We do all our designs in metric. Bobby Mosley CID 503 685-3209 360 901-1573 bobby.mosley@xxxxxxxxxxxxxxxx <mailto:bobby.mosley@xxxxxxxxxxxxxxxx> -----Original Message----- From: Gary MacIndoe [mailto:gary.macindoe@xxxxxxx] Sent: Friday, April 01, 2005 1:45 PM To: Allegro Forum Subject: [PCB_FORUM] Metric database Ok, now for something completely different... Has anyone set up a design in metric, and sent it out to Fab? Some questions: - Did you set the "User Units" to Millimeter or Microns? We use Millimeter - What did you set the "Accuracy" to? (maybe 3 for Millimeter, 0 for Microns?) 3 places on most designs, for designs with dense BGA's we use 4 (not sure why we just do) - How about the Artwork Parameters, "Output units" can only be set to Inches or Millimeters? 4 places in Millimeters. - Anything else about working and creating output in a Metric database I should know about? Nothing comes to mind, it does take a while to wrap your brain around it. I have started with the database set up in Microns in order to have whole number trace widths (75 and 100). If I switch to a Millimeter database, the trace widths become .075 and .100 (I guess I could handle the less than whole numbers). Anybody have any suggestions about this? Thanks for any help! Gary E. MacIndoe PCB Design Engineer Advanced Micro Devices, Inc. Longmont, Colorado