[PCB_FORUM] Re: Planes be POSITIVE or NEGATIVE

I'm surprised to not see any feedback on this at all! My take is this

External layers or any layer that's mixed wiring/plane you need to use
positive shapes. Dynamic is best as you don't have to update each time
you change something in that area. 

Inner layers that are fully plane (may be multiple planes, just no
traces) are best done with negative planes. Allegro database and output
data files are smaller.

 

From: icu-pcb-forum-bounce@xxxxxxxxxxxxx
[mailto:icu-pcb-forum-bounce@xxxxxxxxxxxxx] On Behalf Of Zafar Bhatti
Sent: Thursday, July 24, 2008 6:19 PM
To: icu-pcb-forum@xxxxxxxxxxxxx
Subject: [PCB_FORUM] Planes be POSITIVE or NEGATIVE

 

Hi All,

 

What is the preferred way to make planes, positive or negative, dynamic
or static. Any thoughts, insights would be deeply appreciated.

Any pros / cons for both cases?

 

Regards,

 

Zafar Bhatti

Design Engineer

Whizz Systems Inc.

Office:(408) 980-0400 Ext. 112

Cell:(408) 569-0517

zbhatti@xxxxxxxxxxxxxxxx <mailto:zbhatti@xxxxxxxxxxxxxxxx>

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