Electronics Forum | Thu Nov 13 07:57:36 EST 2008 | alien
What type of solder wick do you use for cleaning up QFP pads after desoldering ? Many brands only wick well at the end, but not when laid flat over the pads. Swisstone brand (made in US) works best for me, but the suppliers seems to play hard to ge
Electronics Forum | Sun Nov 16 09:02:47 EST 2008 | davef
While we're unfamiliar with Swisstone, we accept: * Techspray Solder-Wik * Chemtronics Soder-Wick * NTE Solder Wick All of these [and Swisstone] look basically the same. We wonder if maybe they're all made by the same source and branded differently
Electronics Forum | Mon Oct 22 10:51:48 EDT 2007 | davef
You say, "we have encountered solder wicking on components ..." We expect to see wicking on solder connections. Maybe we're just using different terminology. Please describe the problem that you're seeing.
Electronics Forum | Tue Oct 23 03:57:39 EDT 2007 | jkhiew
Thanks Dave. But I do not understand why the solder being wicking away by the component itself. Does Ag/Pd finishes has stronger wettability than LF HASL finishes ? Rgds
Electronics Forum | Mon Oct 22 05:04:08 EDT 2007 | jkhiew
Hi, Recently we have encountered solder wicking on components termination (total of 13 pcs of components on one pcb)with Ag/Pd finishes during lead-free reflow soldering. The pcb is LF HASL surface finish and LF solder paste composition is SAC305.We
Electronics Forum | Tue Oct 23 07:03:52 EDT 2007 | davef
We're not really sure. Usually when solder leaves the pads and wicks-up a component lead, it means the component lead is much warmer than the pad on the board. This is the direction we would have taken this if we hadn't taken the AgPd / conductive e
Electronics Forum | Mon Oct 22 20:41:32 EDT 2007 | jkhiew
Hi Dave, The solder has tended to wet the component termination of Ag/Pd (chip capacitor) but has not wetted the pads, whereas the solder has wetted both termination & pads when using Ag/Ni/Sn finishes. Thks
Electronics Forum | Mon Oct 22 21:34:36 EDT 2007 | davef
Double check on this, but we have this little voice in our heads telling us that your AgPd termination is intended for conductive adhesive applications. Check with your component supplier. We recall a thread on SMTnet [ http://www.smtnet.com/forums
Electronics Forum | Wed Mar 08 08:37:23 EST 2006 | Brad
Is "Lead Free" solder wick really any different than regular solder wick? It's only copper infused with flux so I don't see what the difference would be. I see in the catalogs that the LF wick costs more than the regular wick. Do I need to use LF
Electronics Forum | Sun Aug 23 20:24:59 EDT 1998 | Karlin
Hi, Does anyone has experiences in reflowing Ceramic BGA and found solder wicking ? Solder wicking has the syndrome that solder being wick from the pad and ended up in the leads. We have rule out the possibility of not printing any solder paste there
