a zero flux spattering criteria for quality control. The key to eliminating this problem is in the reflow profi
Electronics Forum | Wed Jun 05 13:21:11 EDT 2002 | Hussman69
That's OK, as long as you didn't say breading, I knew what you meant. Well, for a quick fix try placing Kapton tape over the gold. It's not a cure, but gets you product. Next try putting a couple of non-screen printed boards thru the oven and se
