[PCB_FORUM] Re: Planes- pos/neg- dynamic/static

Hi Mike,

There are a few items to consider:
THE CONS
1. (Positive Planes) Going with positive planes will increase the size of
your database.
2. (Negative Planes) You will need to create flash symbols in order to
create Gerber's as 274X as negative planes.

That's it, that's all!

Deac



Deac Descoteaux
Director New Business Development
PalPilot East Coast
71 Spitbrook Road, Suite #307
Nashua, NH 03060
Tel: (603)888-3400
Fax: (603)888-3500
Cell: (603)557-7568
Car Phone:(603)540-4173
email:deacd@xxxxxxxxxxxx
www.palpilot.com

-----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 9:14 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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