Subject: | |
From: | |
Reply To: | (Designers Council Forum) |
Date: | Thu, 7 Feb 2008 10:59:27 -0500 |
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To keep noise down on a board you want GND poured. So even though you
have a Signal , Gnd, Power, Signal which is the way to stack this, pour
GND with both signals..... Signal (GND) , GND, Power, Signal (GND). This
will help with your emissions test that will be run on the design.
Joe J.
-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Josh
Culpepper
Sent: Tuesday, January 15, 2008 4:32 PM
To: [log in to unmask]
Subject: [DC] Extra Planes
I am currently doing a 4 layer board and the stack is: (from top to
bottom) Signal, GND, Power, Signal. We are trying to decide which layout
is better. The first scenario is to leave a plane off of the signal
layers. The second is put a plane on the signal layers opposite of the
plane it references. For example on the first signal layer I would
pour a power plane which references the GND and the opposite for the
other pair. I was under the impression that you would want more coupling
between your planes which would suggest the 2nd scenario would be more
correct. Is my thinking on this right or am I way off base on this.
Josh Culpepper CID+
Engineer 1
Clean Earth Technologies, LLC
13378 Lakefront Drive
Earth City, MO 63045
314-222-4640 ext. 126
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