Electronics Forum | Tue Jul 01 13:35:49 EDT 2008 | realchunks
QFNs have pads on the bottom. LCCs have pads on the sides that are exposed on the bottom.
Electronics Forum | Thu Jan 29 12:57:37 EST 2009 | wavemasterlarry
Only if it has exposed ends on the end.
Electronics Forum | Thu Oct 01 06:18:10 EDT 2009 | rajeshwara
METHOD OF VIA DESIGN AT EXPOSED PAD FOR QFN/QFP.
Electronics Forum | Fri Nov 04 21:59:36 EDT 2011 | machinehead
LOL I agree But the "He" is a "She" LOL
Electronics Forum | Mon Sep 09 21:54:01 EDT 2013 | mandysmile
Hi, rod, The exposed copper area you could do with ENIG. It is with good solderability.
Electronics Forum | Mon Jun 27 09:38:30 EDT 2005 | Bob R.
What problems are the quality people seeing? I hope they aren't expecting a toe fillet. QFNs are typically cut from an array after plating. This leaves exposed copper on the sides of the part. We'll often see smearing from the sawing process that
Electronics Forum | Thu Feb 16 16:16:19 EST 2006 | fredc
We saw something like this in the machine shop years ago. Fumes from a soldering operation in the shop turned exposed iron and steel tools and the spindle on my Bridgport mill green. Can your supplier apply plating or a coating to the exposed parts o
Electronics Forum | Mon Feb 20 07:59:50 EST 2006 | dpmilk
We saw something like this in the machine shop > years ago. Fumes from a soldering operation in > the shop turned exposed iron and steel tools and > the spindle on my Bridgport mill green. Can your > supplier apply plating or a coating to the >
Electronics Forum | Thu Mar 30 13:15:17 EST 2006 | gregp
Maybe the issue is how the feeders are being unloaded. The operators should leave enough covertape to reload the reel onto a feeder without component waste. If the issue is some parts are exposed in the feeder then you will most likely loose those p
Electronics Forum | Wed Nov 17 10:03:29 EST 2010 | scottp
Instead of a minimum thickness, we require no exposed copper or SnCu intermetallic. We've been having a lot of trouble lately with suppliers of SN100 HASL boards giving us pads with very irregular solder deposits with areas of exposed intermetallic.
