FreeLists / si-list / [SI-LIST] Re: Board Layer Material Comparison

[Scott McMorrow <scott@xxxxxxxxxxxxx>]

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
121 North River Drive
Narragansett, RI 02882
(401) 284-1827 Business
(401) 284-1840 Fax
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http://www.teraspeed.com

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