Ronja Twister 2 solderpad
ronja-twister-2 / Gerber / README.txt
Printed circuit board manufacture request
=========================================
Name Ronja Twister2 revision 20060405
Construction class 4
Shape Rectangle with beveled corners, middle of the outline
drawn in twister2.pcb.output_fab.gbr
Width 3162.00 mil (80.315 mm)
Height 5416.00 mil (137.541 mm)
Layer file format Gerber RS 274X
Drill data format Excellon
Drill data meaning Final diameter of hole
Rounding hole Round toward bigger diameter
diameters
Layers Two-layer through-plated, 2x soldermask, 2x silkscreen
Material FR4
Material thickness 1.2mm
Copper thickness of
basic material 35um or more
Chirality All layers are presented as if viewed from one side
(component side).
Copper polarity Positive. Dark places in file mean copper.
Soldermask polarity Negative. Clear spaces 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 Milling
Testing Optical if at least 3 pieces are manufactured
Note: Gerber RS274 format means "Gerber RS-274X Format", defined in the
year1998 by the 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
============
twister2.pcb.output_back.gbr Solder side - copper
twister2.pcb.output_backmask.gbr Solder side - soldermask
twister2.pcb.output_backsilk.gbr Solder side - silkscreen
twister2.pcb.output_fab.gbr Drilling checkplan
twister2.pcb.output_front.gbr Component side - copper
twister2.pcb.output_frontmask.gbr Component side - soldermask
twister2.pcb.output_frontsilk.gbr Component side - silkscreen
twister2.pcb.output_plated-drill.cnc Drill data - throughplated holes
Previews
--------
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. They may be not up to scale.
twister2.pcb.output_fab.ps Drilling checkplan
twister2.pcb.output_back.ps Solder side - copper. Differs from
Gerber - holes are shown here!
twister2.pcb.output_backmask.ps Solder side - soldermask. Opposed
polarity to Gerber!
twister2.pcb.output_backsilk.ps Solder side - silkscreen
twister2.pcb.output_front.ps Component side - copper. Differs
from Gerber - holes are shown
here!
twister2.pcb.output_frontmask.ps Component side - soldermask. Opposed
polarity to Gerber!
twister2.pcb.output_frontsilk.ps Component side - silkscreen