Electronics Forum | Fri Apr 16 12:17:51 EDT 2010 | richardli
We have asked the supplier use whiter soldermask taking more heat. We also asked the board supplier to double coat board with soldermask. All these tries failed. We are wondering if the stains are flux contamination.
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 | 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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