Scott,

I believe all of your statements to be correct.  The shelf life is approx
12 months, IAg is MUCH less expensive than ENIG, and organic materials are
added to the IAg process to deter oxidation.  I'm not sure what your FAB
shop was thinking.

Shawn M. Parson

Precision Analytical Laboratory
4106 Cartwright Drive  Ste A
Kokomo, IN  46902
(765) 455-1993

> I just got off the phone with one of our PCB FAB shops and was surprised
> on his response to Immersion Silver as a solder finish.
> He suggested that we do not use it as a replacement for HASL and to use
> gold instead.  All the things I've read and did research on IAg in
> contraction to he said.   The shop said shelf life is less than 6 months
> and tarnish was a big issue.  It was more expensive than ENIG and not
that many shops do it in-house.
>
> My understanding is the shelf life is 6-12 months if stored and handled
> properly.  They silver used today has an anti-tarnishing agents to prevent
> tarnishing.  I was also under the impression that IAg is less costly than
> ENIG.
>
> Your opinion in this matter would be greatly appreciated.
>
> Thank you,
>
> Scott
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 1.8e
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
> for additional information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> -----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------