Electronics Forum | Mon Apr 17 16:17:47 EDT 2000 | Dennis Fall
Typically, Sn/Pb solders are used to preserve solderability on leaded and leadless SMT components. Are other finishes (such as those used in PCB manufacturing e.g. Sn, NiAu, OSP's, etc.) frowned upon by PCB stuffers and their customers? I am intere
Electronics Forum | Fri Oct 11 09:28:14 EDT 2002 | davef
Designers love to do BIG copper pours for several reasons: * Maximize heat spreading. * Increase EMI shielding. * Laziness. The poor folk that solder the parts on boards HATE big copper planes near solder pads. During soldering, fat copper traces [
Electronics Forum | Wed Apr 16 08:24:07 EDT 2008 | davef
Have you: * Checked the solderability of the component through a test such as Dip & Look? * Checked the solderability of the board by pasting and reflowing a bare board? * Checked the quality of the solder paste print prior to component placement? *
Electronics Forum | Mon Nov 14 09:57:37 EST 2005 | davef
If the solder that you apply bonds well to the metal terminations of the transformers, your customers should have no solderability problems related to your components.
Electronics Forum | Sun Mar 03 22:15:13 EST 2002 | caldon
RPS (Robtic Process Systems - I think) Makes a system called a Wet Balance tester. This machine is useful for Solderability on PCB sections and Components. Also for more info please go to http://www.empf.org/html/empfset.htm and down load Decemeber
Electronics Forum | Tue Apr 15 06:10:54 EDT 2008 | aj
Try a new batch of Components ? We had a similar problem a while back - it was down to the component. aj...
Electronics Forum | Wed Nov 06 10:31:30 EST 2002 | davef
First, from what you say, it's unclear that there is a "solderability" issue with your connectors. Different appearance of the soldered connection from one side of the connector to the other is what we're talking about [I think]. But it is curious.
Electronics Forum | Tue Apr 15 03:16:14 EDT 2008 | janz
Hello, We are having a problem with soldering QFP100 (16mmx16mmx1mm). Board dimensions: 70mmx50mmx1.8. FR4 two layers � single SMT assembly. Finish: HASL-lead free Oven: 7 zones �hot air Paste: lead free We have noticed that two groups of legs
Electronics Forum | Tue Nov 05 18:17:00 EST 2002 | russ
This sounds like a contamination issue with the HASL finish.(solder on lead but not on pad). I have experienced this before and it was related to the HASL process at our supplier. They found some type of contaminate in the bath (unfortunately I can
Electronics Forum | Thu Jun 19 07:35:54 EDT 2008 | davef
Try: ANSI/J-STD-002, Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires
