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".
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 | Thu Nov 30 22:47:54 EST 2000 | CAL
Contact Lee Whiteman @ ACI/empf. Lee is an industry expert in Leadfree soldering. He has also ran an IPC leadfree work shop involving a DOE on Leadfree Screen Printing. Lee can be reached at lwhiteman@aci-corp.org or 610-362-1200. Best regards, Cal
Electronics Forum | Tue May 31 22:55:08 EDT 2005 | davef
We think it will make little difference to your customer. It really depends on your customer's end-use environment though. Tough to guess. In a short time, both of pots will be "SAC" though.
Electronics Forum | Wed Nov 02 12:08:40 EST 2005 | chunks
It could be lack of preheat or flux. You can verify the flux by hand applying. I'll bet it's lack of preheat though. That's usually the case with selective solder.
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 Jan 29 20:57:06 EST 2009 | padawanlinuxero
HI!!! its a ERSA Reflow Oven HotFLOW 7 and I really appreciate some help thanks
Electronics Forum | Thu Jan 29 15:06:42 EST 2009 | padawanlinuxero
http://www.flickr.com/photos/94427924@N00/3236723528/ and 94427924@N00/3235878901/" target="_blank">http://www.flickr.com/photos/94427924@N00/3235878901/ do you guys think these is a finish problem ?
Electronics Forum | Thu Jan 29 16:48:49 EST 2009 | slthomas
Looks like a time/temperature problem to me. However, there are a lot of solder fines surrounding the pads in one photo that go beyond what I'd expect from inadequate TAL. Is it possible that the board was misprinted and not completely cleaned, or
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.
