Xref: utzoo comp.lsi:463 sci.electronics:2942
Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!jwg
From: jwg@faline.bellcore.com (Joel W. Gannett)
Newsgroups: comp.lsi,sci.electronics
Subject: Re:  (In)correct Parasitic Extraction
Keywords: this problem should not exist
Message-ID: <1876@faline.bellcore.com>
Date: 11 May 88 17:09:13 GMT
Organization: Bell Communications Research
Lines: 25


In article <2151@obiwan.mips.COM> mark@mips.COM (Mark G. Johnson) writes:
>
>Why?  We need to distinguish between a poly edge and a metal-2 edge,
>but the L.P.E. software can't tell them apart.
>

Bellcore's Rink system, an in-house layout analysis system that I have
worked on, handles Mark Johnson's example case correctly.  Rink includes
an enhanced version of the Goalie layout analysis system, which is also
proprietary and was originally developed at Bell Labs.  The Goalie program
for extracting areas and perimeters, called pax, classifies perimeter edges
according to "what's on the other side of the boundary," so it correctly
differentiates between the two examples given by Mark Johnson.

Although Rink and Goalie are proprietary packages, the ideas embodied
in Goalie have been well-publicized in various technical papers (e.g., [1]).
I have little familiarity with vendor packages, but it is hard for
me to believe that any commercial package for parasitic capacitance
extraction could be offered as a serious tool if it had less functionality
than that offered by the Goalie pax program.

[1]  T. G. Szymanski and C. J. Van Wyk, "Goalie: A Space Efficient
     System for VLSI Artwork Analysis," IEEE Design and Test of Computers,
     vol. 2, no.3 (June 1985), pp. 64-72.