A brief guide to the specifications,tolerances and design rules that are required when ordering photo-mask products through JD Photo-Tools (Manchester, England)
this is a very nice and good guide to photomask design, a good "starter for 10" for anyone getting her/his head around the more intricate bits - I liked it and am commending people to A have a look at the guide and B use your excellent services.
Regards
Mathis