Greg,
There are several CAD systems which have added the RS274-X output format 
such as Cadence/Allegro and P-CAD.  This format helps tremendously not only 
in eliminating errors with aperture entry but also in improving file 
efficiency especially when describing split ground planes.  If your PWB 
suppliers can handle this format, you should consider sending them a test 
design file to verify for yourself the benefits of using this format.  For 
those not familiar with the format, there are several sources of 
information, one being the Gerber Format Reference Manual.

George Murray
Gerber Systems
(860) 648-8117
[log in to unmask]

 ----------
From: TechNet-request
To: technet
Subject: DES- Gerber formats?
Date: Thursday, October 31, 1996 10:08AM

                      Subject:                              Time:  9:04 AM
  OFFICE MEMO         DES: Gerber formats?                  Date:  =
10/31/96

Our CAD suppliers currently provide us with Gerber files in RS274-D =
format, but several of our PWB suppliers have asked us to consider getting =
files in RS274-X format to take advantage of the embedded aperture list.

Has anyone seen any problems or difficulties with the newer RS274-X format =
which we should be aware of?

Thanks,
Greg Bartlett
Mercury Computer Systems
Chelmsford, MA
[log in to unmask]

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