The best advice anyone can give you concerning the choice between IAu
and IAg would be to do your homework and make an "informed decision".
Do not believe everything you hear from someone who has a vested
interest in selling you something (i.e., a company selling a particular
surface finish). Talk to real users of surface finish, read all the
published literature you can get your hands on, talk to your board
fabricators and find out what surface finishes they have and why they
prefer one over another and above all do a comparative evaluation and
evaluate the surface finishes for your particular situation.
There is lots of truth to the old quote "Once bitten twice shy".
Those who have been bitten by an ENIG problem will have little positive
to say about ENIG and the same is true for those who have been bitten by
IAg. That doesn't by itself mean that IAg is a better surface finish
than ENIG. However, I also think that there are more users in the
industry that have been bitten by ENIG than there are who have been
bitten by IAg. Another good source of knowledge is to talk to failure
analysis laboratories to find out the kinds of surface finish problems
they have been working on.
Regards,
George
George M. Wenger, Andrew Corporation
Reliability / FMA Engineer
Base Station & Subsystems Group
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Chad Renando
Sent: Monday, August 14, 2006 5:55 PM
To: [log in to unmask]
Subject: Re: [TN] Immerison Au vs Immersion Ag
I am hearing a lot of discussion about reliability and compatibility.
From
the sounds of it, it seems to be a wash. If that is the case, from a
commodity perspective, I would think you would get a cheaper price for
silver, so if shelf life is not an issue, why not go with that?
Chad
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dave Seymour
Sent: Tuesday, 15 August 2006 3:33 AM
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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