On May 4, 2009, at 1:55 AM, gene glick wrote: > PCBfabexpress states on their faq that they prefer to have inner > gerber > layers in negative format. Is this possible with PCB? > This made sense back in the days where they would apply a positive or negative photo resist and expose it with the defined apertures from the gerbers. Negative photo resists have higher line resolution, allowing for finer features with cheaper resist.
Not having to draw lines on the mask to assemble planes. Now that computers probably translate everything to negative layers and rasterize the exposure onto the resist, it hardly should matter. > > gene > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
