Cell Instance Finder

A mask designer may need to find the insertion coordinates in a GDSII file of a specific cell or (or multiple cells) or find out how many times a specific cell is inserted in the GDSII file.

Note: This is a separately licensed product and not included with the license for GDS2ASCII/ASCII2GDS.

The program, instance_finder64.exe. allows the user to export a text file containing all the insertion coordinates of the specified cell.

Command line arguments


instance_finder64.exe gdsii_file   output_file   top_structure   [options]

where:

top_structure                         may be auto selected with '='. Otherwise
                                      use the structure name.

output_file                           specifies log and default map file names

[options]

  -byname                             sort output by name (default)

  -bycoord                            sort output by coordinate (y dominant)

  -unique                             do not output duplicate instances

  -mapfile:filename                   specify alternate map file name 
                                      (default is derived from output_file)
                           
  -prec:N                             output coordinates with N decimals

  -units:Units                        one of 'um', 'mm', 'cm', 'mil', or 'inch'

  -searchlist:                        a comma separated list of names or regular expressions.
                                      

  -searchlist:@filename               filename is text file with list of cell names or
                                      regular expressions.




Example 1

In this example, we are looking for any cell name that starts with the string of characters PAD. We put the regular expression ^PAD.*$ into a file called list.txt and then instruct the program to read the list.txt file to get the cell name criteria.

list.txt

REGEXP
^PAD.*$

and here is the command line:

c:\wcad\gds2ascii\examples\instance_finder64.exe demo1.gds ifind_ex1 = "-searchlist:@list.txt"

Output

the output file is called ifind_ex1.map (from the command line argument for output file) and here are the contents:

Xum        Yum       10  Symbols
0.000000   0.000000      PAD4MILS
150.000000 0.000000      PAD4MILS
0.000000   150.000000    PAD4MILS
150.000000 150.000000    PAD4MILS
115.500000 61.500000     PADCONT
148.500000 67.500000     PADCONT
-1.500000  79.500000     PADCONT
196.500000 133.500000    PADCONT
-1.500000  156.000000    PADCONT
115.500000 177.000000    PADCONT

Example 2

This example is similar to the one before but it also includes additional options for controlling the units of the coordinates, the precision and sorting.

c:\wcad\gds2ascii\examples\instance_finder64.exe 
       demo1.gds ifind_ex2 = "-searchlist:@list.txt"  -units:mm  -prec:6  -byname

Output

Xmm        Ymm      10 Symbols
0.000000   0.000000    PAD4MILS
0.150000   0.000000    PAD4MILS
0.000000   0.150000    PAD4MILS
0.150000   0.150000    PAD4MILS
0.115500   0.061500    PADCONT
0.148500   0.067500    PADCONT
-0.001500  0.079500    PADCONT
0.196500   0.133500    PADCONT
-0.001500  0.156000    PADCONT
0.115500   0.177000    PADCONT


Example 3

This example is similar to the one before but it puts the regular expression on the command line instead of in a file.

c:\wcad\gds2ascii\examples\instance_finder64.exe 
             demo1.gds ifind_ex3 = "-searchlist:^.*$" -units:um -prec:3 -bycoord


Example 4

This example shows how user can specify output map file name using "-mapfile:filename" command line option.The regular expression ^.*$ selects all cell names in the GDSII file.

c:\wcad\gds2ascii\examples\instance_finder64.exe 
             demo1.gds ifind_ex4 = "-searchlist:^.*$" -units:um -prec:3 -bycoord -mapfile:map.map

Output

The output file is called map.map

Xum       Yum    26 Symbols
0.000     0.000     PAD4MILS
150.000   0.000     PAD4MILS
115.500   61.500    PADCONT
148.500   67.500    PADCONT
-1.500    79.500    PADCONT
124.500   97.500    SCNT
43.500    108.000   QE
43.500    108.000   TQE
103.500   108.000   PLUG2
118.500   108.000   PLUG2
142.500   108.000   PLUG2
157.500   108.000   PLUG2
100.500   127.500   PLUG2
115.500   127.500   PLUG2
145.500   127.500   PLUG2
160.500   127.500   PLUG2
196.500   133.500   PADCONT
124.500   135.000   QE
124.500   135.000   TQE
115.500   147.000   PLUG2
145.500   147.000   PLUG2
0.000     150.000   PAD4MILS
130.500   150.000   PLUG2
150.000   150.000   PAD4MILS
-1.500    156.000   PADCONT
115.500   177.000   PADCONT



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