Electronics Forum | Thu Mar 17 10:30:06 EST 2005 | davef
This happens. You may need to put a dot of chip bonder on the corner of the floating QFP after first pass. What size are the QFP that are moving?
Electronics Forum | Wed Jul 12 13:56:49 EDT 2006 | muse95
From a design/test/troubleshooting perspective, I would pick a QFP hands down - I can't probe a hidden solder ball.
Electronics Forum | Sat Sep 15 01:42:36 EDT 2007 | mun4o
Hi, I attach the termocouples with high temperature solder wire, at the QFP pins.Other thermocople I attach at package with high temperature tape.
Electronics Forum | Wed Sep 19 21:08:28 EDT 2007 | wailiang81
Those others parts also happend printed not accurate, but there is no solder problem. Only the QFP area looks bad condition.
Electronics Forum | Tue Dec 04 16:00:42 EST 2007 | 18424
Hi, I was wondering if any of you operators/users have experienced any reflow solderability issues with any of the ATMEL QFP components with in the last three months. Leaded or lead free processes?
Electronics Forum | Wed Oct 01 04:43:36 EDT 2008 | omid_juve
we need a soldering nozzle for this package that can be placed by the rework machine on a pads of this qfp (to make the pads planar) and then send a hot air and after the solder joint melt stop the hot air and pull up the nozzle do we have such mach
Electronics Forum | Wed Oct 01 10:59:13 EDT 2008 | realchunks
Wouldn't it be cheaper to by quality parts? Most repair operators can solder a QFP 208 with a regular soldering iron, eyes closed and hands behind their back. If you are just touching up the leads because of co-planer leads, a regular iron is all
Electronics Forum | Sun Sep 27 11:41:13 EDT 2009 | rajeshwara
We are using ST Demodulator QFP in our product which have exposed pad / heatsink from bottom side. Visually or in magnifier the solder joint or fillet looks good but if we touch up the pins with soldering guns , PCB works fine.
Electronics Forum | Fri Jan 08 02:25:42 EST 2010 | graceytiu07
Happy New Year to All: Has anyone of you encountered a solder short on QFP pin yet there's no evidence of bridging in between gaps? I am using an SnPb solder paste.
Electronics Forum | Fri Jan 08 21:34:44 EST 2010 | isd_jwendell
Not specific to QFP, but I had a run of poorly etched boards. I could see the short using 75X magnification with back lighting, but only some of the time. Nasty little shorts on ~25% of the boards that cost us a boat-load of cash.
