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June 2006

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Subject:
From:
Lee parker <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Lee parker <[log in to unmask]>
Date:
Fri, 23 Jun 2006 11:31:31 -0400
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Bob

I have used immersion silver numerous times in this application and the
experience has been very positive.

Best regards

Lee


----- Original Message -----
From: "Bob Walker" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, June 23, 2006 10:42 AM
Subject: [TN] PCB surface finish / EMI gasket


> Hi All,
>
> Does anyone have any experience with what type of PCB surface finish to
> use
> with an EMI gasket? Or can anyone point me in the direction of any good
> websites  where I can learn what I need to know.....I'm not a materials
> kind of guy.
>
> There is a 10G transceiver on my PCB design that contains an EMI
> elastomeric
> gasket that is made of conductive rubber and will come in  contact with a
> portion of the conductive surface of the PCB. Because of the RoHS
> directive,
> I've been leaning towards using an Immersion Silver finish for  various
> reasons.
> But, I have a concern about the potential tarnishing  effects of the
> finish
> over time. Will the seal between the silver finish and the  gasket degrade
> over
> time? Is there anything else I'm missing with regards to  using an ImAg
> finish
> with an EMI gasket?
>
> TIA for any feedback....
>
> Regards,
> Bob Walker
> CebaTech Inc.
> [log in to unmask] (mailto:[log in to unmask])
> [log in to unmask] (mailto:[log in to unmask])
>
>
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