Electronics Forum | Tue Dec 02 08:51:31 EST 2003 | Daniel Werkhoven
Dear Frank, could it be that your component legs are coated with a leadfree finish? This can have an inpact on soldering when your temp.peak in only 220�C and the melting point of pure Tin is 237�C. Best regards, Daniel
Electronics Forum | Wed Jul 28 00:12:48 EDT 2004 | NTV
It would be uncontrolled reflow process. Solder paste smeared, outdate solder paste, contamination, and many else could lead to this issue. A longer time reflow window would help elimating it (make it max. of 60 seconds liquid time).
Electronics Forum | Wed Jul 28 00:12:52 EDT 2004 | NTV
It would be uncontrolled reflow process. Solder paste smeared, outdate solder paste, contamination, and many else could lead to this issue. A longer time reflow window would help elimating it (make it max. of 60 seconds liquid time).
Electronics Forum | Wed Jul 28 00:12:58 EDT 2004 | NTV
It would be uncontrolled reflow process. Solder paste smeared, outdate solder paste, contamination, and many else could lead to this issue. A longer time reflow window would help elimating it (make it max. of 60 seconds liquid time).
Electronics Forum | Wed Jul 28 00:13:21 EDT 2004 | NTV
It would be uncontrolled reflow process. Solder paste smeared, outdate solder paste, contamination, and many else could lead to this issue. A longer time reflow window would help elimating it (make it max. of 60 seconds liquid time).
Electronics Forum | Wed Jul 28 00:13:23 EDT 2004 | NTV
It would be uncontrolled reflow process. Solder paste smeared, outdate solder paste, contamination, and many else could lead to this issue. A longer time reflow window would help elimating it (make it max. of 60 seconds liquid time).
Electronics Forum | Wed Dec 15 10:37:55 EST 2004 | gopinath A
Thanks Dave, That answers my question. I didn't think either that the qty of gold in platings would be enough to contaminate the solder pot. I wanted to make sure that leach test is a valid test for gold finishes. Gopinath@mcl.com
Electronics Forum | Mon Apr 04 09:26:25 EDT 2005 | russ
Depends on a lot of things as suggested above but we solder land to land spacings of .02" (.5mm) with no shorting. Russ
Electronics Forum | Thu Jul 07 05:12:08 EDT 2005 | bbudianu
Hi. I'm new in bussines. I have a DEK screen printer and I have to choise solder paste and flux. It has to be lead-free. What do you recomand? Of course it has to be cheap and good. :)
Electronics Forum | Thu Mar 02 16:33:53 EST 2006 | russ
Your best bet would be to browse through you current solder suppliers catalog and pick your alloy. Most of them have a list of alloys and their melting points as well as what form they can be supplied in.
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