Path: utzoo!news-server.csri.toronto.edu!rutgers!rochester!cornell!uw-beaver!uw-june!june.cs.washington.edu!jscott
From: jscott@june.cs.washington.edu (J Scott Penberthy)
Newsgroups: comp.lsi.cad
Subject: "Intelligent" extractors for CIF?
Message-ID: <15442@june.cs.washington.edu>
Date: 13 Mar 91 18:58:52 GMT
Sender: jscott@cs.washington.edu
Reply-To: jscott@june.cs.washington.edu (J Scott Penberthy)
Distribution: usa
Organization: U of Washington, Computer Science, Seattle
Lines: 14

We will be using a 2-metal CMOS process to fab our layout.   We're drawing
the layout in MAGIC which can produce CIF files.

Does anyone know of a CIF extractor that correctly deals with the varying
capacitance of routing lines?  Our current extractor only uses a single
value for metal1, metal2, or poly capacitance.  However, these values can
vary greatly depending on what lies beneath the given element.  For
example, metal2 over metal1 has nearly twice the capacitance of metal2 over
substrate.

Any pointers to literature, products, etc. would be appreciated. 

Thanks,
Scott