in less than a day to achieve reasonable cycle times since the DRC will likely be run several times prior to design completion. With today's processing power, full-chip DRC's may run in much shorter times as quick as one hour depending on the chip complexity and size. Some example of DRC's in IC design include: Active to active spacing Well to well spacing Minimum channel length of the transistor Minimum metal width Metal to metal spacing Metal fill density (for processes using CMP) Poly density ESD and I/O rules Antenna effect Commercial Major products in the DRC area of EDA include: Altium Designer Advanced Design System Desktop DRC by PathWave Design (Keysight Technologies Previously Agilent's EEsof EDA division) Calibre by Mentor Graphics Diva, DRACULA, Assura, PVS and Pegasus by Cadence Design Systems Hercules and IC Validator by Synopsys Guardian by Silvaco HyperLynx DRC Free/Gold by Mentor Graphics PowerDRC -now SmartDRC by Silvaco SmartDRC by Silvaco Quartz by Magma Design Automation Free software Electric VLSI Design System KLayout Magic Alliance -- A Free VLSI/CAD System Opencircuitdesign software: Microwind -- An educational layout CAD system Opensource 130nm CMOS PDK by Google and SkyWater tech. Foundry References Electronic Design Automation For Integrated Circuits Handbook, by Lavagno, Martin, and Scheffer, A survey of the field, from which part of the above summary were derived, with permission. Electronic circuit verification Integrated circuits