Electronics Forum: reflow and solder and problems (Page 1 of 42)

Reflow soldering problems and traces under component

Electronics Forum | Tue Jul 19 11:52:24 EDT 2016 | oleksz

Thank you Pavel. Aleksander

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:25:30 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Reflow soldering problems and traces under component

Electronics Forum | Mon Jul 18 12:24:53 EDT 2016 | oleksz

Some people involved in PCB assembly process claim that SMD components reflow soldering problems are often caused by traces running under a component. According to this claim, trace (or any copper) covered by solder mask and placed under SMD componen

Reflow soldering problems and traces under component

Electronics Forum | Tue Jul 19 08:26:46 EDT 2016 | pavel_murtishev

Aleksander, The answer is no. Solder deposit being printed is 80um-150um in height depending on PCB design what is two times higher than any track covered by solder mask. Molten solder will merely center the component. QFNs are prone to soldering

PLCC 44 and QFP 240 tilting problems

Electronics Forum | Sat Feb 17 14:21:54 EST 2007 | Muhammad Haris

Hi All, I am using YV100Xg YAMAHA Pick and Place Mounter Machine and I am facing a tilting problem of PLCC 84 and QFP 240 pins ICs. I deeply checked about their vision files and place them on the double sided tape and found them ACCURATE on their pad

Lead-free and Leaded solder in the same reflow

Electronics Forum | Tue Jan 31 12:13:26 EST 2006 | Calvin Kolokoy

Today's regular Sn-Pb paste chemistries are designed to run at higher peak temperatures ensuring that your lead-free alloys will coalesce with your regular Sn-Pb solder. That being said, it is do-able to solder both types in one oven. Generally, wit

Lead-free and Leaded solder in the same reflow

Electronics Forum | Tue Jan 31 14:23:39 EST 2006 | samir

Chunks, For our lead-free eval, we had the same problem with "charred looking" solder paste up the component termination of one of the smaller discretes, coupled with excessive solder balling...this smaller part did see peak temps in the 240 range -

Lead-free and Leaded solder in the same reflow

Electronics Forum | Fri Feb 03 16:40:24 EST 2006 | Mike

At my last employer, we ran a number of tests to make a "Hybrid" profile work (same profile Joe lists) . It worked great for everything but BGAs. The problem (6 months ago) was using parts not rated for lead free reflow temps. As the market fills wit

PLCC 44 and QFP 240 tilting problems

Electronics Forum | Tue Feb 20 18:04:53 EST 2007 | coop

I am not familiar with the YV100XG pick & place but you might want to increase the mount height of these components The double stick tape isn't as thick solder paste. it might be pushing the component too far down causing it to twist. I encountered

Intermetallics and reflow profile

Electronics Forum | Tue May 02 15:29:14 EDT 2000 | M. F. Roe

I am looking for public papers or articles on intermetallic formation as a function of reflow profile. Most solder paste vendors specify peak temperature and time above liquidus, but I am particularly interested in what happens to intermetallic grow

  1 2 3 4 5 6 7 8 9 10 Next

reflow and solder and problems searches for Companies, Equipment, Machines, Suppliers & Information