At a previous employer, I had a spreadsheet containing the area used by
every part they used, including manufacturing allowances and tolerances. I
would take the BOM and generate a density study that included an allowance
for signal and power traces, and minimum board size and probable layout time
based on technology (single punch, single drill, or double sided)
Needless to say, the component area data took time to enter, but I would add
new parts as each layout came in for quote. It got to the point that I
could give a pretty close estimate in a fifteen minutes or so. This
obviously would not be a viable tool in a job shoppe, but it worked well for
a single manufacturer.
--
George Patrick
Tektronix, Inc.
Central Engineering, PCB Design Group
P.O. Box 500, M/S 39-512
Beaverton, OR 97077-0001
Phone: 503-627-5272 Fax: 503-627-5587
http://www.tektronix.com http://www.pcb-designer.com
It's _my_ opinion, not Tektronix'
-----Original Message-----
From: RD Munger [mailto:[log in to unmask]]
Sent: Wednesday, December 04, 2002 8:27 AM
To: [log in to unmask]
Subject: [DC] Circuit Density Guidelines
Hello all.
Does anyone have a simple way to calculate what size PCB is needed for a
particular schematic?
Thank you.
Dan Munger
Fermi National Accelerator Laboratory
Batavia, IL
[log in to unmask]
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