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Foreword | |
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Preface | |
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Acknowledgments | |
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Nanotechnology and 3D Integration for the Semiconductor Industry | |
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Introduction | |
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Nanotechnology | |
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Origin of Nanotechnology | |
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Important Milestones of Nanotechnology | |
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Why Graphene Is So Exciting and Could Be Very Important for the Electronics Industry | |
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Outlook of Nanotechnology | |
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Moore's Law: Nanotechnology for the Electronics Industry | |
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Three-Dimensional Integration | |
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Through-Silicon Via Technology | |
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Origin of 3D Integration | |
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Challenges and Outlook of 3D Si Integration | |
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3D Si Integration | |
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3D Si Integration Bonding Assembly | |
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3D Si Integration Challenges | |
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3D Si Integration Outlooks | |
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Potential Applications and Challenges of 3D IC Integration | |
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Definition of 3D IC Integration | |
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Future Requirements of Mobile Products | |
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Definition of Bandwidth and Wide I/O | |
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Memory Bandwidth | |
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Memory-Chip Stacking | |
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Wide I/O Memory | |
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Wide I/O DRAM | |
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Wide I/O Interface | |
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2.5D and 3D IC Integration (Passive and Active Interposers) | |
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Recent Advances of 2.5D IC Integration (Interposers) | |
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Interposer Used as Intermediate Substrate | |
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Interposer Used as a Stress-Relief (Reliability) Buffer | |
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Interposer Used as Carrier | |
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Interposer Used as a Thermal Management Tool | |
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New Trends in TSV Passive Interposers for 3D IC Integration | |
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Interposer (with a Cavity) Supporting High-Power Chips on Its Top Side and Low-Power Chips on Its Bottom Side | |
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Interposer (on an Organic Substrate with a Cavity) Supporting High-Power Chips on Its Top Side and Low-Power Chip Stacking on Its Bottom Side | |
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A Simple Design Example | |
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Interposer (on an Organic Substrate with a Cavity) Supporting High-Power Chips on the Top Side and Low-Power Chips (with Heat Slug/Spreader) on the Bottom Side | |
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Ultralow-Cost Interposer for 3D IC Integration | |
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Interposer Used as a Thermal Management Tool for 3D IC Integration | |
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Interposer with Embedded Fluidic Microchannels for 3D Light-Ermtting Diode and IC Integration SiP | |
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Embedded 3D IC Integration | |
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Semiembedded Interposer with Stress-Relief Gap | |
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Embedded 3D Hybrid IC Integration for Optoelectronic Interconnects | |
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Summary and Recommendations | |
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TSV Patents | |
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References | |
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General Readings | |
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TSV and 3D Integration and Reliability | |
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3D MEMS and IC Integration | |
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Semiconductor IC Packaging | |
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Through-Silicon Via Technology | |
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Introduction | |
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Who Invented TSV and When | |
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High-Volume Products with TSV Technology | |
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Via Forming | |
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DRD3 versus Laser Drilling | |
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Tapered Via by DRIE | |
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Straight Via by DPIE | |
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Dielectric Isolation Layer (Oxide Liner) Deposition | |
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Tapered Oxide Liner by Thermal Oxidation | |
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Tapered Oxide Liner by PECVD | |
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DoE for Straight Oxide Liner by PECVD | |
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DoE Results for Straight Oxide Liner by PECVD | |
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Summary and Recommendations | |
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Barrier (Adhesion) Layer and Seed (Metal) Layer Deposition | |
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Tapered TSV with Ti Barrier Layer and Cu Seed Layer | |
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Straight TSV with Ta Barrier Layer and Cu Seed Layer | |
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Straight TSV with Ta Barrier Layer Experiments and Results | |
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Straight TSV with Cu Seed Layer Experiments and Results | |
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Summary and Recommendations | |
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TSV Filling by Cu Plating | |
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Cu Plating to Fill Tapered TSVs | |
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Cu Plating to Fill Straight TSVs | |
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Leakage Current Test of Blind Straight TSVs | |
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Summary and Recommendations | |
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Chemical-Mechanical Polishing of Cu Plating Residues | |
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CMP for Tapered TSVs | |
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CMP for Straight TSVs | |
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Summary and Recommendations | |
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TSVCu Reveal | |
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TSVCu Reveal by CMP (Wet Process) | |
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Cu Reveal by Dry Etching Process | |
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Summary and Recommendation | |
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FEOL and BEOL | |
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TSV Processes | |
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Via-Before Bonding Process | |
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Via-After Bonding Process | |
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Via-First Process | |
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Via-Middle Process | |
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Via-Last (From the Front Side) Process | |
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Via-Last (From the Backside) Process | |
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How About the Passive Interposers? | |
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Summary and Recommendations | |
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References | |
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Through-Silicon Vias: Mechanical, Thermal, and Electrical Behaviors | |
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Introduction | |
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Mechanical Behavior, of TSVs in System-in-Package | |
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Mechanical Behavior of TSVs for Active/Passive Interposers | |
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DFR Results | |
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TSVs with a Redistribution Layer | |
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Summary and Recommendations | |
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Mechanical Behavior of TSVs in Memory-Chip Stacking | |
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Boundary-Value Problem | |
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Nonlinear Thermal Stress Analyses for TSVs | |
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Modified Virtual Crack-Closure Technique | |
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Energy Release Rate Estimation for TSVs | |
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Parametric Study of Energy Release Rate for TSVs | |
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Summary and Recommendations | |
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Thermal Behaviors of TSVs | |
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Equivalent Thermal Conductivity of TSV Chip/Interposer | |
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Effect of TSV Pitch on Equivalent Thermal Conductivity of Chip/Interposer | |
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Effect of TSV Filler on Equivalent Thermal Conductivity of Chip/Interposer | |
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Effect of Plating Thickness of a Partially Cu-Filled TSV Interposer /Chip on the Equivalent Thermal Conductivity | |
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More Accurate Models | |
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Summary and Recommendations | |
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Electrical Modeling of TSVs | |
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Definition | |
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The Model and Equations | |
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Summary and Recommendations | |
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Electrical Test of Blind TSVs | |
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Motivation | |
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Testing Principle and Apparatus | |
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Experimental Procedures, Measurements, and Results | |
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Blind TSV Electrical Test Guidelines | |
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Summary and Recommendations | |
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References | |
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Thin-Wafer Strength Measurement | |
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Introduction | |
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Piezoresistive Stress Sensors for Thin-Wafer Strength Measurement | |
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Problem Definition | |
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Design and Fabrication of Piezoresistive Stress Sensors | |
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Calibration of Stress Sensors | |
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Stresses in Wafers after Thinning (Back-Grinding) | |
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Stresses in Wafers after Mounting on Dicing Tape | |
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Summary and Recommendations | |
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Effects of Wafer Back-Grinding on the Mechanical Behavior of Cu-Low-k Chips | |
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Problem Definition | |
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Experiments | |
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Results and Discussion | |
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Summary and Recommendations | |
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References | |
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Thin-Wafer Handling | |
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Introduction | |
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Wafer Thinning and Thin-Wafer Handling | |
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Adhesive Is the Key | |
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Thin-Wafer Handling Issues and Potential Solutions | |
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Thin-Wafer Handling of 200-mm Wafers | |
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Thin-Wafer Handling of 300-mm Wafers | |
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Effect of Dicing Tape on Thin-Wafer Handling of Wafers with Cu/Au Pads | |
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Effect of Dicing Tape on Thin-Wafer Handling of Wafers with Cu-Ni-Au UBMs | |
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Effect of Dicing Tape on Thin-Wafer Handling of Interposer with RDLs and Ordinary Solder Bumps | |
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Materials and Equipments for Thin-Wafer Handling | |
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Adhesive and Process Guidelines for Thin-Water Handling | |
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Some Requirements for Selecting Adhesives | |
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Some Process Guideline for Thin-Wafer Handling | |
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Summary and Recommendations | |
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3M Wafer Support System | |
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EVG's Temporary Bonding and Debonding System | |
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Temporary Bonding | |
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Debonding | |
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Thin-Wafer Handling with Carrierless Technology | |
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The Idea | |
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The Design and Process | |
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Summary and Recommendations | |
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References | |
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Microbumping, Assembly, and Reliability | |
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Introduction | |
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Can we Apply the Wafer Bumping Method of Ordinary Solder Bumps to Solder Microbumps? | |
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Problem Definition | |
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Electroplating Method for Wafer Bumping of Ordinary Solder Bumps | |
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Assembly of 3D IC Integration SiPs | |
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Electroplating Method for Wafer Bumping of Solder Microbumps | |
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Test Vehicle | |
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Wafer Microbumping of the Test Wafer by Conformal Cu Plating and Electroplating Sn | |
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Wafer Microbumping of the Test Wafer by Nonconf ormal Cu Plating and Electroplating of Sn | |
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Can We Apply the Same Parameters of the Electroplating Method for Ordinary Solder Bumps to Microbumps? | |
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Summary and Recommendations | |
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Wafer Bumping, Assembly, and Reliability Assessments of Ultrafine-Pitch Solder Microbumps | |
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Lead-Free Fine-Pitch Solder Microbumping | |
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Test Vehicle | |
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Microbump Fabrication | |
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Characterization of Microbumps | |
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Lead-Free Fine-Pitch C2C Solder Microbump Assembly | |
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Assembly, Characterization, and Reliability-Assessment Methods | |
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Assembly Process (C2C Natural Reflow) | |
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Characterization of C2C Reflow Assembly Results | |
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Assembly Process (C2C Thermocompression Bonding) | |
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Characterization of C2C TCB Assembly Results | |
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Reliability Assessments of Assemblies | |
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Wafer Bumping of Lead-Free Ultrafine-Pitch Solder Microbumps | |
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Test Vehicle | |
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Microbump Fabrication | |
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Characterization of Ultrafine-Pitch Microbumps | |
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Conclusions and Recommendations | |
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References | |
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Microbump Electromigration | |
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Introduction | |
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Solder Micro-joints with Larger Solder Volumes and Pitch | |
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Test Vehicles and Methods | |
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Test Procedures | |
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Microstructures of Samples Before Tests | |
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Samples Tested at 140�C with Low Current Density | |
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Samples Tested at 140�C with High Current Density | |
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Failure Mechanism of the Multiphase Solder-Joint Interconnect | |
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Summary and Recommendations | |
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Solder Microjoints with Smaller Volumes and Pitches | |
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Experimental Setup and Procedure | |
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Results and Discussion | |
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Summary and Recommendations | |
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References | |
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Transient Liquid-Phase Bonding: Chip-to-Chip, Chip-to-Wafer, and Water-to-Wafer | |
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Introduction | |
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How Does Low-Temperature Bonding with Solder Work? | |
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Low-Temperature C2C [(SiO<sub>2</sub>/Si<sub>3</sub>N<sub>4</sub>/Ti/Cu) to (SiO<sub>2</sub>/Si<sub>3</sub>N<sub>4</sub>/Ti/Cu/In/Sn/Au)] Bonding | |
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Test Vehicle | |
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Pull-Test Results | |
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X-Ray Diffraction and Transmission Electron Microscope Observations | |
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Low-Temperature C2C [(SiO<sub>2</sub>/Ti/Cu/Au/Sn/In/Sn/Au) to (SiO<sub>2</sub>/Ti/Cu/Sn/In/Sn/Au)] Bonding | |
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Test Vehicle | |
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Qualification Test Results | |
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Low-Temperature C2W [(SiO<sub>2</sub>/Ti/Au/Sn/In/Au) to (SiO<sub>2</sub>/Ti/Au)] Bonding | |
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Solder Design | |
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Test Vehicle | |
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3D IC Chip Stacking with InSnAu Low-Temperature Bonding | |
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SEM, TEM, XDR, and DSC of the InSnAuIMCs | |
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Young's Modulus and Hardness of the InSnAu IMCs | |
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Three Reflows of the InSnAu IMCs | |
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Shear Strength of the InSnAu IMCs | |
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Electrical Resistance of the InSnAu IMCs | |
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When Does the InSnAu IMC Become Unstable? | |
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Summary and Recommendations | |
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Low-Temperature W2W [TiCuTiAu to TiCuTiAuSnlnSrunAu] Bonding | |
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Test Vehicle | |
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Test Vehicle Fabrication | |
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Low-Temperature W2W Bonding | |
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C-SAM Inspection | |
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Microstructure by SEM/EDX/ FIB/TEM | |
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Helium Leak-Rate Test and Results | |
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Reliability Tests and Results | |
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Summary and Recommendations | |
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References | |
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Thermal Management of Three-Dimensional Integrated Circuit Integration | |
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Introduction | |
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Effects of TSV Interposer on Thermal Performance of 3D Integration SiPs | |
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Geometry and Thermal Properties of Materials for Package Modeling | |
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Effect of TSV Interposer on Package Thermal Resistance | |
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Effect of Chip Power | |
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Effect of Interposer Size | |
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Effect of TSV Interposer Thickness | |
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Effect of Moore's Law Chip Size | |
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Thermal Performance of 3D Memory-Chip Stacking | |
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Thermal Performance of 3D Stacked TSV Chips with a Uniform Heat Source | |
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Thermal Performance of 3D Stacked TSV Chips with a Nonuniform Heat Source | |
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Two TSV Chips (Each with One Distinct Heat Source) | |
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Two TSV Chips (Each with Two Distinct Heat Sources) | |
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Two TSV Chips with Two Staggered Distinct Heat Sources | |
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Effect of Thickness of the TSV Chip on Its Hot-Spot Temperature | |
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Summary and Recommendations | |
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Thermal Management System with TSVs and Microchannels for 3D Integration SiPs | |
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Test Vehicle | |
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Test Vehicle Fabrication | |
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Wafer-to-Wafer Bonding | |
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Thermal and Electrical Performance | |
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Quality and Reliability | |
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Summary and Recommendations | |
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References | |
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Three-Dimensional Integrated Circuit Packaging | |
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Introduction | |
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Cost: TSV Technology versus Wire-Bonding Technology | |
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Wire Bonding of Stack Dies on Cu-Low-fc Chips | |
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Test Vehicles | |
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Stresses at the Cu-Low-fc Pads | |
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Assembly and Process | |
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Summary and Recommendations | |
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Bare Chip-to-Chip and Face-to-Face Interconnects | |
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3D IC Packaging with AuSn Interconnects | |
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Test Vehicle and Fabrication | |
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Chip-to-Wafer Assembly | |
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C2W Design of Experiments (DoE) | |
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Reliability Tests and Results | |
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3D IC Packaging with SnAg Interconnects | |
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Summary and Recommendations | |
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Low-Cost, High-Performance, and High-Density SiPs with Face-to-Face Interconnects | |
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Cu Wire-Interconnect Technology for Moore's Law Chips with Ultrafine-PitchCu-Low-k Pads | |
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Reliability Assessment of Ultrafine-Pitch Cu-Low-k Pads with Cu WIT | |
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A Few New Design Proposals | |
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Fan-Out-Embedded WLP-to-Chip (Face-to-Face) Interconnects | |
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2DeWLP/RCP | |
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3DeWLP/RCP | |
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Summary and Recommendation | |
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A Note on Wire-Bonding Reliability | |
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Common Chip-Level Interconnects | |
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Boundary-Value Problem | |
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Numerical Results | |
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Experimental Results | |
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More Results on Cu Wires | |
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Results on Au Wires | |
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Stress-Strain Relationship of Cu and Au Wires | |
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Summary arid Recommendations | |
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References | |
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Future Trends of 3D Integration | |
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Introduction | |
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The Trend of 3D Si Integration | |
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The Trend of 3D IC Integration | |
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References | |
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Index | |