Electronics Forum | Fri Nov 17 11:03:32 EST 2017 | davef
IPC-A-610F, 10.1, Non-Soldered Contact Areas: Has words to the effect that for Class 1, 2, 3; it is defect to have solder or any other contamination in the critical contact area.
Electronics Forum | Thu Aug 19 08:22:05 EDT 2004 | Rafal M.
Hello. I have a problem with reflow soldering of PCBs with golden pads. Peste explodes in the oven. I don't know in witch phase of process (in what point of profile) it happens. It's the reason of problems with golden pads - it's dirty when going out
Electronics Forum | Fri Feb 26 23:54:48 EST 2016 | padawanlinuxero
Hello guys Guys I am looking for a IPC 4552 can someone help me with a digital copy, we are a small company and having lots of problems with a ENIG board that goes thru the solder wave and sometimes the golden pads, well they dont look golden more l
Electronics Forum | Sun May 27 19:51:00 EDT 2012 | darby
Seeing as you say you only have a small amount of cash ... I'd also consider a semi-auto printer where you align a golden board, set up the two cameras by boxing or overlaying a pad etc, and then use the vernier adjustment to get each pcb to align wi
Electronics Forum | Thu May 05 02:40:30 EDT 2016 | padawanlinuxero
Hello guys! I have a question for you guys, we have been working with a cleaning agent call Safewash (SWAS) from electrolube, we use this safewash to clean the flux residue from the boards after wave soldering, since or customer doesn't like to have
Electronics Forum | Wed Sep 20 19:30:15 EDT 2000 | Dave F
Consider searching the SMTnet archives. There's 30+ postings for black and pads. Good luck.
Electronics Forum | Tue Apr 06 17:01:24 EDT 2004 | davef
It doesn't make sense that contamination would form on your gold pads after prebake of 150C for 3 hrs. The contamination must have been there prior to the bake. Your description makes us think of solder mask bleed. Tell us about: * Solder mask * S
Electronics Forum | Fri Oct 23 17:40:19 EDT 2009 | gregoryyork
So if you have Carbon showing on this would this not mean it is something Organic contaminating the pad.I have seen this before with solder resist depositing over the pad.
Electronics Forum | Mon Sep 25 15:32:21 EDT 2023 | joeljacobo
hello colleagues, Hoping that everyone is doing well, I am reaching out to you in the hope that your experience can help me. We have a wave solder with sac0307 alloy and the pot has turned a golden color, at first I thought it was common tin oxidat
Electronics Forum | Wed Oct 09 12:29:14 EDT 2002 | ppcbs
We have been encountering black pad contamination on gold plated boards mainly affecting BGA components during assembly. This problem has been noticed with many of our customers that are using an array of fab vendors. Does anyone have a solution fo
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