From: Larry Smith (email@example.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...
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> Subject: RE: [SI-LIST] : Upper limit of interplane capacitance
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> Larry and Erik,
> [Erik Daniel wrote]
> > I agree with most of your comments on power plane capacitance, but I have
> > disagree with one point -- dielectric loss does NOT decrease with
> > thickness of the dielectric -- dielectric loss is independent of the
> > dielectric thickness in particular, and all geometrical concerns in
> > (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
> Greg Edlund
> Advisory Engineer, Critical Net Analysis
> 3605 Hwy. 52 N, Dept. HDC
> Rochester, MN 55901
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