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From: Philippe O. Pouliquen (philippe AT alpha DOT ece.jhu.edu)
Date: Mon Oct 29 2001 - 09:47:58 EST

  • Next message: Eric L T Tan: "Re: Layout question" 

    Hi Eric,

I have a quick and dirty solution to your problem:

>   I want to draw Fowler-Nordheim tunneling cahnnel
> in magic. According to Chris Diorio's paper he uses
> n+ diffusion in n-well, thus creating a thin-OX under
> poly. But whenever I want to draw poly over nsd
> (n-substrate-ndiff), the nsd yields and no active
> (CAA) region will be under the poly. I wonder how
> do you overcome this problem? The cif reads,

The problem is that the normal techfile doesn't define a tile type for
poly over substrate-diffusion.  The quick and dirty solution is to
place the poly in a separate subcell from the substrate-diffusion.
Magic will complain about design rule violations (it is a design rule
violation after all!) but will generate correct CIF/GDS.

I have successful used this method in the past...

Philippe Pouliquen
The Johns Hopkins University

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