# ring1.prs: creates ring of 2.5 micron around objects in layer 21
# and adds it to layer 1. Meant to create a ring around circular holes
# for proper inversion.  
# Uses layer 11 and empties it.
# Process file for GDS-II postprocessing tool
# R.C. Strijbos TU Eindhoven 05/11/00

group_a empty
group_a 21 false
destination 11
correctionfactor {2.5um}
makering

group_b empty
group_b 11 false
destination 11
b_subtract_a

group_a empty
group_a 11 false
destination 01
move_a
