There is no reason that ENIG cannot be used for lead-free
product/processes. Neither ENIG nor IAg has any better or worse
compliance level to RoHS. Both finishes are totally compliant, as far as
I know.
There are arguments that IAg is a better finish over ENIG in terms of
reliability, and vice-versa, but that has nothing to do with RoHS
compliancy. Either one is acceptable. At least, I have not heard
anything otherwise. There are many OEMs and CEMs manufacturing products
intended to be RoHS compliant using both finishes. There are potential
issues associated with improper ENIG plating processes that can be
exacerbated at higher temperatures. This has nothing to do with
compliancy to RoHS, more to do with reliability issues. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dave Seymour
Sent: Monday, August 14, 2006 12:33 PM
To: [log in to unmask]
Subject: [TN] Immerison Au vs Immersion Ag

We are having a little talk about surface finish for RoHS compliance.

We have been doing Immersion Gold for 10+ years and are starting to
switch to Immersion Silver because some feel that Silver is a better
finish for RoHS compliance.

I can't find anything that says one can not be compliant with Immersion
Gold and I'm trying to figure out why the surface finish should change
at all.

Could someone point to some articles, opinions or sources that might
help resolve the issue?

I'm out doing some web looking now.

Thanks
Dave



--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560

Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297

[log in to unmask]

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