[PCB_FORUM] Re: Planes- pos/neg- dynamic/static
- From: "Gerry Meier" <gerry.meier@xxxxxxxxxxxxxx>
- To: <icu-pcb-forum@xxxxxxxxxxxxx>
- Date: Thu, 17 May 2007 06:20:11 -0700
Mike,
I generally use Negative dynamic planes. The down side is these planes
will only use the ant-pad or as you stated a route keep out for voids.
So if you have an area of the board that require larger clearances you
may have to either add route keep outs or use customized pad stacks with
larger anti-pads specified in that area.
Gerry
-----Original Message-----
From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of
gnieski_mike@xxxxxxx
Sent: Thursday, May 17, 2007 8:14 AM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Planes- pos/neg- dynamic/static
Looking for opinions on this and to see how others are doing
these.
Our CAD group has gotten into discussions as to whether or not
we should be
doing solid power/ground planes as positives. As a long time
Allegro user I've
been accustomed to doing solid planes as negatives and static,
though lately
Ive been making these planes negative/dynamic to take advantage
of voiding of
route keepouts on certain layers.
So could I find out if anyone is going with databases that are
all positives as far
as layers are concerned? And any comments Pro or Con as to
using this method.
thanks,
Mike Gnieski
EMC2 Corporation
176 South Street
Hopkinton, MA 01748
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