Electronics Forum | Mon Aug 28 14:18:21 EDT 2006 | russ
Sounds like your PCBs are now white tin. Change this to another roHS compliant finish and see if prob goes away. You must get control of the materials that you are being asked to build. Your Customer needs your advice on surface finishes, they sho
Electronics Forum | Tue Jan 30 09:43:52 EST 2007 | Milas
Hi Does anyone know of any potential issues with using a ENIG pcb finish for lead free manufacturing ? I was once told that a pcb manufacturer found some "Pink Residue" on a batch of boards that had been finished with ENIG and been used for lead f
Electronics Forum | Fri Aug 24 11:03:15 EDT 2007 | hussman
I agree with Joris. But to add to his comment, the type of finish also has a direct affect to your wave solder process. Going from a gloss finish to a matte finish may help a lot. As for humidity affecting your wave - I doubt it. I use a water
Electronics Forum | Mon Aug 18 20:46:08 EDT 2008 | davef
Volume of paste = 2X volume of the hole Questions are: * Why does your customer want the hole filled with solder? * Would materials other than solder be acceptable? * We assume 0.020" is drill size. What is the finished size of the hole? * What is t
Electronics Forum | Fri Apr 23 14:27:22 EDT 2010 | hegemon
I am concerned about a 'tarnishing' effect after moisture bake out that affects solderability on a batch of PCBs. This finish is new to us,and I am wondering if anyone has ideas about how to drive the moisture out of the boards without compromising
Electronics Forum | Mon Dec 20 08:23:30 EST 2010 | johanhuizing
The buyers in our company like to change the PCB finishing because of reducing costs. The proposed change is going from Ni/Au to HASL lead free, I know that in the beginning of the lead free period there where a lot of problems to use the HASL especi
Electronics Forum | Mon Sep 17 05:48:10 EDT 2012 | stivais
Hi Ben, Yes, this could be the reason but have you ever seen solderability issues for (new) boards with LF-HAL surface finish? I have seen this only if there are surface finish quality issues for bare boards (exposed copper etc.). In this case we di
Electronics Forum | Tue Aug 22 09:49:39 EDT 2000 | galltp
Dr. Lee, We have seen a small decrease in shear strength for Pb/Sn plated components attached with Sn/Ag/Cu solder compared to components with a Pb-free finish. With the jump in the cost of Pd, we are struggling to define a practical Pb-free
Electronics Forum | Mon May 14 09:24:36 EDT 2001 | rkevin
Can anyone shed some light on this for me ? Subject: Soldering to Immersion Tin surface finish I am looking for info. (pro and con) and/or 1st hand knowledge processing PCB's with Immersion Tin finish through SMT and Wave. Do profiles need to be di
Electronics Forum | Wed Feb 25 09:40:31 EST 1998 | Doug Romm
Steve, TI does not produce any SOTs using Palladium finish leadframes. I would certainly be interested to know who is. Also, your observations are correct: In TI experience the mechanical strength of the solder joints with Pd finish ICs is alw
