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Date: | Fri, 07 Mar 1997 11:50:30 -0500 |
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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
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