Electronics Forum | Fri Sep 12 16:56:13 EDT 2008 | ppcbs
We have a double sided board with Immersion Silver Plating. After reflow the Silver turns a yellowish color. It still wets good, and the yellow color will polish off with a pencil eraser. Has anyone seen this, or know the cause?
Electronics Forum | Wed Sep 16 00:03:55 EDT 2009 | linseeg
We encoutered few PCB after IR reflow the PCB pad change color from silver to yellowish / brownish. Our IR reflow peak temp is ~250 degree. The brownish cannot be remove with IPA as well. What is the main reason causing this issue?
Electronics Forum | Wed Apr 01 11:41:34 EDT 2020 | emeto
Very interesting.Safety datasheet suggest acid that might turn yellowish. I am interested is it cleaned easily with water?
Electronics Forum | Sat Aug 20 15:22:26 EDT 2005 | Jaya
Hi There, Good Day 2 Every1.:) I'm in mid of issue of SMT Components (Resistor & Capacitor) Turn Yellowish issue after reflow oven. Is there anyone have handle this issue previoslly and what is the reason behind the components behaviour in such. Can
Electronics Forum | Mon Sep 05 01:38:12 EDT 2005 | plcc
I hv a PCB (mtrl is RF35). After going thru' reflow, we found yellowish stain on the solder pad (solder mask). It looks like burn-marks. The reflow temp use is 245oC. We tried running bare pcb under 220oC, there's minimum stain found (acceptable),how
Electronics Forum | Mon Aug 08 05:20:37 EDT 2005 | jim
Ted, Is your pcb problems after reflow process related to the change of color of the pcb to yellowish? I have such problem when running thru' the pcb under ROsH condition. This pcb does not change color previously when running under non-ROsH condit
Electronics Forum | Mon Aug 22 08:12:18 EDT 2005 | Rob
We've also seen it where a component has had a long soak at a high temp (last one was 220C for 1.5 minutes)without exceeding PBT. The long soak was due to the oven only having 3 heated zones. On the last occasion there was some concern over the lea