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Oh... that's one helpful suggestion. I didn't think of that before. they
all suggest me to edit the tech file, which I have no idea. 

I'll try that. thanks!


On Mon, 29 Oct 2001, Philippe O. Pouliquen wrote:

> 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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