Hi All,
We just were running some boards (ENIG finished) where we're seeing this
sporadic non-wetting on some of the pads:
http://stevezeva.homestead.com/PKG2.jpghttp://stevezeva.homestead.com/PKG3.jpghttp://stevezeva.homestead.com/PKG4.jpg
Usually it's just a few pads and the rest of the board is fine. We get
the boards in packs of 20, and it's only a couple or so out of the pack
that exhibit the problem. It's just enough to be irritating.
When we touch the locations up with a soldering iron they wet fine.
We're using a 63/37 water soluble paste, and the problem doesn't confine
itself to just certain pads or parts, it's random.
Like I said it's just enough to be irritating..... /:o[
Steve Gregory
______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________