Electronics Forum | Wed Oct 27 19:50:59 EDT 1999 | chris
Hi What is the possible cause of non-wetting of solder paste to the gold land pad. What we observed in the surface of the non-wet pad is an organic FM, and using FTIR we found out that it is a flux. It is possible that the cause of non-wetting is
Electronics Forum | Tue Sep 01 11:30:28 EDT 2009 | rgduval
Is the solder wetting to the pad, and not to the part? If so, and all other things being true (same process, profile, solder), we'd suspect some contamination on the part preventing solder from wetting to the part. This could be tested by attemptin
Electronics Forum | Wed Oct 19 22:48:18 EDT 2016 | thaneshsivanadian
Hi All, Currently im seeing a cold solder/ poor wetting underneath the BGA Ball as i shown in the attachment. From the attachment you also can see one ball with poor wetting and another ball with a good wetting. When i checked with my re-flow profil
Electronics Forum | Tue Aug 11 14:09:30 EDT 1998 | Bucky Allen
Looking for Suppliers of surface mount wetting balance equipment.
Electronics Forum | Tue Mar 10 22:27:14 EST 1998 | DWR
What does the term "poor wetting" mean as a defect code ?
Electronics Forum | Wed Mar 11 10:58:58 EST 1998 | Earl Moon
| | What does the term "poor wetting" mean as a defect code ? "Poor" should mean unacceptable when surface (component or PCB solder termination areas) wetting does not provide acceptable solder joints. Unacceptable wetting of PCB solder termination
Electronics Forum | Wed Jan 04 16:21:14 EST 2006 | jrlouden
What is the preferred method of under stencil wiping? (Wet or Dry wipe)
Electronics Forum | Thu Sep 07 08:44:17 EDT 2006 | vicknesh28
Did check the coplanarity of the failed lead and found it to be as good as the wetting leads.
Electronics Forum | Mon Jul 28 05:35:17 EDT 2008 | surendra268
What could be the main reasons for De-wetting in reflow process. Can anybody answer
Electronics Forum | Thu Oct 28 09:25:35 EDT 1999 | Dave F
Chris: Typical non-wetting causes are: * Poorly controlled soldering process * Incorrect material * Surface contamination * Insufficient preheat * Misapplied solder mask * Shadowing Without intending to insult you, all of the causes of non-w
