[SI-LIST] Re: Board Layer Material Comparison
- From: Scott McMorrow <scott@xxxxxxxxxxxxx>
- Date: Tue, 07 Sep 2004 12:14:12 -0400
Another correction.
SI-glass has slightly lower loss than normal S-glass used in most laminates.
should be
SI-glass has slightly lower loss than normal E-glass used in most laminates.
Scott McMorrow wrote:
> One correction,
>
> there is a slight advantage in dielectric loss of N4000-13 SI over
> 4000-13.
> N4000-13 SI - lossTangent = 0.008 - 0.010
> N4000-13 - loss Tangent = 0.009 - 0.012
>
> SI-glass has slightly lower loss than normal S-glass used in most
> laminates. However, this difference is minimal when compared to FR-4
> which has a loss tangent of around 0.02 or higher. The advantage of SI
> material is in its low Er, lower even than Rogers 4350B, and better
> dielectric uniformity.
>
--
Scott McMorrow
Teraspeed Consulting Group LLC
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(401) 284-1827 Business
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