To: <psharkey@xxxxxxxxxxx>,"Si-List@Freelists. Org" <si-list@xxxxxxxxxxxxx>
Date: Fri, 1 Feb 2002 08:43:39 -0600
I would be more concerned with splitting the ground plane than what =
layers to use. Splitting a ground plane can cause return current loop =
problems. It is best not to cut up the ground planes if all possible.
Doug Hopperstad
Qlogic
6321 Bury Drive
Eden Prairie, MN
Phone: (952) 932-4007
Fax: (952) 932-4037
doug.hopperstad@xxxxxxxxxx
-----Original Message-----
From: Pat Sharkey [mailto:psharkey@xxxxxxxxxxx]
Sent: Friday, February 01, 2002 8:10 AM
To: Si-List@Freelists. Org
Subject: [SI-LIST] Split Plane Routing=20
Hello all,
Given the following stackup with planes split in different areas -=20
1 - S1
2 - GND (SPLIT 1)
3 - S2
4 - GND(SPLIT 2)
5 - POWER(SPLIT 3)
6 - S3
7 - GND (SPLIT 4)
8 - S4.
For a signal which originates on layer 8, should the signal only be
routed on layers 6 & 8? Or, can layers 1 and 3 also be used to cross
a plane split on layer 7, assuming layers 2 and 4 are not split in the=20
same place (z axis)?
Thanks in advance,
Pat
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