Stats

  • Locked Locked
  • Replies 5
  • Subscribers 125
  • Views 20508
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

How to convert a technology file to a layer mapping file

SUEE

Hi all,

From one foundry I have one technology file with a name called "techfile"

How could I get a layer mapping file from this fiile?

 

I want to do so is because:

(1) I have a gds file from another souce, that has some layers (number) not defined in said "techfile". Let's call those special layers "LayersS". I do not have a tech file from that source. In addition to those

(2) I want to use some layers we generally not used in "techfile", eg TSV and SOI, to show the those "LayerS" in Cadence

(3) So I need a layer mapping file in "stream in"/'stream out" to translate those "LayerS" to TSV layer. 

(4) This is not only stream in but also stream out, because eventually I will tapeout a chip containing those "LayerS" with correct layer numbers.

 

Could someone tech me how to do it ?  Or how to solve my problem in another way?

Many thanks !! 

 

  • Complement to (1) Besides those "LayerS", all other layers are the same.

    Those "LayersS" are specially layers for special novel device still under development, provided by that "another source".

    Eventally I will tapeout a gds files to that "another source" with those "LayerS" 

    Thank you !!! 

  • Assuming you're talking about IC61 (you didn't say) then there is no stream layer mapping info in the tech file - it's a separate file that lives in the technology library usually. In IC5141 it was possible to put stream mapping info in the tech file, but I don't think there was anything to convert this into an external layer map file.

    However the format is very simple and well documented, so writing it by hand should not be hard!

    And if it has to deal with layers not in the tech file anyway, I can't see how you would expect to be able to generate it...

  • Andrew, thanks to your fast response. Yes, I am using IC61.

    (1) You mentioned there is a separate file. What is usually the name of it?

    (2) Writing a layer mapping file is not too difficult, I know, but I prefer not to do it from zero manually because I am afraid that I will miss something so that the final streamed out gds lacks some layers or does something wrong

    (3) My original plan is.

        >> For instance if the special layer number is 220/8 (not exist in the tech file). I want to stream in it to layer TSV/0 (known layer).

        >> With this TSV/0 layer in Cadence Virtuoso I can then add/edit some shapes that emulate the nonexisting 220/8 layer

        >> Finally after the stream out, in the gds file I would have those shapes with layer number 220/8

        Does it make sense?

     

    Thanks a lot !! 

  • If the technology library is called, say, gpdk045, then the file would be inside the library and called gpdk045.layermap

    Andrew
  • Wonderful. I see it. Best regards !

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.