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PostScript is the industry standard for sending documents to high-resolution printers. LinkCAD's PostScript compatible export has been optimized for producing low-cost masks using high-resolution laser printers. The PostScript export can also be used to print your layout for documentation purposes.
LinkCAD relies on two external tools to import PostScript: 
pstoedit
and Ghostscript.
These tools are distributed under the GNU General Public License.
We distribute a setup program
that installs both tools, but you can use your own versions of these tools,
as long as they exhibit the same command line interface (technical
details).
What follows is a discussion of the precision of PostScript generated masks.
LinkCAD's database resolution is always 0.001 microns, or 25'400'000 dpi (dots per inch). There are, however, several factors that prevent you from achieving such a high resolution for your PostScript generated masks:
PostScript calculates in 72 dpi units. To convert from nanometers to 1/72 inches, LinkCAD instructs the PostScript processor to multiply the units by 2.83464566929E-6. The calculation is done with very high precision and the actual limiting factor is the printer's resolution. If the printer has a resolution of 4800 dpi, the minimum feature size and the maximum error would be approximately 5.29 microns.
Be careful, however, if you are working with repeated structures (comb structures) such as alignment masks. Because 1/4800 is not an integer multiple of 0.001 microns, you get an interference pattern, which offsets your structure by 5.29 microns at every wavelength, which in this example is roughly 84 mm long.