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.
Electronics Forum | Fri Oct 20 10:15:13 EDT 2006 | wrongway
mid chip solder balls we had that trouble for awhile we went from a 8 mil thick stencil to 6 mil stencil and did some home plate style of cut outs in the stencil for the 1206 caps and resistors it seemed to fix our mid chip solder balls
Electronics Forum | Mon Jan 15 10:28:49 EST 2007 | Earl Jr.
We use to use a malcom mixer but found it caused problems of solder/flux separation. This may be causing you problems. Earl Jr
Electronics Forum | Thu Sep 11 10:45:41 EDT 2008 | diesel_1t
Is just me, or too many "soldering issues" have been observed lately? on this forum... could be a ~90% components "backwards/compatible" in both leaded/lead free process?
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