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A COMMOM PLATFORM AND STANDARD FOR COMPACT MODEL DEVELOPMENT!
Lining Zhang, Mansun Chan!
Department of ECE, HKUST!
interactive Modeling and Online Simulation Platform
THE ROLE OF COMPACT MODELS!
Foundries EDA Vendors
Circuit Designers
Device Engineers
Professors
Compact Model
• To understand the device physics • To compare device characteristics
• To communicate with users • To predict performance variations
• Part of their simulation tools • Communication with customers
• To understand the device physics • To explain concepts • To publish papers
• To understand new devices • To performing circuit simulation
• MatLab • Verilog-A and compiler • Device data for verifications • Benchmark tests
• Parameter extraction • Reliability simulation tools • Statistical modeling tools
• Simulation platform (low cost) • Model documents • Codes (Matlab/Verilog-A)
• Simulation platform • Model documents • Parameter extraction
• Simulation platform • Model documents • Model test results • User feedback
Tools are scattered
CURRENT MODELING INFRASTRUCTURE!
Experimental data, Device physics
Model 1
Model 2
Model 3
Coding, testing, implementation, documentation
Circuit Simulation
Technologist Modelers
Accessing, changing, evaluating models,
parameter extraction
Designers Applications
LIFE SPAN OF A MODEL!
Partial Model Papers published
Addition/improvement
Convergence
Implementation
Mathematical modification
Documentation
Paper published
Completeness
Verification/Testing
End
End Over 90%
Available in tools Excel !
• A lot of models do not have complete I-V (only regional or factors affecting I-V)
• A lot of models have discontinuous derivatives
• Many models have implicit functions in the I-V equations
• Many models are not symmetrical
• Many models do not have a clearly defined parameter set Parameter Extraction
methodology
for exploratory studies
Academic Model
A DESIRABLE ENVIRONMENT!
v All tools are readily available (through the internet/cloud)!Ø Model authoring language (Verilog-A) and compiler!
Ø Simulation platform!
Ø Parameter extraction tools!
Ø Benchmark tests and result!
Ø Documentations!
Ø User feedback and expectation!
v Process standardization and education!Ø A standardized compact model development and evaluation process!
Ø A standardized process to release newly developed compact models!
Ø An educational platform to help users to understand the process!
A REVOLUTIONARY DISTRIBUTION CONCEPT!
v The App store has significantly shorten the distance between programmer and users since July 11, 2008!
v Can we have an App store for compact models?!
AN APP STORE FOR COMPACT MODELING!
Foundry
Circuit
designer
EDA vendors
Device Engineers
Model extracted
Simulator implementation
Design verified
Simulation flow verified
i-MOS
v A project started in June 2011 !
COMPONENTS OF i-MOS!
Browser Interface User
authentication User Input
Simulation Instruction
Ngspice Simulation Engine
Output Variables
Parameter Library
Graphic user interface
Output to Users
i-MOS Platform
THE i-MOS MODEL INTERFACE!
THE i-MOS MODEL INTERFACE!
THE i-MOS MODEL INTERFACE!
THE i-MOS MODEL INTERFACE!
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THE i-MOS MODEL INTERFACE!
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THE i-MOS MODEL INTERFACE!
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THE i-MOS MODEL INTERFACE!
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THE USER LIBRARY!
THE USER LIBRARY!
CIRCUIT SIMULATION!
CIRCUIT SIMULATION!
CIRCUIT SIMULATION!
CIRCUIT SIMULATION!
MODEL IMPLEMENTATION!registered as a
model developer
defining model pages with standard templates
Submit model Verilog-A code
Model Verification
Compilation with ADMS
Internal qualification process
Output to the i-MOS system
qualification process
model development server
user execution and feedback
i-MOS server currently done by
hand Code Modification
MODELING RESOURCES!
v Users are welcome to post their activities on i-MOS!
MODELING RESOURCES!
v Users are welcome to post their activities on i-MOS!
MODELING RESOURCES!
v Users are welcome to post their activities on i-MOS!
MODELS IMPLEMENTED IN CURRENT SYSTEM!Device Type Group Availability Symmetric Double Gate MOSFET HKUST/Peking University Online
Silicon Nanowire Transistor HKUST/Peking University Online
AlGaN HEMT HKUST/Tsinghua University Online
CNT FET Arizona University Online
CNT FET Stanford University Online
Tunneling FET HKUST Online
Hydrodynamic DG MOSFET Universitat Rovira i Virgili Upcoming
Organic TFT In progress
Phase Change Memory In progress
v We are encouraging model developers to post their models here!
v Researchers can work together to add modules to existing models!
OTHER SERVICES TO BE LAUNCHED!
v Automated Model Authoring kits!v Parameter extraction!v Library of standard parameter set for industrial models!v Library of experimental and atomistic simulation data!v Standard model testing!v Statistical simulation interface!v A graphical online simulation interface!
http://www.circuitlab.com!PSPICE interface!
PLEASE HELP US TO ADVERTISE !
v Please visit the following site:!
http://i-mos.org!
v A scheduled update in approximately every 3 months!
THE i-MOS TEAM!
v Principle Investigator: Prof. Mansun Chan !
v Post-Doc Fellow: Dr. Muthupandian Cheralathan!v Project Manager: Dr. Lining Zhang!
Ø Aixi Zhang!Ø Yin Chu!
v Research Students:!Ø Salahuddin Raju!Ø Yin Sun!
v Programmers:!Ø Ngai Sing Ben Ng!Ø Ka Chun Cyrix Tam!
Ø Kwok Shiu Andy Wong!Ø Sai Kin Cheung!
THE BEGINNING!
THANK YOU!!