Electronics Forum | Sat Jun 17 08:57:23 EDT 2000 | Chrys Shea
A few more tricks to try: - Got a hot air rework machine? You can get more controlled heat on the area and lower the risk of damage to the fab. I never got topside fillets un unrelieve ground planes until I went to convection preheat on my waves.
Electronics Forum | Wed Aug 21 20:11:34 EDT 2002 | mitch
We are going to begin using a 64 pin 10mm QFP with 0.5mm lead pitch. I was recently asked if we need to purchase our PCB with E3 coating instead of tinned pads when using the .5 pitch. The concept being suggested is that the E3 coating will give us b
Electronics Forum | Sun Sep 13 09:21:26 EDT 2009 | davef
You as, "What data is available showing the long term reliability of the intermetallics of the solder joints?" Alloy||Microstructure Sn-Pb||Lamella or globules Sn-Cu||Sn-matrix, Cu6Sn5 needles or globules Sn-Cu-Sb||Sn-matrix, cuboids of SbSn and Cu6
Electronics Forum | Mon May 12 15:13:29 EDT 2014 | emeto
Thank you guys. As we are speaking I keep examine the problem and here is what I got so far. 1. I measured the temperatures on my profile and the lead is hotter than the board. The lead goes 12 seconds earlier than the pad and is taking the solder.
Electronics Forum | Sat Sep 12 14:10:38 EDT 2009 | GSx
First, make sure that 63/37 BGA can withstand higher reflow temperature of of lead free SAC305 GSx
Electronics Forum | Thu Mar 11 01:54:55 EST 1999 | Marcus Reichenberger
Hello everyone, at the Institute for Manufacturing Automation and Production Systems of the University of Erlangen (Germany) one focus of our research activities is the use of lead-free solder alloys for electronics production. In different publicat
Electronics Forum | Thu Oct 31 12:33:14 EDT 2013 | pbarton
You should have no difficulty with QFN or QFP parts when using non-RoHS solder. The QFP's are most likely to have tin plated leads and the metallisation on the QFN lands the same, or ENIG. Check the component part datasheets to verify the plating an
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 | Fri Jun 19 08:08:17 EDT 2009 | patrickbruneel
Stephen, What does the nurse say about lead-free? You can eat as much as you want? You don’t have to wash your hands anymore? Sorry couldn’t resist.
Electronics Forum | Wed Dec 17 17:09:03 EST 2003 | Gabriele
Clean or No Clean Solder Paste
