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Import some particular shape in to Cadence layout L

engine2011

 Hi everyone,

 I want to use standard technology to fabricate a device which is basically a circle shape realized with the toppest level metal layer. Because the process resolution is 0.01um, the smooth brim of circle is not acceptable and will introduce some class a DRC errors. 

 Now I am making the brim of circle replaced by 90 degree polygon to solve these errors. The problem is, if I want to make it a good approximation to a circle, the polygon will be very complex. I can use Matlab to generate this shape without much effort, however, it will be very complex to draw it manually in Cadence. Does cadence have some function to import the shape data from Matlab?

 Thanks!

EF

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  • Andrew Beckett

    The problem is that you've changed the code so that it is now not syntactically correct! You've changed the name of the argument to that function to be a literal string - and that's not allowed. Nor is it necessary. The whole point of defining a function with an argument is to allow you to call that function with whatever value you like - you should not have to change the code for each pathname you want to use.

    So, leave the code as it was, and then do:

    abPixMapReadFile("/h/efu01/ibm180/final.XPM")

    Or even just call:

    abXpmToLayout()

    and then use the form to navigate to the file you wish to import. Calling abPixMapReadFile alone will not produce the image - it just parses the pixmap and stores it in some data structures, ready to be drawn later. The function that does the drawing is abPixMapDrawLayout() - but you'll need to see how the various callbacks work to see how the data structures are assembled so that they are ready to be called by abPixMapDrawLayout(). Using the form saves you that bother - it will read the file and then pop up another form to get you to choose which layers you want to be used for which colours in the original pixmap file.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    The problem is that you've changed the code so that it is now not syntactically correct! You've changed the name of the argument to that function to be a literal string - and that's not allowed. Nor is it necessary. The whole point of defining a function with an argument is to allow you to call that function with whatever value you like - you should not have to change the code for each pathname you want to use.

    So, leave the code as it was, and then do:

    abPixMapReadFile("/h/efu01/ibm180/final.XPM")

    Or even just call:

    abXpmToLayout()

    and then use the form to navigate to the file you wish to import. Calling abPixMapReadFile alone will not produce the image - it just parses the pixmap and stores it in some data structures, ready to be drawn later. The function that does the drawing is abPixMapDrawLayout() - but you'll need to see how the various callbacks work to see how the data structures are assembled so that they are ready to be called by abPixMapDrawLayout(). Using the form saves you that bother - it will read the file and then pop up another form to get you to choose which layers you want to be used for which colours in the original pixmap file.

    Regards,

    Andrew.

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