Electronics Forum | Wed Aug 04 17:44:43 EDT 2004 | davef
Left click on the blue underlined "davef" [just left of the Lou Reed head] on one of my postings. An email dialog screen should popup and you should be able to paste [or attach] your pix there.
Electronics Forum | Wed Aug 04 11:34:00 EDT 2004 | Rafal M.
Hello! My problem are solder balls in normal (with Pb) wave soldering proces. Balls appears between connector pads. I tried to change fluxes and preheating in machine (and combinations of both). What else can I do? I have no wide experience in solder
Electronics Forum | Thu Aug 05 05:00:34 EDT 2004 | Bryan
In my normal Pb process,we 've a station names "Remove the solder balls and clean the board",I think we'll also have such a station in our Pb-free process. Bryan
Electronics Forum | Thu Aug 05 13:33:22 EDT 2004 | davef
For the �The Chip Wave Dilemma", look here: http://www.alphametals.com/products/fluxes/PDF/dilemma1.pdf
Electronics Forum | Thu Aug 05 13:34:44 EDT 2004 | davef
If you like to absorb the cost of removing solder balls with SnPb, you will like it an even greater amount with Pb-free
Electronics Forum | Thu Aug 05 17:29:24 EDT 2004 | russ
what type of flux are you using and what type of solder resist is on the PCB solder resist (Gloss or Matte), also what is the orientation of the connector to the wave flow and what is the pitch of the leads? Russ
Electronics Forum | Wed Aug 04 16:49:24 EDT 2004 | jim_bob
Regarding Lead Free component finishes, vendors are zeroing in on matte tin plating as the finish of choice. What test are performed, to determine if a finish is "matte" type (vs. non-matte)?
Electronics Forum | Wed Aug 04 18:38:53 EDT 2004 | davef
whiskers / "matte" => no whiskers. Look here: http://nepp.nasa.gov/whisker/anecdote/20year/ There. Nice going. What a buzz killer. I've got to got find some donuts, cold pizza, er whatever.
Electronics Forum | Thu Aug 05 10:55:19 EDT 2004 | jim_bob
Thanks. Yes, this is a interesting topic, and one that keeps our component engineers busy these days. I'm familiar with the data you referenced. Is there a "easy" method (test method) to use at incoming inspection to verify a termination is "matte
Electronics Forum | Thu Aug 05 14:45:03 EDT 2004 | davef
Bright vs matte tin is fairly easy, but there's a s whole bunch of alternatives, beyond those two choices. So, no, not that we know.
