RE: [SI-LIST] : Merits of low dielectric constant

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From: Larry Miller ([email protected])
Date: Fri Jun 23 2000 - 09:45:15 PDT


I still vote for dissipation (loss tangent) as being the real parameter of
concern at high frequencies.

Larry Miller

> -----Original Message-----
> From: Doug Brooks [SMTP:[email protected]]
> Sent: Friday, June 23, 2000 9:23 AM
> To: Ali, Hassan [KAN:0G15:EXCH]; [email protected]
> Subject: Re: [SI-LIST] : Merits of low dielectric constant
>
> Well, on closer inspection, I see the question was more on Capacitive
> loading.
>
> So, let me try this on you .......
>
> Co (intrinsic capacitance) is directly proportional to Er
> The correction factor for Zo for capacitive loading is proportional to
> SQRT(Co) for small Co
>
> Therefore, the correction factor for Zo for capacitive loading becomes
> proportional to SQRT(Er) for small Er.
>
> Therefore, the correction factor is smaller for smaller Er.
>
> Am I on the right track?
>
> Doug Brooks
> .
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>
>
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