The working draft of IPC-2221 revision B will include a Table 4-7 for Lead-Free surface finishes.

Looking at the most recent draft of this table, I see that Immersion Silver is marked as functional, all others are marked as acceptable except OSP, which has a "?" question mark. I don't know what the question mark means because I missed the conference call where this was discussed, but maybe someone out there knows? I thought you would want to hear about this even though it is not set in stone. Currently it is just a working draft and subject to change.

Look near the bottom of the page of this link (which is also subject to change) to see what I mean:
http://www.frontdoor.biz/HowToPCB/HowToPCB-Material.html 

Jack 

.

On Tue, 24 May 2011 10:05:53 -0500, Victor Hernandez <[log in to unmask]> wrote:

>Fellow TechNetters:
>
>   What is the consensus on the use of Press Fit Pins insertion into a final surface board finish of OSP or HASL?   Is there a difference in the term Press Fit Pins or Compliance Pins?
>
>Victor,
>

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