Electronics Forum: stain on white soldermask (16)

Stain on PCB from reflow oven

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

Stain on PCB from reflow oven

Electronics Forum | Fri Apr 16 14:01:48 EDT 2010 | richardli

It could be the flux condensed in the oven. We plan to clean the vent and filter next week. Then we see if help. I just want to see if anybody has same problem in experience. Soldermask supplier told us the same white soldermask always change to a l

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