Electronics Forum | Tue Jul 30 17:47:50 EDT 2002 | davef
Dewetting: Solder does not adhere to lead or land, caused by: * Poor solderability of lands. * Poor solderability of leads. * Solder paste integrity. * Lead plating integrity. Need more information, please: * What is dewetting [ie, component, pad, e
Electronics Forum | Wed Apr 02 09:25:32 EST 2003 | davef
RDR The most common cause of dewetting is from a fabricator using any form of abrasive (e.g. pumice, abrasive brushes etc.) on copper. With this process, abrasive particles get implanted into the copper (often actually swaging copper over some of th
Electronics Forum | Mon Jul 19 16:26:09 EDT 2004 | davef
Your fab has supplied you with unsolderable boards. They are dewetted, due to some process problem. That they are dewetted on the annular ring of the via indicates that the problem is with the board and not with your paste. [We assume you do not p
Electronics Forum | Mon Feb 13 13:43:54 EST 2006 | pjc
You will begin to de-wet at a high TAL and actually likely see all of the conditions you list.
Electronics Forum | Thu Nov 02 12:18:31 EST 2006 | pbarton
What surface finish is your PCB?
Electronics Forum | Mon Apr 28 11:27:14 EDT 2008 | vortex337
Thanks, I will give it a try this afternoon.
Electronics Forum | Mon Jul 28 11:22:46 EDT 2008 | blnorman
Iagree with Matt, normally caused by pad surface contamination. Out of curiosity, what is the PCB metallization?
Electronics Forum | Fri Dec 10 04:55:42 EST 2010 | tselvan
what is the rootcause for conformal coating dewetting & peeloff
Electronics Forum | Thu Jan 22 03:25:26 EST 2009 | stevewilde
What masking tape can people recommend for masking the board when conformal coating. I am using a PVA autocoat machine and humiseal 1B31. Current tape, is leaving residue on board when used to hold link wires down whilst glue cures and also when used
Electronics Forum | Tue Jul 06 08:28:16 EDT 2010 | Sean
Hi all, Recently, we found the IC lead dewetting as shown in the attached file..This problem only happen on particular lead only...We checked our reflow profile and its look everything is fine..We did cross section and EDX..I think this could be mat
