Electronics Forum | Wed Nov 21 16:56:46 EST 2007 | pms
Thanks folks, Yes, we do not have enough info yet to make decisions at this point. Just trying to get a feel what folks would do in this case. Enig,Black-Pad-Nickle skips....Always concerned about ENIG. Silver finish? Is this better? DaveF, Thank
Electronics Forum | Sun Aug 03 08:27:41 EDT 2008 | davef
IPC-4553, Specification for Immersion Silver Plating for Printed Circuit Boards, 1.4.1 Solderability. This primary function of IAg is to provide a solderable surface finish, suitable for all surface mount and through-hole assembly applications and wi
Electronics Forum | Fri Feb 26 09:58:01 EST 2010 | markhoch
Good Morning! Could one of you PCB Fab Gurus (DaveF)please school me on the differences between a "Galvanic Gold" finish and ENIG? I have a customer requesting Galvanic Gold, and to be honest, after 18 years in Contract Manufacturing, I've never real
Electronics Forum | Sat Aug 20 13:23:22 EDT 2011 | saju86ece
Hi, We are facing solder ball issue in Chip component of PCB. We had tried DEK parameter setting changes and also reflow setting but still now not yet solve this problem. board details are, 1.Class 2 prodct 2.HASL Finishing Plz advice me what actio
Electronics Forum | Thu Oct 11 17:15:31 EDT 2012 | boriskilk
We have seen two issues which have caused problems with solder mask adhesion. The first was improper curing of the mask but also solder temps which were too high, particularly with a white tin finish. Rather than tell your supplier their material i
Electronics Forum | Thu Nov 15 03:07:35 EST 2012 | nikyta
Thanks for your reply. As already said by Anvil1021, is not a good idea to mix Lead and Bismuth! Stay away from Bismuth if you have even the slightest traces of Lead on yours PCB, stencil, squeegee, spatula, blade, cleaning paper or cleaning cloths,
Electronics Forum | Wed Jan 07 14:33:00 EST 2015 | eezday
The assumption that a HASL Sn63 PCB can be soldered with SAC solder paste is likely a bad one. The board itself is likely FR4 which can be damaged by lead free temperatures. The HASL finish isn't an issue from the perspective of it's makeup and actu
Electronics Forum | Mon Feb 09 09:45:16 EST 2015 | saoasasd
Thanks for the support Jax. Our current scenario: Baking - Not allowed for PCBs Washing - Not allowed Heat Cycles - 2 (Bottom and top side). It's a notebook board Our concern is related to solderability because OSP finishing will be seriously imp
Electronics Forum | Mon Jun 20 14:01:37 EDT 2016 | babe7362000
Does anyone know of anyone that would inspect our Finished PCBs using photos for their software, instead of shipping out the PCB's? We have boards that are quite heavy. We need them inspected for thru hole accuracy. Or if you know any software th
Electronics Forum | Fri Feb 17 09:08:22 EST 2017 | davef
An interesting paper on the topic is "The evolution of surface finishes in mobile phone applications" by Claus Würtz Nielsen at Nokia Mobile Phones R&D [http://www.cicmt.org/adv_micro/papers/Nordic2004paper.pdf] The paper reported corrosion problem
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