Electronics Forum | Tue Dec 19 21:23:39 EST 2006 | davef
We'd suggest using your connector supplier recommendations. Some use: * Pad Plating: 20-30 uin Au over 50 uin Ni (You might get away with less gold) * In-Pad Vias: less than half the diameter of the button (for contact-only configurations) * PCB/C
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 | Fri Sep 21 14:45:36 EDT 2001 | jschake
I asked several people their opinion of HASL 0201 pads and there was no positive feedback whatsoever. The most common concern was the domed/convex shape of the pad finish that would result in aperture gasketing problems, which you may already have e
Electronics Forum | Tue Sep 18 13:21:06 EDT 2001 | fcouture
Hello Jeff, I found some good information from what I read until now...so thank you! I have two questions: 1) What finish did you use on the PCB for 0201 ? I think with an aperture so small (12x15mils) tin plated is impossible, what do you think
Electronics Forum | Wed Sep 19 16:02:14 EDT 2001 | fcouture
Pad Metallurgy Used: >Is your question about this targeting the current industry capability of using tin plating technology on such small >pad dimensions? Actually I should have asked for tin/lead plating (HASL) and yes it's to have an idea on capab
Electronics Forum | Thu Feb 22 16:40:23 EST 2007 | mika
One of our customers that always was going for Ni/Au surface finish on RoHS PCB and our processs was adjusted for that, "whithout any problem". Recently they decided to switch to another surface finsh: PbFree HASL. What is that? Imersion tin/silver?
Electronics Forum | Thu Mar 13 14:12:31 EDT 2014 | davef
You're creating a new alloy on the surface of your board. The alloy will have a melting point determined by the constituent metals of the alloy. Your alloy consists of: * Lead-free HASL solderability protection on the board * Lead-free solder paste *
Electronics Forum | Tue Nov 01 14:50:05 EDT 2016 | dyoungquist
The bare pcb has lead HASL finish. Components are lead-free and lead-free solder was used to solder the plate-through components. Is this acceptable or will there be reliability issues?
Electronics Forum | Tue Mar 25 11:25:18 EDT 2014 | horchak
The first impression I get is that the mask was applied over dirty or contaminated copper. What is the trace and land finish on the PCB? You also appear to have a wetting problem.
Electronics Forum | Fri May 11 10:30:26 EDT 2001 | rkevin
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 different? Solderpaste considerations? Anything else? In the past I have experienced selective non
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