Printed circuit board manufacture request
=========================================

Name			Ronja Twister version 20040807
Constr. class		4
Shape			Rectangle, middle of the outline that is present in
			all layers
Width                   4080 mil (103.632 mm)
Height                  3280 mil (83.312 mm)
Layer file format	Gerber RS 274X
Drill data format	Excellon
Drill data meaning	Diameter of resulting hole (not diameter of the drill)
Rounding hole           Round toward bigger diameter
        diameters
Layers			Two-layer through-plated, 2x soldermask, 1x silkscreen
Material                FR4
Material thickness      1.5mm
Copper thickness        18um
Chirality		All layers are presented as if viewed from component
			side.
Copper polarity		Positive. Dark places in file mean copper.
Soldermask polarity	Negative for Gerber RS 274X (clear spaces in file mean
			mask matter), positive for PostScript(dark places in
			file mean mask matter.)
Silkscreen polarity	Positive. Dark places in file mean paint
Through-plating		All holes are through-plated
Gold-plating		None
Surface treatment	Hot Air Levelling
Edge treatment		Shearing
Testing			Optical

Note: Gerber RS274X format means "Gerber RS-274X Format", defined in the year
1998 by company Barco Graphics N.V., Gent, Belgium (Barco ETS, Tramstraat 69,
B-9052 Gent, etsinfo@barco.com), see
http://nexp.cs.pdx.edu/twiki-gerber/pub/Gerber/GerberFiles/rs274xrevd_e.pdf

File meaning
============

twister.pcb.output_back.gbr              solder side - copper
twister.pcb.output_backmask.gbr          solder side - soldermask
twister.pcb.output_fab.gbr               drilling checkplan
twister.pcb.output_front.gbr             component side - copper
twister.pcb.output_frontmask.gbr         component side - soldermask
twister.pcb.output_frontsilk.gbr         component side - silkscreen
twister.pcb.output_plated-drill.cnc      drill data - throughplated holes

Views
-----
Views are in PostScript format and have only informal meaning to check
that the data have been interpreted correctly. They are not intended for
being exposed on a film.

twister.pcb.output_back.ps               solder side - copper. Differs from
                                           Gerber - holes are shown here!
twister.pcb.output_backmask.ps           solder side - soldermask. Has
                                           opposite polarity to Gerber!
twister.pcb.output_fab.ps                drilling checkplan
twister.pcb.output_front.ps              component side - copper. Differs from
                                           Gerber - holes are shown here!
twister.pcb.output_frontmask.ps          component side - soldermask. Has
                                           opposite polarity to Gerber!
twister.pcb.output_frontsilk.ps          component side - silkscreen