Preface to the Third Edition |
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xiii | |
Preface to the Second Edition |
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xv | |
Preface to the First Edition |
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xvii | |
Physical Constants and Unit Conversions |
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xix | |
List of Symbols |
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xx | |
1 Introduction |
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1 | (8) |
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1.1 Evolution of VLSI Device Technology |
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1 | (4) |
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1.1.1 Historical Perspective |
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1 | (2) |
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1.1.2 Recent Developments |
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3 | (2) |
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1.2 Scope and Brief Description of the Book |
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5 | (4) |
2 Basic Device Physics |
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9 | (34) |
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2.1 Energy Bands in Silicon |
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9 | (6) |
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9 | (1) |
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10 | (2) |
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2.1.3 Distribution Function: Fermi Level |
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12 | (1) |
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2.1.4 Carrier Concentration |
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13 | (2) |
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2.2 n-Type and p-Type Silicon |
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15 | (6) |
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2.2.1 Donors and Acceptors |
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15 | (2) |
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2.2.2 Fermi Level in Extrinsic Silicon |
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17 | (3) |
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2.2.3 Degenerately Doped Silicon |
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20 | (1) |
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2.3 Carrier Transport in Silicon |
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21 | (7) |
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2.3.1 Drift Current: Mobility |
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22 | (3) |
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2.3.2 Velocity Saturation |
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25 | (1) |
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25 | (2) |
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27 | (1) |
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2.4 Basic Equations for Device Operation |
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28 | (12) |
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2.4.1 Poisson's Equation: Electrostatic Potential |
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28 | (4) |
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2.4.2 Current-Density Equations |
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32 | (3) |
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2.4.3 Generation and Recombination |
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35 | (3) |
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2.4.4 Current Continuity Equations |
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38 | (2) |
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40 | (3) |
3 p-n Junctions and Metal-Silicon Contacts |
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43 | (56) |
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43 | (31) |
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3.1.1 Energy-Band Diagrams and Built-in Potential for a p-n Diode |
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44 | (1) |
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3.1.2 Depletion Approximation |
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45 | (8) |
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3.1.3 Spatial Variation of Quasi-Fermi Potentials |
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53 | (9) |
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62 | (3) |
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3.1.5 Current-Voltage Characteristics Governed by the Diode Equation |
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65 | (2) |
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3.1.6 Space-Charge-Region Current |
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67 | (3) |
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3.1.7 Measured Diode Current and Ideality Factor |
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70 | (1) |
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3.1.8 Temperature Dependence and Magnitude of Diode Leakage Currents |
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71 | (1) |
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3.1.9 Minority-Carrier Mobility, Lifetime, and Diffusion Length |
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72 | (2) |
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3.2 Metal-Silicon Contacts |
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74 | (15) |
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3.2.1 Static Characteristics of a Schottky Diode |
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74 | (8) |
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3.2.2 Current-Voltage Characteristics of a Schottky Diode |
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82 | (5) |
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87 | (2) |
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3.3 High-Field Effects in Reverse-Biased Diodes |
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89 | (5) |
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3.3.1 Impact Ionization and Avalanche Breakdown |
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90 | (3) |
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3.3.2 Band-to-Band Tunneling |
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93 | (1) |
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94 | (5) |
4 MOS Capacitors |
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99 | (72) |
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4.1 Energy Band Diagram of an MOS System |
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99 | (7) |
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4.1.1 Free Electron Level, Work Function, and Flatband Voltage |
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99 | (3) |
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4.1.2 Gate Voltage, Surface Potential, and Charge in Silicon |
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102 | (1) |
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4.1.3 Accumulation, Depletion, and Inversion |
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103 | (3) |
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4.2 Electrostatic Potential and Charge Distribution in Silicon |
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106 | (8) |
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4.2.1 Solving Poisson's Equation |
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106 | (6) |
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4.2.2 Surface Potential and Charge Density as a Function of Gate Voltage |
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112 | (2) |
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4.3 Capacitance-Voltage Characteristics of MOS Capacitors |
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114 | (15) |
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114 | (1) |
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4.3.2 Capacitance Components in MOS |
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114 | (1) |
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4.3.3 C-V Characteristics in Different Bias Regions |
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115 | (4) |
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4.3.4 Split C-V Measurement |
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119 | (2) |
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4.3.5 Polysilicon Gate: Work Function and Depletion Effects |
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121 | (4) |
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4.3.6 MOS under Nonequilibrium |
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125 | (4) |
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4.4 Quantum Mechanical Effects in MOS |
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129 | (7) |
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4.4.1 Coupled Poisson-Schrodinger's Equations |
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129 | (1) |
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4.4.2 Quantum Effect on Inversion-Layer Depth |
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129 | (2) |
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4.4.3 Quantum-Mechanical Solution in Weak Inversion |
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131 | (5) |
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4.5 Interface States and Charge Traps in Oxide |
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136 | (13) |
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4.5.1 Effect of Oxide Charge on Flatband Voltage |
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137 | (1) |
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4.5.2 Interface-State Capacitance and Conductance |
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138 | (9) |
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4.5.3 Distributed Circuit Model for Oxide Traps |
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147 | (2) |
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4.6 High-Field Effects in Oxide and Oxide Degradation |
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149 | (18) |
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4.6.1 Tunneling into and through Silicon Dioxide |
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149 | (9) |
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4.6.2 Injection of Hot Carriers from Silicon into Silicon Dioxide |
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158 | (2) |
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4.6.3 High-Field Effects in Gated Diodes |
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160 | (2) |
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4.6.4 Dielectric Breakdown |
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162 | (5) |
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167 | (4) |
5 MOSFETs: Long Channel |
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171 | (35) |
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5.1 MOSFET I-V Characteristics |
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172 | (20) |
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5.1.1 Gradual Channel Approximation |
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173 | (3) |
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176 | (2) |
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5.1.3 Regional I-V Models |
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178 | (9) |
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5.1.4 Non-GCA Model for the Saturation Region |
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187 | (5) |
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5.1.5 pMOSFET I-V Characteristics |
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192 | (1) |
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5.2 MOSFET Channel Mobility |
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192 | (6) |
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5.2.1 Empirical Universal Mobility |
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192 | (4) |
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5.2.2 Strain Effect on Mobility |
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196 | (2) |
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5.3 MOSFET Threshold Voltage |
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198 | (4) |
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5.3.1 Substrate Sensitivity (Body Effect) |
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198 | (1) |
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5.3.2 Temperature Dependence of Threshold Voltage |
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199 | (2) |
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5.3.3 Quantum Effect on Threshold Voltage |
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201 | (1) |
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202 | (1) |
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203 | (3) |
6 MOSFETs: Short Channel |
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206 | (58) |
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206 | (13) |
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6.1.1 Threshold Voltage Roll-off |
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206 | (4) |
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6.1.2 Analytic Solutions to 2-D Poisson's Equation in Subthreshold |
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210 | (9) |
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219 | (17) |
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6.2.1 Velocity Saturation |
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219 | (10) |
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229 | (7) |
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6.3 MOSFET Threshold Voltage and Channel Profile Design |
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236 | (20) |
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6.3.1 Threshold Voltage Requirement |
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237 | (4) |
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6.3.2 Channel Profile Design |
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241 | (5) |
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6.3.3 Nonuniform Channel Doping |
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246 | (7) |
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6.3.4 Discrete Dopant Effects on Threshold Voltage |
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253 | (3) |
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6.4 MOSFET Degradation and Breakdown at High Fields |
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256 | (6) |
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6.4.1 Hot-Carrier Effects |
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257 | (2) |
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6.4.2 Negative-Bias-Temperature Instability |
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259 | (1) |
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260 | (2) |
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262 | (2) |
7 Silicon-on-Insulator and Double-Gate MOSFETs |
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264 | (31) |
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265 | (11) |
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7.1.1 Long-Channel SOI MOSFETs |
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265 | (6) |
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7.1.2 Short-Channel SOI MOSFETs |
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271 | (5) |
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7.2 Double-Gate and Nanowire MOSFETs |
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276 | (16) |
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7.2.1 Analytic Potential Model for Symmetric DG MOSFETs |
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277 | (4) |
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7.2.2 Short-Channel DG MOSFETs |
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281 | (6) |
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287 | (4) |
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7.2.4 Scaling Limits of DG and Nanowire MOSFETs |
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291 | (1) |
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292 | (3) |
8 CMOS Performance Factors |
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295 | (66) |
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295 | (3) |
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8.1.1 Constant-Field Scaling |
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295 | (2) |
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297 | (1) |
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8.2 Basic CMOS Circuit Elements |
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298 | (18) |
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299 | (10) |
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8.2.2 CMOS NAND and NOR Gates |
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309 | (4) |
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8.2.3 Inverter and NAND Layouts |
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313 | (3) |
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316 | (16) |
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8.3.1 Source-Drain Resistance |
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317 | (4) |
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8.3.2 Parasitic Capacitances |
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321 | (3) |
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324 | (2) |
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8.3.4 Interconnect R and C |
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326 | (6) |
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8.4 Sensitivity of CMOS Delay to Device Parameters |
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332 | (20) |
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8.4.1 Propagation Delay and Delay Equation |
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333 | (6) |
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8.4.2 Delay Sensitivity to Channel Width, Length, and Gate Oxide Thickness |
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339 | (4) |
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8.4.3 Sensitivity of Delay to Power-Supply Voltage and Threshold Voltage |
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343 | (1) |
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8.4.4 Sensitivity of Delay to Parasitic Resistance and Capacitance |
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344 | (4) |
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8.4.5 Effect of Transport Parameters on CMOS Delay |
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348 | (1) |
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8.4.6 Delay of Two-Way NAND Gates |
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349 | (3) |
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8.5 Performance Factors of MOSFETs in RF Circuits |
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352 | (6) |
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8.5.1 Small-Signal Equivalent Circuit |
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353 | (1) |
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8.5.2 Unity-Current-Gain Frequency |
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354 | (1) |
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8.5.3 Power Gain Condition of a Two-Port Network |
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354 | (1) |
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8.5.4 Unity Power-Gain Frequency |
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355 | (3) |
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358 | (3) |
9 Bipolar Devices |
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361 | (64) |
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9.1 Basic Operation of a Bipolar Transistor |
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365 | (5) |
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9.1.1 Modifying the Simple Diode Theory for Describing Bipolar Transistors |
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365 | (5) |
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9.2 Ideal Current-Voltage Characteristics |
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370 | (15) |
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9.2.1 Intrinsic-Base Resistance and Emitter Current Crowding |
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371 | (4) |
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375 | (3) |
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378 | (4) |
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382 | (2) |
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9.2.5 Ideal IC-VCE Characteristics |
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384 | (1) |
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9.3 Measured Characteristics of Typical n-p-n Transistors |
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385 | (15) |
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9.3.1 Effect of Emitter and Base Series Resistances |
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386 | (3) |
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9.3.2 Effect of Base-Collector Voltage on Collector Current |
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389 | (3) |
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9.3.3 Collector-Current Falloff |
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392 | (4) |
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9.3.4 Excess Base Current Associated with Extrinsic-Base-Emitter Junction |
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396 | (4) |
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400 | (1) |
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9.5 Diffusion Capacitance in an Emitter-Base Diode |
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401 | (6) |
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9.5.1 Small-Signal Current in a Forward-Biased Diode |
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401 | (4) |
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9.5.2 Low-Frequency [ ωτpE < 1 and ωtB < 1] Diffusion Capacitance |
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405 | (1) |
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9.5.3 Diffusion Capacitance at High Frequencies [ ωτpE > 1] |
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406 | (1) |
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9.6 Bipolar Device Models for Circuit Analyses |
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407 | (9) |
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9.6.1 Basic Steady-State Model |
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407 | (2) |
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409 | (7) |
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416 | (5) |
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9.7.1 Common-Base Current Gain in the Presence of Base-Collector Junction Avalanche |
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417 | (1) |
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9.7.2 Saturation Currents in a Transistor |
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418 | (1) |
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9.7.3 Relation between BVCEO and BVCBO |
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419 | (2) |
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9.7.4 Breakdown Voltages of Symmetric Lateral Bipolar Transistors on SOI |
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421 | (1) |
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421 | (4) |
10 Bipolar Device Design |
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425 | (60) |
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10.1 Design of the Emitter of a Vertical Bipolar Transistor |
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425 | (2) |
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10.1.1 Diffused or Implanted-and-Diffused Emitter |
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426 | (1) |
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10.1.2 Polysilicon Emitter |
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427 | (1) |
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10.2 Design of the Base Region of a Vertical Bipolar Transistor |
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427 | (7) |
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10.2.1 Base Sheet Resistivity and Collector Current Density |
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429 | (1) |
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10.2.2 Ion-Implanted versus Epitaxially Grown Intrinsic Base |
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430 | (3) |
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10.2.3 General Expression for Base Transit Time |
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433 | (1) |
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10.3 Design of the Vertical Bipolar Transistor Collector Region |
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434 | (3) |
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10.3.1 Collector Design for Low-Injection Operation |
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435 | (1) |
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10.3.2 Collector Design for High-Injection Operation |
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436 | (1) |
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10.4 SiGe-Base Vertical Bipolar Transistors |
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437 | (31) |
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10.4.1 SiGe-Base Vertical Transistors Having Linearly Graded Base Bandgap |
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438 | (5) |
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10.4.2 Base Current When Ge Is Present in the Emitter |
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443 | (4) |
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10.4.3 Transistors Having a Trapezoidal Ge Distribution in the Base |
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447 | (4) |
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10.4.4 Transistors Having a Constant Ge Distribution in the Base |
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451 | (3) |
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10.4.5 Some Optimal Ge Profiles |
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454 | (5) |
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10.4.6 Base-Width Modulation by VBE |
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459 | (3) |
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10.4.7 Reverse-Mode I-V Characteristics |
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462 | (3) |
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10.4.8 Heterojunction Nature of a SiGe-Base Vertical Bipolar Transistor |
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465 | (2) |
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10.4.9 SiGe-Base Vertical Bipolar Transistor on Thin SOI |
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467 | (1) |
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10.5 Design of Symmetric Lateral Bipolar Transistors on SOI |
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468 | (11) |
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10.5.1 Relationship Governing Emitter-to-Collector Spacing and Base Width |
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470 | (1) |
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10.5.2 Analytic Model for Collector and Base Currents |
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471 | (2) |
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10.5.3 Analytic Ebers-Moll Model Equations |
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473 | (2) |
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10.5.4 Early Voltage and Emitter-Collector Spacing |
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475 | (1) |
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10.5.5 Analytic Model for the Transit Times |
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475 | (1) |
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10.5.6 On the Fabrication of Thin-Base Symmetric Lateral Transistors |
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476 | (1) |
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10.5.7 SiGe-on-Insulator Symmetric lateral n-p-n Transistors |
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477 | (1) |
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10.5.8 Symmetric Si-Emitter/Collector SiGe-Base Lateral HBT |
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478 | (1) |
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479 | (6) |
11 Bipolar Performance Factors |
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485 | (36) |
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11.1 Figures of Merit of a Bipolar Transistor |
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485 | (4) |
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486 | (2) |
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11.1.2 Maximum Oscillation Frequency |
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488 | (1) |
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489 | (1) |
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11.2 ECL Circuit and Delay Components |
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489 | (4) |
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11.2.1 Transit-Time Delay Component |
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491 | (1) |
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11.2.2 Intrinsic-Base-Resistance Delay Component |
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492 | (1) |
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11.2.3 Parasitic-Resistance Delay Components |
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492 | (1) |
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11.2.4 Load-Resistance Delay Component |
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492 | (1) |
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11.2.5 Diffusion-Capacitance Delay Component |
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493 | (1) |
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11.3 Speed-versus-Current Characteristics of Bipolar Transistors |
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493 | (3) |
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11.3.1 fT and fmax as a Function of Collector Current |
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493 | (2) |
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11.3.2 Logic Gate Delay as a Function of Collector Current |
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495 | (1) |
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11.4 Vertical-Transistor Optimization from Data Analyses |
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496 | (2) |
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11.5 Bipolar Device Scaling for Logic Circuits |
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498 | (4) |
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11.5.1 Vertical-Transistor Scaling for ECL |
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498 | (1) |
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11.5.2 Symmetric-Lateral-Transistor Scaling for Logic Circuits |
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499 | (1) |
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11.5.3 Power-Dissipation Issues with Resister-Load Bipolar Logic Circuits |
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500 | (2) |
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11.6 Vertical-Transistor Design Optimization for RF and Analog Circuits |
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502 | (5) |
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11.6.1 The Single-Transistor Amplifier |
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502 | (1) |
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11.6.2 Maximizing fT of a Vertical Transistor |
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503 | (1) |
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11.6.3 Minimizing rbi of a Vertical Transistor |
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504 | (1) |
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11.6.4 Maximizing fmax of a Vertical Transistor |
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505 | (1) |
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11.6.5 Maximizing VA of a Vertical Transistor |
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505 | (1) |
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11.6.6 Examples of Vertical-Transistor RF and Analog Design Tradeoffs |
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505 | (2) |
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11.7 Symmetric-Lateral-Transistor Design Tradeoffs and Optimization for RF and Analog Circuits |
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507 | (4) |
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11.7.1 Calculated Low-Injection fT and fmax of Symmetric Lateral n-p-n |
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507 | (2) |
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11.7.2 Fin-Structure Symmetric Lateral Transistors for fmax > 1 THz |
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509 | (1) |
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11.7.3 Noise Reduction with Substrate Bias |
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510 | (1) |
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11.8 Unique Opportunities from Symmetric Lateral Bipolar Transistors |
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511 | (6) |
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11.8.1 Symmetric Lateral Bipolar Transistor as a High-Drive-Current Device |
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511 | (2) |
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11.8.2 Revisit Integrated Injection Logic Circuits and SRAM |
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513 | (1) |
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11.8.3 Complementary Bipolar Logic Circuits |
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514 | (2) |
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11.8.4 Performance-On-Demand Designs with 12L or CBipolar Circuits |
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516 | (1) |
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517 | (4) |
12 Memory Devices |
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521 | (44) |
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12.1 Static Random-Access Memory |
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523 | (18) |
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523 | (9) |
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12.1.2 Other Bistable MOSFET SRAM Cells |
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532 | (1) |
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533 | (8) |
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12.2 Dynamic Random-Access Memory |
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541 | (5) |
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12.2.1 Basic DRAM Cell and Its Operation |
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541 | (4) |
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12.2.2 Device Design and Scaling Considerations for a DRAM Cell |
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545 | (1) |
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546 | (18) |
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12.3.1 MOSFET Nonvolatile Memory Devices |
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547 | (7) |
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12.3.2 Flash Memory Arrays |
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554 | (5) |
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12.3.3 Devices for a NOR Array |
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559 | (5) |
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564 | (1) |
References |
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565 | (22) |
Index |
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587 | |