Hope I will be able to know the answers of these questions after 6 months (in case they have not dealt with in the current scope of lectures and subject coverage till now ).
And in case if I have missed something then can someone please answer and discuss them??
- How is Layout different from Placement and Route?
- What is the difference between Synopsys Astro and Cadence Virtuoso-do they offer layout or are just placement and routing tools?)Comparing them with Magic and LASI) !
- What is the intermediate map/snapshot/diagram- which we can use and create a complete chip out of ? For example after seeing the Chip and reverse engineering the same- what is that something which I can use to create my own chip in the foundry? Reference- Chinese Mobile chips. They do the same-as they bypass the flow for design entry/verification/simulation/floor planning etc and release the chip within a few hrs of seeing the original chip(say famous case of duplicating iPhone/Nokia in the Chinese markets)
- Are Stick Diagrams passed to the Foundry or else what is the base unit that is given to Foundry as an input to be manufactured as a chip.
- Giving below a collection all possibly available Layout Tools(Categorized as Cheap, Expensive and Open Source)
|Open source software||Description||Web site|
|toped||Micron based layout editor with extensive scripting capabilities. Under active development and part of Fedora Electronic Lab.||http://www.toped.org.uk|
|microwind3||Lambda based layout editor especially adapted for interactive design with Spice.
This used to be completely free, but now only a Lite version is.
|magic||Lambda based layout editor with good options for writing CIF and/or GDS files. Supports scripting. Large user base. Part of
Fedora Electronic Lab. Used for extraction and CIF/GDS creation by the pharosc libraries
|lasi||LASI stands for LAyout Software for Individuals. It is designed to run on Windows, though it also runs on Linux under Crossover Office.
Actively used software with frequent updates.
|kic||Part of open source packages released by Whiteley Research.||http://wrcad.com/freestuff.html|
|graal||Lambda based layout editor allowing conversion to CIF and GDS with appropriate technology files. Dreal is the companion software to view CIF and GDS. Part of a tool set from Alliance which is probably the best open-source software for IC design. Comes with own standard cell library. Part of
Fedora Electronic Lab. The pharosc standard cells are drawn with graal.
|electric||Comprehensive set of software programs designed around the concept of silicon compilation. Version 6 crashed a lot, and stored all design data in a single file which exposed one to the risk of file corruption and loss of all data (I speak from experience).
New version written in Java. Extensive documentation.
|dreal||Simple layout editor which uses CIF or GDS as its native format. Companion software is Graal.||http://www-asim.lip6.fr/recherche/alliance|
|xic||Whiteley Research Inc. Layout editor with linked Spice simulator. List price is $1195.||http://www.wrcad.com/xic.html|
|slam-edit||Stabie-Soft Inc. Unix/Linux based layout editor. It seems a licence cannot be purchsed, only leased for one year periods (bad if the company folds). List price on web site is $2,000 per year.||http://www.stabie-soft.com/sledit.html|
|ledit||Tanner Research Inc. Windows only layout editor popular with mixed signal designers. Ledit sed to cost $1,000, but this price could not be verified (which is surprising since low price is a key selling point of the software).||http://www.tanner.com/EDA/product/Tools_PhysicalLayout.html|
|layedpro||Mycad Inc. Windows only layout editor designed in Korea but supported for English language users from California. No new product since 2005 on US site, but Korean site seems active. No price could be confirmed.||http://www.mycad.com/02pro/01.html
|layed||Catena Software GmbH. Demo versions for Linux and Windows can be downloaded. List price of the basic editor might be €1,585 (could not be recently verified).||http://www.catena-ffo.de/laytools.htm|
|iced||IC Editors Inc. Windows only editor that used to cost $2,750. Now it is free but with a restrictive licence. Work is on-going to open source it which might make it available under Linux (although the Windows drawing primitives would need to be replaced with GTK).||http://www.iceditors.com|
|virtuoso||Cadence Design Systems, Inc. The market leader. The price might be $40,000 to lease for one year.||http://www.cadence.com/products/custom_ic/veditor/index.aspx|
|max||Micro Magic Inc. Looks like a commercial version of Magic. Price is $30,000 for a one year licence. Despite the fancy price tag, something was freely downloadable from the web in the 2004 timeframe.||http://www.micromagic.com|
|laker||Silicon Canvas Inc. Linux and Unix based editor. Top of the line laker-ddl is $70,000 for a one year licence. Regular Laker 3 is $35,000 for a one year licence.||http://www.sicanvas.com|
|icstation||Mentor Graphics Corp. No public pricing information could be found.||http://www.mentor.com/cicd/icstation.html|