Electronics Forum | Fri Jan 26 08:44:40 EST 2007 | dsteffler
Had the same thing happen here. If the thermocouple line shorts out the temperature appears to go runaway (999F or whatever the max of your software is). Ours was a short out in a socket where the thermo plugged in to pass through the frame. Regar
Electronics Forum | Thu Feb 08 08:25:57 EST 2007 | realchunks
Your risk is very high that the solder paste on the blind parts will dryout and hole the parts to the board but not actually reflow. They will pass electrical test but fall off in the real world. Blind soldering is a very high risk process.
Electronics Forum | Thu Mar 01 11:47:20 EST 2007 | Wagoner
Run the lead free BGA side first. Then run the tin lead side second. We do this on some boards so that we don't overheat the components on the second side. There is no reason that the lead free solder needs to reflow on the second pass.
Electronics Forum | Fri Jun 01 17:32:31 EDT 2007 | Chris
Im having problems with electromigration post a IEC - 60601 test (95% humidity for 48 hours). Im looking for a lead-free NC wire solder that will pass. Does anyone know of any that will work? Thanks, Chris
Electronics Forum | Fri Jun 01 17:34:19 EDT 2007 | Chris
Im having problems with electromigration post a IEC - 60601 test (95% humidity for 48 hours). Im looking for a lead-free NC wire solder that will pass. Does anyone know of any that will work? Thanks, Chris
Electronics Forum | Wed Feb 20 09:05:38 EST 2008 | tonyamenson
We had a similar problem with lead-free through-hole components. We baked those baords to remove the residual moisture and everything went to 100% pass - defect was gone. Couldnt hurt to try a sample run while you decide if the PCB holes need to be
Electronics Forum | Thu Aug 23 09:52:38 EDT 2007 | d0min0
Hi, in past we had an issue with ENIG surface, black was Ni that get pass the Au - but it was discovered after reflow (SnPb) and the IC was losing contact with Cu tracks...at customers application :| Reason was as I remember too thin Au sufrace... w
Electronics Forum | Tue Mar 17 17:07:07 EDT 2009 | keithej2
Engineering tried it with special made .4 nozzles (which we could never get to pass a center test reliably) but the results were less than spectacular. The reject and bad placement rates were high so that idea was abandoned.
Electronics Forum | Fri Apr 11 15:27:59 EDT 2008 | realchunks
Sure thing Steven. I understand you're a glazzed, chocolate donut kind of guy. Should be easy to pass your audit. But bring your glasses - not for our facility (glasses free thank you) but for the night life!
Electronics Forum | Wed Apr 30 07:50:34 EDT 2008 | realchunks
I've done it in the past. By-pass it and you'll be back in production. Make sure your power is off.
