Electronics Forum | Wed Feb 07 15:18:16 EST 2007 | dphilbrick
Tintronics in Huntsville AL can do this. PS I use them all the time for various services. I have no affiliation with them other than being a customer.
Electronics Forum | Wed Feb 07 16:40:15 EST 2007 | russ
Be sure that this component temp during operation does not exceed the low temp of the solder. (it has happened in similar situation) Very good idea though Russ
Electronics Forum | Wed Feb 07 17:17:58 EST 2007 | russ
I would not be concerned about the reliability when doing this, I re-read your post and am familiar with this type of process. Russ
Electronics Forum | Wed Feb 07 17:32:15 EST 2007 | davef
If you can't find bismuth wire, use 42Sn58Bi. For more, look here: http://www.mrs.org/s_mrs/bin.asp?CID=2274&DID=48689&DOC=FILE.PDF
Electronics Forum | Wed Feb 07 18:30:11 EST 2007 | greg york
or low melt Sn/Pb/Bi alloy, readily available and fairly cheap.If your UK based I will send you a sample if it will help you prove it cheers greg
Electronics Forum | Wed Feb 07 18:40:39 EST 2007 | bill
What is an acceptable mismatch for smt components and pcb. We are having cracked solder joints from fatigue after repeated thermal cycling 25 deg. c to 125 deg.c.
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 | Fri Feb 09 07:59:55 EST 2007 | jax
Look for a new shield. For the exact reason already mentioned, most shields are available in two piece units. You install the frame when installing everything else... You clip the top on later.
Electronics Forum | Thu Feb 08 08:15:28 EST 2007 | tjcrume
I have received 10 customer returns for a cold solder joint on 1 lead of a 36 pin IC. Everytime it is on the #18 pin. The process is reflow and I can't figure out why the one leg is cold and the other legs look OK.
Electronics Forum | Thu Feb 08 08:54:56 EST 2007 | jhaviland
groundplane not heating properly.. Is it a J leaded IC? sometimes these get bent slightly in the packaging and sit just far enough off the board to cause solder problems.
