Electronics Forum | Mon Jul 30 10:17:26 EDT 2007 | davef
immersion ...easily changes color.. See that's the GREAT thing about immersion coatings. If they change color, they probably will not solder well. Try that with other coatings.
Electronics Forum | Thu Jul 26 23:57:47 EDT 2007 | gioblast
Good day.. anyone who have read the best guide on pb-free pcb plating?? I know immersion is the best but the storage controls sucks..easily changes color..ANYONE WITH A BETTER kNOWLEDGE ON HOW TO CONTROL? OR better plating ...enig?? why?? please. all
Electronics Forum | Fri Jul 27 10:07:18 EDT 2007 | rgduval
Our preference has been ENIG. We find that we achieve higher quality (visually) soldering for through hole and surface mount parts, with less handling issues than when we use white-tin, or immersion tin. We are about to do a test on some boards tha
Electronics Forum | Sat Jul 28 08:37:52 EDT 2007 | davef
There is no good choice. Board Finishes: Industrial/Battelle Class 3 Environment [Reliability Knowledge Gaps: For use of Pb-free solders in High Reliability Applications, J Smetana, iNEMI Availability of SnPb-Compatible BGAs Workshop, March 1, 2007,
Electronics Forum | Fri Dec 23 23:29:17 EST 2005 | azbvc
Slaine, thank you for sharing..
Electronics Forum | Fri Dec 23 06:09:04 EST 2005 | Slaine
good report showing lots of sections and compairng differnet pcb finishes http://www.smartgroup.org/experience/experience%20report%202005.pdf
Electronics Forum | Sat Dec 24 08:26:41 EST 2005 | GS
Thank you, very intersting. Seen they've experimented also Sn Cu Ni on wave solder. Rgards............GS
Electronics Forum | Wed Feb 20 23:17:34 EST 2002 | surachai
I AM JUST EVALUATION LEAD FREE EVALUATION AND FOUND THE BIG PROBLEM OF SOLDER CRACK BETWEEN TERMINAL OF COMPONENT AND THE INTERMETALLIC LAYER OF LEAD FREE ALLOY BUT DON'T FIND ANY CRACK BETWEEN SOLDER AND SURFACE OF PCB , COULD YOU HELP ME VERIFY T
Electronics Forum | Tue Nov 16 06:52:44 EST 2010 | cacace
1 um". Some PCB manufacturer is telling me that this specification is not feasible in production. I would know if this position is due to the equipment (or process control) they have, or if in effect is not possible to satisfy my requests.
Electronics Forum | Wed Nov 17 07:39:20 EST 2010 | jax
Most PCB manufacturers should be able to fall between 1.25um-5.00um for Pb-Free HASL. I doubt you will get anyone to agree to anything higher. If you are going to require an average thickness, make sure you also state "No Copper exposure allowed".
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