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Subject:	Re: routing/ placement grid
From:	Bates Karl <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Thu, 13 Sep 2001 11:57:37 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (59 lines)

Tom,
What CAD system are you using ?
I have been using the largest placement grid I can, (2.54mm, 1.27mm, .635mm)
starting with the largest and working my way down to fit the last components
in.   As far as routing grid is concerned, I set my design rule clearances
correctly and route gridless, and vias on 1.27mm or .635mm grid.    This
allows me to keep everything orderly and enough copper between vias for
pwr/gnd fills, and keeps a uniform test grid.
Karl

-----Original Message-----
From: Tom Richardson [mailto:[log in to unmask]]
Sent: Thursday, September 13, 2001 10:18 AM
To: [log in to unmask]
Subject: [DC] routing/ placement grid


Hello,

I have a board with 0.8 mm, 0.5 mm, 0.65 mm, 1.254 mm, and 2.54 mm pitch
components.
The question is what is the best placement grid/ routing grid?

Thank you.

Tom Richardson, CID
Spectracom Corporation
101 Despatch Drive
East Rochester, New York 14445
voice 716-381-4827
fax 716-586-6309
[log in to unmask]

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