| List of Symbols | p. XIII |
| Key to the different layers in integrated circuits | p. XVIII |
| Introduction | p. 1 |
| Basic principles of integrated circuits technology | p. 3 |
| Film technology | p. 13 |
| Film production processes | p. 13 |
| The CVD process | p. 13 |
| Thermal oxidation | p. 20 |
| Vapour phase deposition | p. 27 |
| Sputtering | p. 29 |
| Spin coating | p. 33 |
| Film production by ion implantation | p. 34 |
| Film production using wafer-bonding and back-etching | p. 34 |
| Annealing techniques | p. 35 |
| The monocrystalline silicon wafer | p. 38 |
| Geometry and crystallography of silicon wafers | p. 38 |
| Doping of silicon wafers | p. 39 |
| Monocrystalline silicon growing techniques | p. 39 |
| Epitaxial layers | p. 41 |
| Uses for epitaxial layers | p. 41 |
| Diffusion of doping atoms from the substrate into the epitaxial layer | p. 43 |
| Thermal SiO2 layers | p. 46 |
| Uses of thermal SiO2 layers | p. 46 |
| The LOCOS technique | p. 47 |
| Properties of thin thermal SiO2 films | p. 53 |
| Deposited SiO2 films | p. 59 |
| Creating deposited SiO2 films | p. 59 |
| Applications of deposited SiO2 films | p. 60 |
| Spacer technology | p. 60 |
| Trench isolation | p. 62 |
| SiO2 isolation films for multi-level metallization | p. 62 |
| Phosphorus glass films | p. 63 |
| Producing phosphorus glass films | p. 64 |
| Flow-glass | p. 66 |
| Thermal phosphorus glass | p. 67 |
| Silicon nitride films | p. 67 |
| Producing silicon nitride films | p. 68 |
| Nitride films as an oxidation barrier | p. 68 |
| Nitride films as a capacitor dielectric | p. 69 |
| Using nitride films for passivation | p. 70 |
| Polysilicon films | p. 70 |
| Producing polysilicon films | p. 70 |
| Grain structure of polysilicon films | p. 71 |
| Conductivity of polysilicon films | p. 72 |
| Uses of polysilicon films | p. 74 |
| Silicide films | p. 78 |
| Producing silicide Films | p. 79 |
| Polycide films | p. 81 |
| Silication of source/drain regions | p. 83 |
| Refractory metal films | p. 83 |
| Aluminium films | p. 85 |
| Producing aluminium films | p. 85 |
| Crystal structure ofaluminium films | p. 86 |
| Electromigration in aluminium interconnections | p. 87 |
| Aluminium-silicon contacts | p. 88 |
| Aluminium-aluminium contacts | p. 90 |
| Organic films | p. 91 |
| Spin-on glass films | p. 91 |
| Polyimide films | p. 92 |
| Lithography | p. 95 |
| Linewidth dimension, placement errors and defects | p. 96 |
| Photolithography | p. 98 |
| Photoresist films | p. 98 |
| Formation of photoresist patterns | p. 102 |
| Light intensity variation in the photoresist | p. 105 |
| Special photoresist techniques | p. 110 |
| Optical exposure techniques | p. 116 |
| Resolution capability ofoptical exposure techniques . | p. 119 |
| Alignment accuracy of optical exposure equipment | p. 130 |
| Defects occurring in optical lithography | p. 133 |
| X-ray lithography | p. 134 |
| Wavelength region for X-ray lithography | p. 135 |
| X-ray resists | p. 136 |
| X-ray sources | p. 137 |
| X-ray masks | p. 142 |
| Alignment procedure for X-ray lithography | p. 144 |
| Radiation damage in X-ray lithography | p. 144 |
| Opportunities for Y-ray lithography | p. 144 |
| Electron lithography | p. 145 |
| Electron resists | p. 145 |
| Resolution capability of electron lithography | p. 146 |
| Electron beam pattern generators | p. 148 |
| Electron projection equipment | p. 153 |
| Alignment techniques in electron lithography | p. 154 |
| Radiation damage in electron lithography | p. 154 |
| Ion lithography | p. 156 |
| Ion resists | p. 156 |
| Ion beam writing | p. 158 |
| Ion beam projection | p. 160 |
| Resolution capability ofion lithography | p. 162 |
| Pattern generation without using lithography | p. 166 |
| Etching technology | p. 169 |
| Wet etching | p. 170 |
| Wet chemical etching | p. 170 |
| Chemical-mechanical polishing | p. 171 |
| Dry etching | p. 174 |
| Physical dry etching | p. 174 |
| Chemical dry etching | p. 176 |
| Physical-chemical dry etching | p. 178 |
| Chemical etching reactions | p. 186 |
| Etching gases | p. 188 |
| Process optimization | p. 188 |
| Endpoint detection | p. 193 |
| Dry etch processes | p. 196 |
| Dry etching of silicon nitride | p. 197 |
| Dry etching of polysilicon | p. 197 |
| Dry etching ofmonocrystalline silicon | p. 199 |
| Dry etching ofmetal silicides and refractory metals | p. 200 |
| Dry etching of silicon dioxide | p. 201 |
| Dry etching ofaluminium | p. 203 |
| Dry etching ofpolymers | p. 205 |
| Doping technology | p. 207 |
| Thermal doping | p. 208 |
| Doping by ion implantation | p. 209 |
| Ion implantation machines | p. 209 |
| Implanted doping profiles | p. 211 |
| Activation and diffusion of dopant atoms | p. 219 |
| Activating implanted dopant atoms | p. 219 |
| Intrinsic diffusion of dopant atoms | p. 220 |
| Diffusion for high concentrations of dopant atoms | p. 223 |
| Oxidation enhanced diffusion | p. 224 |
| Diffusion of dopant atoms at interfaces | p. 225 |
| Diffusion of dopant atoms in films | p. 227 |
| Sheet resistance of doped layers | p. 229 |
| Diffusion at the edge of doped regions | p. 230 |
| Diffusion of non-doping materials | p. 231 |
| Cleaning technology | p. 235 |
| Contaminants and their effect | p. 235 |
| Clean rooms, clean materials and clean processes | p. 239 |
| Clean rooms | p. 239 |
| Clean materials | p. 242 |
| Clean processing | p. 244 |
| Wafer cleaning | p. 244 |
| Process integration | p. 249 |
| The various MOS and bipolar technologies | p. 249 |
| Active components in integrated circuits | p. 249 |
| Comparsion of MOS and bipolar technologies | p. 249 |
| Passive components in integrated circuits | p. 252 |
| Technology architecture | p. 252 |
| Architecture of MOS technology | p. 252 |
| Architecture of bipolar and BICMOS technologies | p. 254 |
| Transistors in integrated circuits | p. 256 |
| Design of MOS transistors and their isolation | p. 256 |
| Design of DMOS transistors | p. 262 |
| Design of bipolar transistors and their isolation | p. 264 |
| Memory cells | p. 267 |
| Design of static memory cells | p. 267 |
| Design of dynamic memory cells | p. 269 |
| Design of non-volatile memory cells | p. 272 |
| Multilayer metallization | p. 276 |
| Planarization of surfaces in integrated circuits | p. 277 |
| Contacts in integrated circuits | p. 281 |
| Metallization in integrated ciruits | p. 284 |
| Passivation of integrated circuits | p. 285 |
| Detailed process sequence ofselected technologies | p. 286 |
| Digital CMOS process | p. 286 |
| BICMOS process | p. 286 |
| Microwave bipolar process | p. 286 |
| DRAM process | p. 295 |
| References | p. 323 |
| Subject Index | p. 329 |
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