MOSFET MODELING FOR VLSI SIMULATION Theory and Practice docx

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MOSFET MODELING FOR VLSI SIMULATION Theory and Practice docx

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[...]... operation and characteristics are discussed in Chapter 3 Also included in this chapter is the overview of VLSI MOSFET characteristics such as MOSFET scaling, hot-electron effects, and MOSFET parasitic elements The MOS capacitor, which is used for the characterization of MOS process and is basic to understanding MOSFET operation, is the topic for Chapter 4 From a circuit modeling point of view, MOSFET. .. physics can understand the intricacies of MOSFET modeling Chapter 1 deals with the overview of various aspects of device modeling for circuit simulators Chapter 2 is a brief but complete (for understanding MOSFET models) review of semiconductor device physics and p n junction theory The MOS transistor characteristics as applied to current MOS technologies are discussed in Chapter 3 The theory of MOS capacitors... technologies The modeling of power MOSFETs is not covered in this book [13,14] 1.1 Circuit Design and MOSFETs 3 1.1 Circuit Design with MOSFETs For today’s circuit design, computer-aided simulation [151-[ 171 has become an indispensable tool because: 0 0 Manual techniques traditionally used for circuit analysis and design are simply inadequate because of the complexity of today’s circuits Simulation allows... for MOS VLSI devices and their model parameter determination Emphasis will be on models that are suitable for VLSI circuit simulation Although models discussed will be based on device physics, these models will often include empirical factors in order to account for the second order effects essential to model short geometry device behavior The basic semiconductor and p n junction theory essential for. .. essential for the understanding of MOS models are covered in Chapter 4 Different MOSFET models, such as threshold voltage, D C (steady-state), AC and reliability models are the topic of discussion in Chapters 5, 6, 7 and 8, respectively Chapters 9 and 10 deal with data measurements and model parameter extraction The diode and MOSFET models implemented in Berkeley SPICE, a defacto industry standard circuit... models for large and small geometry MOSFETs are developed in Chapter 5 The device DC models are discussed in Chapter 6 while AC models, both small and large signal, are covered in Chapter 7 Models for hot-electron effect, particularly substrate and gate current models, and device life-time models are covered in Chapter 8 The experimental setup, required for taking device data for different geometries and. .. geometries (different widths and lengths) For MOS VLSI it is common practice to fabricate MOS transistors of different widths and lengths on special test chips, also called test patterns, along with other test structures required for process development and characterization 1431 The electrical measurements on test transistors are then normally performed using an automatic wafer prober and measurement system... (Corporate Consultant) and Dr Llanda Richardson (Consultant )for their encouragement and assistance in writing this book I am deeply indebted to Dr F Fox, Dr D Ramey, and Mr K Mistry for their excellent work in careful reading of many of the chapters in the first draft of the manuscript and giving their critical comments I am also indebted to Drs R Rios, J Huang and Mr K Roal for this invaluable help... as desired and have good production yield Simulation allows designers to predict and optimize circuit performance At the lower end of the hierarchy of VLSI design tools, circuit sirnulators offer the most detailed level of simulation normally used for circuit design Some of the most successful circuit simulators of the early 1970s are still used extensively in the design and verification of VLSI chips;... accuracy and speed of simulation It has been found that for large circuits the MOSFET model evaluation accounts for a large percentage (up to 80%) of the total analysis time [151 This problem is further aggravated by the technology trend towards smaller and smaller device dimensions which increases the complexities of the models Thus realistic circuit modeling requires an understanding of the accuracy and . Tatsuya Ezaki BSIM4: Theory and Engineering of MOSFET Modeling for IC Simulation by Weidong Liu & Chenming Hu ASSET MOSFET MODELING FOR VLSl SIMULATION Theory and Practice Narain. record for this book is available from the British Library. MOSFET MODELING FOR VLSI SIMULATION Theory and Practice International Series on Advances in Solid State Electronics and Technology.

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  • Contents

  • Foreword

  • Preface

  • List of Symbols

  • Acronyms

  • 1 Overview

    • 1.1 Circuit Design with MOSFETs

    • 1.2 MOSFET Modeling

    • 1.3 Model Parameter Determination

    • 1.4 Interconnect Modeling

    • 1.5 Subjects Covered

    • References

    • 2 Review of Basic Semiconductor and pn Junction Theory

      • 2.1 Energy Band Model

      • 2.2 Intrinsic Semiconductor

        • 2.2.1 Fermi level

        • 2.3 Extrinsic or Doped Semiconductor

          • 2.3.1 Generation-Recombination

          • 2.3.2 Quasi-Fermi Level

          • 2.4 Electrical Conduction

            • 2.4.1 Carrier Mobility

            • 2.4.2 Resistivity and Sheet Resistance

            • 2.4.3 Transport Equations

            • 2.4.4 Continuity Equation

            • 2.4.5 Poisson’s Equation

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