[SI-LIST] Re: 12 Layer stack

For 12 layers I wouldn't use either.  I would use:  S/P/G/S/S/P/G/S/S/G/P/S

Steve
sunil bharadwaz wrote:
> Hi ,
>
>
>
> I have following two stack up's
>
>
>
> Stack 'A'
>
>
>
> 1)Signal
>
> 2)PWR
>
> 3)GND
>
> 4)Signal
>
> 5)PWR
>
> 6)Signal
>
> 7)Signal
>
> 8)Gnd
>
> 9)Signal
>
> 10)PWR
>
> 11)GND
>
> 12)Signal
>
>
>
> Stack 'B'
>
>
>
> 1)Signal
>
> 2)GND
>
> 3)Signal
>
> 4)Signal
>
> 5)Ground
>
> 6)Power
>
> 7)Power
>
> 8)GND
>
> 9)Signal
>
> 10)Signal
>
> 11)PWR
>
> 12)Signal
>
>
>
> Intent is to use one of these stacks for an FPGA based high speed Design (Max
> 133 Mhz).
>
> Can i know which one is preferable.
>
>
>
>
>
> regards
>
> Sunil.B
>
>
>
>
>       
>
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