Jerry Cupples wrote: > -snip- -snip- -snip- -snip- > Our Company has a practice of ordering sets of 7 mil silver Mylar film for > each new design, to check the actual layer images and to archive. We ... > > Of course, said film is not used for fabrication these days, but this ... > > require correcting the CAD (Allegro) files, re-sending the Gerber to the > plotting service, and waiting for the checkfilm to "sign off" the ... > to say "B" sized checkfilm with enough resolution for close inspection, but > not necessarily with the resolution and accuracy required for working film. > > The film would only need to be good enough to verify the clearances and > dimensions, and accurate layer-layer for checking our stackups. > > If anyone has a suggestion as to the software and hardware one could use > for this purpose, please post here or email. I really have no idea... Hi, Jerry - I believe in simple answers, and for this case I'd suggest using a B-sized postscript printer, of perhaps 400 dpi resolution, and print on acetate. For any checking more accurate than this, you should really be using CAM-type review and/or drc tools. Do this from the Gerber data that you're sending to fabrication, rather than plotting them seperately. Contact me offline if you need help accomplishing this from Allegro. Regards, -- Jeff Seeger Applied CAD Knowledge Inc Chief Technical Officer Tyngsboro, MA 01879 [log in to unmask] 508 649 9800 *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To subscribe/unsubscribe send a message <to: [log in to unmask]> * * with <subject: subscribe/unsubscribe> and no text in the body. * *************************************************************************** * If you are having a problem with the IPC TechNet forum please contact * * Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask] * ***************************************************************************