Contributors |
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xiii | |
Foreword |
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xv | |
Preface |
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xvii | |
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1 Introduction to High-Density Through Silicon Stacking Technology |
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1 | (26) |
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1 | (4) |
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1.2 3D Integrated Circuit Technologies |
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5 | (4) |
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5 | (3) |
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1.2.2 Via-Middle Through Silicon Stacking |
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8 | (1) |
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1.3 TSS Drivers and Product Architectures |
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9 | (8) |
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9 | (1) |
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1.3.2 Examples of Architectural Uniqueness from Through Silicon Stacking |
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10 | (7) |
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1.3.3 Software Simplification Enabled by TSS |
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17 | (1) |
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17 | (1) |
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1.5 TSS Supply Chain Options |
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18 | (2) |
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1.6 Challenges for Through Silicon Stacking |
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20 | (3) |
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20 | (1) |
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1.6.2 Design Tools, Flow, Kits |
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21 | (1) |
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1.6.3 Design for Test and Manufacturing Test |
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21 | (1) |
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1.6.4 Thermal Hotspots, Mechanical Stress, and Power Delivery |
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22 | (1) |
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1.6.5 Fabrication Processes, Materials, and Structures |
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22 | (1) |
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1.6.6 Technology Adoption |
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22 | (1) |
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23 | (1) |
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23 | (4) |
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2 A Practical Design Eco-System for Heterogeneous 3D IC Products |
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27 | (50) |
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2.1 Requirements for 3D Design Eco-System |
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29 | (7) |
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2.1.1 2D Design Experiences |
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30 | (1) |
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2.1.2 Causes for Incremental Design Specification Instability in 3D |
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31 | (2) |
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2.1.3 Causes for Incremental Process Constraint Instability in 3D |
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33 | (2) |
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2.1.4 3D Design Eco-System |
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35 | (1) |
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36 | (10) |
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2.2.1 PathFinding Objectives |
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36 | (3) |
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2.2.2 Ideal PathFinding Flow |
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39 | (3) |
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2.2.3 PathFinding versus Design-Authoring Requirements |
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42 | (2) |
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2.2.4 3D PathFinding and Trade-Off Discussion |
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44 | (2) |
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46 | (17) |
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2.3.1 TechTuning Objectives |
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46 | (3) |
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2.3.2 TechTuning Implementation |
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49 | (12) |
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2.3.3 TechTuning Infrastructure |
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61 | (2) |
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63 | (10) |
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65 | (1) |
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2.4.2 Synthesis and Simulation |
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66 | (1) |
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2.4.3 Physical Design, Extraction, and Verification |
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66 | (3) |
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69 | (3) |
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2.4.5 Timing and Power Analyses |
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72 | (1) |
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2.5 Summary and Conclusions |
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73 | (1) |
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73 | (4) |
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3 Design Automation and TCAD Tool Solutions for Through Silicon Via-Based 3D IC Stack |
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77 | (36) |
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77 | (1) |
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3.2 Planning: 3D System Architecture |
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78 | (2) |
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78 | (1) |
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3.2.2 Gross Thermal Analysis |
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79 | (1) |
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3.2.3 Board-Package-IC Co-Design |
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79 | (1) |
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80 | (7) |
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80 | (1) |
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3.3.2 Floor Planning and Place and Route |
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80 | (2) |
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3.3.3 Clock and Power Networks |
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82 | (3) |
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85 | (1) |
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85 | (2) |
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3.4 Verification and Sign-Off |
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87 | (12) |
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87 | (3) |
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3.4.2 Power-Rail Analysis |
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90 | (9) |
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3.5 Modeling Thermomechanical-Stress-Related Issues in TSV |
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99 | (9) |
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3.5.1 New Thermomechanical Stress in a 3D TSV Stack |
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99 | (3) |
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3.5.2 TSV Stress-Induced Performance Modulation |
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102 | (1) |
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3.5.3 TSV Stress-Induced Reliability Concerns |
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102 | (2) |
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3.5.4 TSV Diameter Effects |
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104 | (2) |
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3.5.5 Insulation Material Effects |
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106 | (1) |
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3.5.6 TSV Material Effects |
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107 | (1) |
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3.6 Summary and Conclusions |
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108 | (2) |
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110 | (3) |
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4 Process Integration for TSV Manufacturing |
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113 | (42) |
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113 | (2) |
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4.2 Evolutionary Path to 3D Stacking |
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115 | (5) |
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115 | (1) |
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115 | (1) |
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4.2.3 Micro-Bumps, Pillar and Re-Distribution Layers |
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116 | (1) |
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117 | (1) |
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118 | (2) |
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120 | (2) |
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122 | (2) |
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4.4.1 TSV-Related Processing on Full-Thickness Wafers |
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123 | (1) |
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4.4.2 TSV-Related Processing on Thinned Wafers |
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123 | (1) |
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124 | (15) |
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124 | (3) |
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4.5.2 TSV Etch, Photoresist Strip, and Wet Clean |
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127 | (1) |
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4.5.3 Insulator Deposition with Chemical Vapor Deposition |
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128 | (1) |
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129 | (1) |
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130 | (2) |
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4.5.6 Chemical Mechanical Polish (CMP) of Copper |
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132 | (1) |
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133 | (3) |
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4.5.8 Wafer Thinning for TSV Processes |
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136 | (2) |
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4.5.9 Metrology and Inspection |
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138 | (1) |
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4.6 TSV-Integrated Processing |
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139 | (14) |
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139 | (2) |
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141 | (5) |
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4.6.3 Vias from the Topside |
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146 | (1) |
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147 | (1) |
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4.6.5 Via Reveal Process (Revealing the Via-Middle TSVs from the Backside) |
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148 | (4) |
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152 | (1) |
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153 | (2) |
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5 High-Aspect-Ratio Silicon Etch for TSV |
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155 | (78) |
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155 | (4) |
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5.1.1 History of High-Aspect-Ratio (HAR) Silicon Etch |
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155 | (1) |
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5.1.2 HAR Silicon-Etch Applications |
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156 | (1) |
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5.1.3 HAR Silicon-Etch Methods |
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157 | (2) |
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5.2 Plasma-Etch Fundamentals |
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159 | (36) |
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159 | (8) |
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167 | (6) |
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5.2.3 Mass-Transport Phenomena in Plasmas and TSV Etch |
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173 | (4) |
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5.2.4 Chemical Reactions and Kinetics |
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177 | (8) |
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185 | (6) |
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191 | (4) |
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5.3 Time-Multiplexed Alternating Process |
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195 | (19) |
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5.3.1 Etch Rate and Selectivity |
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203 | (2) |
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5.3.2 Profile and Surface Roughness |
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205 | (2) |
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5.3.3 Aspect-Ratio-Dependent Etch (ARDE) |
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207 | (3) |
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210 | (2) |
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212 | (1) |
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212 | (2) |
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5.4 Steady-State Etch Process |
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214 | (6) |
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5.4.1 Reactive Ion Etch (RIE) |
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214 | (1) |
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5.4.2 Etching at Cryogenic Condition |
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215 | (3) |
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5.4.3 Simultaneous Etch with Passivation |
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218 | (2) |
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5.5 Etch Method and Equipment |
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220 | (3) |
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5.5.1 RIE and Early Etchers |
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220 | (1) |
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5.5.2 Etchers Using Magnetic Field |
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221 | (1) |
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5.5.3 Inductively Coupled Plasma Etchers |
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222 | (1) |
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223 | (1) |
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224 | (9) |
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6 Dielectric Deposition for Through Silicon Vias |
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233 | (44) |
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6.1 Introduction to Dielectric Films |
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233 | (2) |
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6.2 Key Requirements for Dielectric Process Used in 3D TSV |
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235 | (10) |
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6.2.1 Deposition Temperature |
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235 | (2) |
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6.2.2 Confomality of Dielectrics |
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237 | (4) |
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241 | (1) |
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6.2.4 Electric Properties of Dielectrics |
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242 | (2) |
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244 | (1) |
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6.3 Fundamentals of Chemical Vapor Deposition (CVD) |
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245 | (4) |
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6.4 CVD Methods for TSV Application |
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249 | (22) |
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6.4.1 Atmospheric Pressure Chemical Vapor Deposition (APCVD) |
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249 | (2) |
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6.4.2 Low-Pressure CVD (LPCVD) |
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251 | (7) |
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6.4.3 Subatmospheric Chemical Vapor Deposition (SACVD) |
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258 | (2) |
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6.4.4 Plasma-Enhanced Chemical Vapor Deposition (PECVD) |
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260 | (11) |
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271 | (2) |
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273 | (4) |
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7 Barrier and Seed Deposition |
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277 | (32) |
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277 | (1) |
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278 | (1) |
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7.3 Deposition Technologies |
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279 | (4) |
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279 | (1) |
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280 | (1) |
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280 | (2) |
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282 | (1) |
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283 | (1) |
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283 | (1) |
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7.4 PVD Technology Details |
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283 | (14) |
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283 | (4) |
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7.4.2 Ionized Metal Sources and Step Coverage |
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287 | (10) |
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297 | (6) |
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303 | (1) |
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303 | (1) |
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303 | (6) |
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8 Copper Electrodeposition for TSV |
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309 | (44) |
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8.1 Introduction to Plating |
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309 | (11) |
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309 | (3) |
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312 | (6) |
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318 | (2) |
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8.2 3D Chip Stacking Using Through Silicon Via |
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320 | (3) |
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8.2.1 General Overview of 3D Chip Stacking |
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320 | (1) |
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8.2.2 Plating Needs for 3D Chip Stacking |
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321 | (1) |
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8.2.3 Through Silicon Via Formation |
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322 | (1) |
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8.3 Copper Plating for TSV |
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323 | (25) |
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8.3.1 Advantages of Electrodeposition Processes |
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323 | (1) |
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8.3.2 Applications of Cu Plating for TSV |
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324 | (1) |
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8.3.3 Via-Processing Steps |
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325 | (2) |
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327 | (1) |
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327 | (4) |
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8.3.6 Plating Chemistries |
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331 | (3) |
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334 | (9) |
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8.3.8 TSV-Integration Challenges |
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343 | (2) |
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8.3.9 Equipment for Plating |
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345 | (3) |
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348 | (1) |
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349 | (1) |
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349 | (4) |
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9 Chemical Mechanical Polishing for TSV Applications |
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353 | (56) |
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353 | (5) |
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358 | (12) |
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9.2.1 Removal Rate and Film Properties |
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358 | (2) |
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9.2.2 Removal Profile Control with Hardware |
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360 | (1) |
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9.2.3 Planarization Efficiency |
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360 | (2) |
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9.2.4 Dishing, Erosion, and Corrosion versus Process Conditions |
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362 | (3) |
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365 | (4) |
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9.2.6 CMP Evolution and Disruptive Technologies |
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369 | (1) |
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9.3 Process Requirement for TSV versus Cu Damascene |
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370 | (4) |
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9.4 CMP Process Control and Metrology |
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374 | (5) |
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9.5 CMP Process for Different TSV-Integration Flows |
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379 | (6) |
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9.5.1 Cu CMP for Via-Middle |
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379 | (1) |
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9.5.2 CMP Process for Via-Last |
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380 | (2) |
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9.5.3 CMP Process Result for TSV |
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382 | (3) |
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9.6 Wafer Handling and Wafer-Backside Polishing for Via Reveal |
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385 | (8) |
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9.6.1 Handling of Bonded TSV Wafers |
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385 | (3) |
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9.6.2 Direct CMP of Si/Cu After Si Grinding |
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388 | (2) |
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9.6.3 CMP of Dielectric and Cu Nails After Passivation |
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390 | (3) |
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9.7 Further CMP-Process Variables and Characterization |
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393 | (5) |
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9.7.1 Local Pattern-Density Effect |
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393 | (2) |
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9.7.2 Effect of Cu-Plating Chemistry and Annealing on Cu-CMP Rates |
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395 | (1) |
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9.7.3 CMP Dishing Response to Different Barrier Metals |
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396 | (1) |
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9.7.4 Electrical Characterization Post CMP |
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397 | (1) |
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9.8 Post-CMP Defect Inspection |
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398 | (5) |
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9.8.1 In-Film Defects Between Cu Seed and ECD Cu |
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399 | (1) |
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400 | (1) |
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401 | (1) |
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9.8.4 Delamination and Arcing Defects |
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402 | (1) |
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403 | (1) |
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404 | (1) |
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404 | (5) |
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10 Temporary and Permanent Bonding |
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409 | (28) |
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10.1 Introduction to Wafer Bonding for TSV Integration |
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409 | (1) |
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10.2 Wafer-to-Wafer Alignment and Bonding for TSV Integration |
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410 | (13) |
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410 | (2) |
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10.2.2 Wafer-to-Wafer Alignment |
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412 | (5) |
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10.2.3 Wafer Bonding for TSV Integration |
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417 | (6) |
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10.3 Comparison of Stacking Schemes: W2W, C2W, and Advanced C2W |
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423 | (4) |
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10.4 Temporary Bonding and Debonding for Thin-Wafer Handling and Processing |
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427 | (6) |
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433 | (4) |
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11 Assembly and Test Aspects of TSV Technology |
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437 | (56) |
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437 | (3) |
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440 | (24) |
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11.2.1 TSV Wafer Finishing |
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440 | (11) |
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451 | (3) |
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11.2.3 Test Strategies for Advanced SiP and 3D/TSV Packages |
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454 | (10) |
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11.3 TSV Logistics and Supply-Chain Issues |
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464 | (7) |
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11.4 TSV Design Considerations for Wafer-Backside Bumping |
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471 | (3) |
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11.5 Thermal Performance of TSV Packages |
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474 | (3) |
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11.6 Reliability Considerations for TSV Packages |
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477 | (4) |
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11.7 Electrical Performance of TSV Packages |
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481 | (7) |
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11.8 Summary and Conclusions |
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488 | (2) |
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490 | (3) |
Index |
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