RE: [SI-LIST] : Upper limit of interplane capacitance

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From: Larry Smith (ldsmith@lisboa.eng.sun.com)
Date: Thu Jun 15 2000 - 08:46:32 PDT


Greg - it is a bit of a stretch, but if I go back to my Quantum
Mechanics from years ago, I think the dielectric loss is more of
a sonic phenenon than a photo electric effect. With the photo
electric effect, a packet of energy is obsorbed that is exactly
right to lift an electron from one energy state to another. When
the electron falls back it emits a photon.

With dielectric loss, molecules physicaly vibrate more like a
sound wave. The losses show up as thermal rather than electromagnetic
energy. But you are correct, dielectric loss is a material property.

I'm sure somebody will tell me if this is completely off base...

regards,
Larry Smith
Sun Microsystems

> From: gedlund@us.ibm.com
> X-Lotus-FromDomain: IBMUS
> To: si-list@silab.eng.sun.com
> Date: Thu, 15 Jun 2000 09:23:26 -0500
> Subject: RE: [SI-LIST] : Upper limit of interplane capacitance
> Mime-Version: 1.0
> Content-Disposition: inline
>
> Larry and Erik,
>
> [Erik Daniel wrote]
> > I agree with most of your comments on power plane capacitance, but I have
> to
> > disagree with one point -- dielectric loss does NOT decrease with
> decreased
> > thickness of the dielectric -- dielectric loss is independent of the
> > dielectric thickness in particular, and all geometrical concerns in
> general
> > (unlike skin-effect loss).
>
> Someone once explained dielectric loss to me as absorption of the energy
> in the E/M field by quantum resonances in the molecules that make up the
> dielectric material. In my mind, I thought this sounded analogous to the
> photoelectric effect, where you shine light of a particular frequency on
> an atom and it gets absorbed if the frequency corresponds to one of its
> quantum states. Is this truly the physical origin of dielectric loss?
> If so, that would explain why it's strictly a material property and not
> geometry-dependent...
>
> Greg Edlund
> Advisory Engineer, Critical Net Analysis
> IBM
> 3605 Hwy. 52 N, Dept. HDC
> Rochester, MN 55901
> gedlund@us.ibm.com
>
>
>
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