[SI-LIST] Re: ENIG vs Electroplated Gold over Electroplated Nickel
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- To: Jeremy.Scuteri@xxxxxxxxxx
- Date: Thu, 13 Mar 2014 17:48:03 -0400
Jeremy
Yuriy Shlepnev of Simberian and I have written a research paper on this.
Slides from our presentation are available at the link below. In short,
it is the Nickel that is the problem. There is no problem with using ENIG
or other nickel-gold plating over pads. Over traces, you will see
increased losses. Whether the losses are substantial enough to cause
problems with your design will depend on your design.
http://www.simberian.com/Presentations/NickelCharacterizationPresentation_emc2011.pdf
On Thu, Mar 13, 2014 at 5:17 PM, Scuteri, Jeremy
<Jeremy.Scuteri@xxxxxxxxxx>wrote:
> I am trying to understand when ENIG should be avoided (if ever). I have
> heard that it should be avoided on outside layers because it is very high
> loss. At what frequencies does this start to matter? Is Gold over
> Electroplated Nickel a better alternative?
>
> Thanks,
> Jeremy Scuteri
>
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Scott McMorrow
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