Electronics Forum | Thu Nov 10 13:55:25 EST 2005 | 1st Article
Milroy, Another thing to look at is your wave profile. Check speed and pre-heat, if flux gets burned off before reaching the wave then bridging is expected, a common way to check for speed is to time the point of first contact through the sub-merge
Electronics Forum | Thu Aug 20 18:20:21 EDT 2009 | joeherz
Sergey, With that many leads and contact surface area points, it doesn't make sense that the part would move as it has without a gust of wind.... What is your confidence that you don't have an MSD issue on this part. Being that it is a TQFP, it's
Electronics Forum | Mon Nov 28 09:46:24 EST 2005 | pjc
I have waved gold (ENIG) boards. That's a pretty hot pot at 260C, wow. I have used 245C with good results. All other parameters look OK a glance. Well, PCB temp looks a little hot too at 130C before pot. 90-100C is typical for most No-Clean flux. At
Electronics Forum | Fri Sep 03 06:53:38 EDT 2010 | arjan
Yes, we assembled a lot of QFN in the last years, but we don't have a X-ray machine by ourself, so we cant't inspect each device. This type LGA was designed on a prototyping board of our customer so we would validate our LGA reflow process and a rese
Electronics Forum | Mon Oct 28 11:42:40 EDT 2013 | davef
Two most important parameters are: * Solder temperature is the temperature of the solder * Dwell time is the time that the board remains in contact with the molten solder Several things that you should consider are: * First, here's how to design an
Electronics Forum | Thu Aug 05 05:23:13 EDT 2004 | Bryan
Hi All,per my understanding ,the fail mode is the heel fillet of QFP seems no good,right?If yes...I think..we should:1.increase the aperture length on stencil and make sure there's enough solder paste on pad before reflow. or you can increase your t
Electronics Forum | Mon Dec 17 13:58:54 EST 2007 | ck_the_flip
I made my own wave measuring device using KIC2000 system. KIC2000 has automatic wave detection, so now I have a profiler for both reflow ovens and wave solder. The delmat carrier only cost $500. A guy, Samir, from this forum gave me the idea, actu
Electronics Forum | Tue Jul 06 05:00:33 EDT 2010 | smthexi
Hello Sid: i don't know where you bought the machine. the central support system is an addition part, it is specially designed to prevent the PCB board from bowing. i know that the wave soldering machine which made before did not include this useful
Electronics Forum | Tue Jul 12 09:51:42 EDT 2005 | russ
We use the JBC irons with and without the "leadfree" tips. We really have not noticed much difference between the standard and the lead free. The lead free tips do last a little longer but the tips are somewhat deformed by the extra plating. As f
Electronics Forum | Wed Jan 30 17:48:31 EST 2002 | davef
Expanding on a previous poster's comments ... Vapor Phase Soldering. A solder reflow technology that uses a heated solvent to melt the solder. Buried deep in the recesses of the SMTnet Library is �Terms & Definitions�. We started using vapor phas
