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

About this list Date view Thread view Subject view Author view

From: Larry Miller (ldmiller@nortelnetworks.com)
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:doug@eskimo.com]
> Sent: Friday, June 23, 2000 9:23 AM
> To: Ali, Hassan [KAN:0G15:EXCH]; si-list@silab.eng.sun.com
> 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
> .
> ************************************************************
> Doug Brooks' book "Electrical Engineering for the Non-Degreed
> Engineer" is now available. See our web site for details.
> .
> Doug Brooks, President doug@eskimo.com
> UltraCAD Design, Inc. http://www.ultracad.com
>
>
> **** To unsubscribe from si-list or si-list-digest: send e-mail to
> majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu
> ****
>

**** To unsubscribe from si-list or si-list-digest: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:43 PST