Electronics Forum | Tue Aug 22 13:55:44 EDT 2006 | Steve
Using no-clean flux going thru wave when comes out there is a bit of flux residue left on board. If wiped the residue shows a yellowish tint. Any ideas what this means how to get rid of it?
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
Electronics Forum | Thu Apr 15 14:09:48 EDT 2010 | richardli
We found stains on the boards come out of reflow oven. The board itself color changed to yellowish from white . We understand discolor soldermask due to high temperature. This can be acceptable by our customer not the stains. The stains look like wa
Electronics Forum | Tue Jan 08 08:52:30 EST 2019 | ameenullakhan
Hi Steve, We did the below trials today. 1. Run the board in O2 environment. result : Yellowish appearance was observed. After DI water Cleaning : Still the yellow color is there. 2. Same board run secondary side. Result : First side board yel
