1 Reply Latest reply on Jun 24, 2010 11:58 AM by chris_balcom

    layers with same number ????

    eng.marwa_ahmed

      hi Smile
      i use calibre DESIGNrev to open a layout generated by candece first encounter .
      in cadence first encounter : i use a map file when streaming out a gds2 layout.

       

      when i open in calibre i see those layers , example :
      31
      31.1
      33
      33.1
      etc....

       

      what is the difference between layer number 31 and layer 31.1 ??????

       

      how to write the layer properties file in this case ?
      and how to write the rules in this case ?
      in other words , layer metal1 is no 31
      so whats layer 31.1 ? is it metal1 also ????

       

      thx for explaining and helping me

        • 1. Re: layers with same number ????
          chris_balcom

          I can explain how Calibre DRC will handle it but someone else should explain the layer properties file ( I don't use it often enough myself)

           

          For Calibre the default behavior is to use ALL the datatypes on a layer. Another way to think of that is that Calibre "ignores" datatype numbers by default and only focuses on layer numbers regardless of datatype.

           

          So it might be interesting to see in DESIGNrev why do you have some things on datatype 1 ?

           

          If you're certain that all the data on layer 31 is metal regardless of datatype then you can simply use something like this for the metal layer in the SVRF rulefile:

           

          LAYER MET1 31

           

          Now if you decide that the geometry on layer 31 with datatype 1 isn't really good metal after all, then you would use LAYER MAP within the SVRF rulefile to "separate it away" from the rest of the data on layer 31 (that probably has datatype 0 by default). There will be more details in the SVRF manual for "LAYER MAP"