Electronics Forum | Fri Jun 21 13:41:48 EDT 2019 | slthomas
Another question - how would you classify a "pure tin" (supplier term, not mine) alloy with .12% Ni specified? is this a common Pb-free HASL alloy?
Electronics Forum | Wed Oct 30 18:19:17 EDT 2019 | slthomas
We use ENIG whenever possible, to the extent that we will try to talk customers out of Pb-free HASL until our keyboard punching fingers bleed. It's much more solderable than HASL and it's flat.
Electronics Forum | Thu Oct 31 06:11:26 EDT 2019 | spoiltforchoice
> We use ENIG whenever possible, to the extent that > we will try to talk customers out of Pb-free HASL > until our keyboard punching fingers bleed. It's > much more solderable than HASL and it's flat. Ditto
Electronics Forum | Tue Jun 16 14:35:13 EDT 2020 | dwl
for the fiducials, try a donut shape instead of a disc. The HASL solder seems to settle more evenly on a donut than it does on a dic.
Electronics Forum | Thu May 13 16:55:51 EDT 2021 | emeto
With Pb-Free HASL you can't use Pb process for sure as the melting point of tin is so much higher than the lead paste process. SAC305 is the most popular compound, unless your assembly requires something else for a specific reason.
Electronics Forum | Fri Jun 29 05:50:27 EDT 2001 | nifhail
Thank Dave, your information was really helpful. Now that I have another few thousands of old datecode PCBs which has an Entek and HASL finished. Entek PCBs are about 6 � 1.5 years old and HASL boards are at 1 - 2 years old. To make it worse, s
Electronics Forum | Fri Jun 18 12:36:52 EDT 1999 | Brian
What is the future of HASL with lead-free solders? I have grave misgivings as, even if it works properly (which I'm not too sure about), the alloy will have to match that used in the soldering process, or nearly so. No use using a Bi-containing HASL
Electronics Forum | Tue Sep 26 00:42:36 EDT 2006 | fctassembly
Hello Brad, I think Greg is a mind reader!! Thanks for the opportunity to give an update to the forum on SN100CL Lead Free HASL. Conversions to SN100CL HASL is occuring at a rapid pace worldwide. As of July 2006, there were over 250 HASL machines ru
Electronics Forum | Mon Jun 30 08:55:31 EDT 2008 | davef
It will be tough to find a dimensional thickness specification for HASL. IPC-6012 Table 3-2, line "Fused tin-lead or solder coat - Coverage and Solderable" states the requirement that there has to be complete coverage of solder on the land, and it mu
Electronics Forum | Fri Mar 26 15:48:31 EDT 2021 | grahamcooper22
Leaded HASL on small pads can be quite difficult to print on...the HASL tends to be domed rather than flat..and that can affect print quality...you really need a perfectly flat pcb pad to print paste on when you are assembling 0.5mm QFPs. If the pcb
