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.