From: Huie, JohnX (email@example.com)
Date: Thu Oct 21 1999 - 07:43:14 PDT
Check Automata in Virginia regarding High Er without FR4 material.
From: Craig Twardy [mailto:firstname.lastname@example.org]
Sent: Thursday, October 21, 1999 6:52 AM
Subject: Re: [SI-LIST] : Thin Power Plane Dielectrics
Ray Anderson wrote:
> email@example.com comments:
> > Does this mean ,for a given PCB size, I can increase the number of
"points of consumption"
> > by a factor of 10 and maintain the same capacitance per "point of
> Yeah, I think so, if I understand your question...
that's it, thanks.
> Yes it will. This can also introduce problems in that you will
> end up having the board resonate at lower frequencies that it would have
with lower Er
> dielectrics. This can cause EMI concerns at lower frequencies
> than you might traditonally expect. Also, the board resonance effects
> will begin to move down towards the frequencies that one usually thinks
> of as being primarily of SI concern. This can cause all manner of
> Actually it is an option today with some vendors offering
> technologies in lieu of thin FR4. Half mil (or less) is in the realm
> of doability.
Can you provide vendor and/or product names?
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