Plotting hints to obtain 40:1 scale factor
There is a point when the designs in Ledit need to be printed out at
the desired scale factor.
Tanner says to proceed to scale as follows:
(1) Go to PAGE SETUP > set SCALING to FIXED
(2) Go to FILE PRINT
There they ask for PIXELS(printer unit increments) per INTERNAL UNIT (L-Edit unit increments).
1 PIXEL = 1 postscript point = 1/72inch = 352.7um
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Plots can be scaled by the ratio between the printer and L-Edit units.
Example:
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If a circuit design has internal unit = 1um.
Printout is 1:1 if 1 PIXEL = 353 INTERNAL UNITS
Printout is 40:1 if 40 PIXEL = 353 INTERNAL UNITS (this is what we need)
Example:
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EE650 has internal unit = 20um (our minimum feature size)
printout is 1:1 if 1 PIXEL = 18 INTERNAL UNITS
printout is 40:1 if 40 PIXEL = 18 INTERNAL UNITS
courtesy of Mr. Thomas Adam