[SI-LIST] Re: Splitting this power plane - And GND planes count
- From: steve weir <weirsi@xxxxxxxxxx>
- To: alan@xxxxxxxxxxxxxxxxx
- Date: Fri, 11 Mar 2005 23:00:34 -0800
Alan, maybe more ground layers, or maybe fewer powers. But as it stands it
is very suboptimal.
Regards,
Steve.
At 08:09 PM 3/11/2005 -0800, Alan Hilton-Nickel wrote:
>steve weir wrote:
>
> >1) Why three big power planes if they do not form cavities with logic
> >ground? If this is a DC problem then apply a DC solution.
> >
>And from the DC perspective, if 3 planes are needed on the supply side
>to provide sufficient current, then three ground planes would also be
>needed to complete the circuit.
>
>Nasty stackup indeed.
>
>Ivor, you need two more layers. May I suggest (depending on your signals
>of course):
>
>1. Component/signal
>2. Ground
>3. Power
>4. Signal
>5. Signal
>6. Power
>7. Ground
>8. Signal
>9. Signal
>10. Power
>11. Ground
>12. Component/Signal
>
>Alan
>
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