MAGIC Magic Mailing List
 
 
From: Philippe Pouliquen (philippe AT alpha DOT ece.jhu.edu)
Date: Sun Mar 02 2003 - 15:51:27 EST

  • Next message: cfk: "Re: cursors & grids take 2" 

    Hi Charles,

> I am currently trying to understand why when I place a cell such as the
> simplest one INVF100.mag and add paint for just the Vdd or GND
> connection on metal1 using the box (so its 8 units wide), I get three
> errors pointing me at P-Well spacing of at least 9 and width of P-Well
> of at least 10. Thats with a GND metal1 paint, I get a corresponding set
> of errors with a Vdd metal1 paint for N-Well on the top of the cell.

If you are using the middle button on the mouse to paint, then the most
likely explanation is that the metal1 that you are clicking on also has
nwell (or pwell) under it.  The result is that you end up painting both
metal1 and nwell (or pwell).

Then, since the box you are painting is smaller than 10 units you get a
width error on the nwell (pwell), and probably you are just a few units
away from the other nwell in the cell, so you get the separation error as
well.

If this is the case, the solution is to either not paint the nwell (or
pwell), or to make the painted nwell large enough and join it to the
existing well.


Philippe Pouliquen
The Johns Hopkins University

    •  
     
    Questions? Contact Rajit Manohar     		cornell logo