Layers 2 thru 4 were poured.
Except for the split on layer 2, layer 3 & 4 could have been replaced with
plane layers. I personally like to pour my power planes.
_____________
Brian Guralnick
----- Original Message -----
From: "Dennis Saputelli" <[EMAIL PROTECTED]>
To: "Multiple recipients of list proteledausers"
<[EMAIL PROTECTED]>
Sent: Tuesday, February 20, 2001 3:18 PM
Subject: Re: [PROTEL EDA USERS]: Best layer arrangement
> do you mean that the midlayer2-4 were all routing layers, not plane
> layers?
> poured planes?
>
> Dennis Saputelli
>
> Brian Guralnick wrote:
> >
> > Hi Georg,
> >
> > Here is my successful 6 layer 200Mhz design with high speed digital on
top &
> > bottom, and analog on top. 1.5 ns typical rise & fall times, >75db
> > isolation from digital to analog section.
> >
> > Top -> High speed digital & Analog
> > MidLayer1 -> Mid speed digital
> > MidLayer2 -> Split VCCINT 1.8v & AGND
> > MidLayer3 -> DGND
> > MidLayer4 -> VCCIO 3.3v
> > Bottom -> High speed digital
> >
> > _____________
> > Brian Guralnick
> >
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