Electronics Forum | Tue Jul 24 07:57:55 EDT 2007 | davef
It sounds like the QFN component is not solderable. * Use ANSI/J-STD-002, Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires * Contact your QFN component supplier for help * Consider a more active flux, since you might
Electronics Forum | Thu Feb 28 18:03:33 EST 2008 | jdumont
What kind of circuit board are you using that can carry the amount of current that would necessitate the use of a 4 awg wire? Cant you just terminate the cable with a ring terminal and screw or swage it into the board?
Electronics Forum | Wed Apr 02 08:26:18 EDT 2008 | davef
Even though we can't comment on that specific part, you're correct. If the solderability protection on the terminations is not symetrical, it could result in tombstoning. We used to see this alot in smaller components, where the plating did not compl
Electronics Forum | Fri Aug 08 09:49:17 EDT 2008 | scottp
We've seen the exact same problem. The solder joints had negative wetting angles and x-sections show that the PdAg termination dissolved into the solder. We no longer allow PdAg terminations.
Electronics Forum | Sun Aug 10 03:39:21 EDT 2008 | eyalg
Thanks Pete yes we usu ROHS solder paste in our process. I agree that this termination is more suitable for adhsive bonding rather than soldering. We'll try changing the termination type as you recommended. Eyal G
Electronics Forum | Thu Aug 28 21:39:47 EDT 2008 | davef
Shelf life numbers don't mean dip. Are the parts solderable per ANSI/J-STD-002, Solderability Tests for Component Leads, Terminations, Lugs, Terminals, and Wires? If yes, go solder the parts. If no, get better parts from your supplier.
Electronics Forum | Thu Oct 02 10:43:37 EDT 2008 | msangabriel
I am looking for companies that fabricates special or custom SMT feeders for an Fuji IP3 machine. It is to feed a SMT terminal. Do you know of any company that you can recommend?
Electronics Forum | Fri Aug 28 05:22:47 EDT 2009 | sachu_70
Would suggest you have a re-look at your reflow profile. There could possibly be a higher thermal demand to solder the Pb-free version of these screw terminals considering that external plating has changed.
Electronics Forum | Wed Feb 03 22:29:08 EST 2010 | mika
via apertures > solderding of terminals to the pads! That is zero which means => 90 % solderjoint Terminal to pad! http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=13914&#Message58952
Electronics Forum | Thu Feb 17 12:01:16 EST 2011 | qcman012856
Having issues with soldering bottom termination components such as PQFN's. Want to begin x-ray inspection to verify wetting. Wondering about soldering acceptablility criteria?
