V044 ISBN-13 978-9V8014-44241-68-7 ISBN,-13 9!778I-9J818-4BV244014--46c8e-7bgih! ,ISBN!7-1I3 J9788-B9841--4c24e1b-6g8-i7h! ,!7IJ8B4-cebgih! 3DIntegration.indd 1 7/13/11 7:53:18 PM 3DIntegration.indd 1 7/13/11 7:53:18 PM 3DIntegration.indd 1 7/13/11 7:53:18 PM August 3,2011 15:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 030811-copyright August 3,2011 15:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 030811-copyright TThhiiss ppaaggee iinntteennttiioonnaallllyy lleefftt bbllaannkk CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2012 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Version Date: 20111012 International Standard Book Number-13: 978-9-81430-382-8 (eBook - PDF) This book contains information obtained from authentic and highly regarded sources. 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Visit the Taylor & Francis Web site at http://www.taylorandfrancis.com and the CRC Press Web site at http://www.crcpress.com July 28,2011 16:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 280711-preface Preface Three-dimensional (3D) integration has emerged as a critical performance enabler for integrated circuits, at a time when the microelectornics industry is faced with unprecedented scaling barriers, which have arisen both due to fundamental physics and economic constraints. 3D integration provides a mechanism for space transformation of the traditional planar implementation of integrated circuits into three-dimensional space. It therefore provides a pathway to extend geometrical scaling for further performance enhancement (“More Moore”), as well as provide functional diversification (“More than Moore”) to improve higher-level system operation. At its core, 3D integration is simply the process of vertically stacking of circuits and forming electrical connections between them. Despite this seemingly simple concept, however, 3D integration involves significant development of many new technologies, from the basic processes and materials issues involved, to new approaches to system architectures, and it is the status and progress in these new areas that provide the focus of this book. The advent of 3D integration is a direct result of relentless research in academia, research laboratories, and industry over the last 10 years. Today, 3D integration exists as a diverse set of stacking and vertical interconnection technologies that can take a multitude of forms, with the precise implementation depending on the applications. At the time of this writing, commercial 3D products already exist, including small form factor image sensors that include through silicon vias (TSV), and several announcements of future products, including 3D memory chips, have been made. The concept of this book on 3D technology dates back to more than two years ago. At that time, an increasing number of publications and conferences had started to focus on 3D integration. At the end of an IEEE-sponsored International Workshop on Next Generation Electronics in Tainan, Taiwan, in November 2008, Pan Stanford Publishing (PSP) identified 3D integration as an important topic for book publication. While a few reference books on this emerging field already existsed, there was an urgent need to highlight more recent developments in a new book and the idea of this book was formed. Given the many varieties of 3D integration technologies and its large span in the semiconductor supply chain, we decided to edit a book with contributions from experts in academia, research laboratories, and industry. After careful planning, we identified and invited chapter contribution from an impressive line-up of highly qualified researchers. It took more than one full year for planning, writing, and editing. The objective of this book is to present novel ideas in pre-packaging wafer- level 3D integration technologies. The book covers process technologies such as wafer bonding, through silicon via (TSV), wafer thinning and handling, infrastructures, integration schemes, design as well as providing a succinct July 28,2011 16:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 280711-preface vi Preface outlook. All process technologies are carefully described and potential applications are listed. Technical challenges are also highlighted. This book is particularly beneficial to researchers or engineers who are already working or are beginning to work on 3D technology. This book would not have been possible without a team of highly qualified and dedicated people. We are particularly grateful to Stanford Chong of PSP for initiating this undertaking and for providing his support. Rhamie Wahap and dedicated editorial staff at PSP worked alongside with us and provided us with the necessary editorial support. The three co-editors were funded for many years through the MARCO and DARPA funded Interconnect Focus Center (IFC) as well as the DARPA funded 3D IC Program; our 3D technology platform research, and this book, would not have been possible without this extended research support. C.S. Tan is immensely grateful for the unfailing love and support from his wife, Lee Peng, without whom this book would not have been possible. He is currently supported by a Nanyang Assistant Professorship at the Nanyang Technological University. His research is generously supported by a grant from the Semiconductor Research Corporation (SRC), USA, through a subcontract from the Interconnect and Packaging Center at Georgia Institute of Technology, a seedling fund from Defence Advanced Research Program Agency (DARPA), USA, as well as the Defence Science and Technology Agency (DSTA) in Singapore. K.N. Chen would like to acknowledge funding supports from the National Science Council, Taiwan, as well as 3D IC research supports from the National Chiao Tung University, IBM T.J. Watson Research Center, and Massachusetts Institute of Technology. S. J. Koester is gratefully with support from the University of Minnesota. Last but not least, we are extremely thankful to authors who accepted our invitation and contributed chapters to this book. We hope that the readers will find this book useful in their pursuit of 3D technology. Please do not hesitate to contact us if you have any comments or suggestions. Chuan Seng Tan [email protected] Kuan-Neng ChUeSnA [email protected] Steven J. KoeTasitwearn [email protected] USA May 2011 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in July 28,2011 16:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 280711-preface Contents Preface Contents v vii Chapter 1 3D Integration Technology – Introduction 1 Chuan Seng Tan, Kuan-Neng Chen and and Overview Steven J. Koester Chapter 2 A Systems Perspective on 3D Integration: 27 Phil Emma and Eren Kursun What is 3D? And What is 3D Good For? Bioh Kim, Thorsten Matthias, Viorel Dragoi, Chapter 3 Wafer Bonding Techniques 43 Markus Wimplinger and Paul Lindner Paul Werbaneth Chapter 4 TSV Etching 71 Arthur Keigler Chapter 5 TSV Filling 91 Chapter 6 3D Technology Platform: Temporary Bonding 121 Mark Privett and Release Chapter 7 3D Technology Platform: Wafer Thinning, 139 Scott Sullivan Stress Relief, and Thin Wafer Handling Chapter 8 Advanced Die-to-Wafer 3D Integration 153 Takafumi Fukushima, Kang-Wook Lee, Platform: Self-Assembly Technology Tetsu Tanaka and Mitsumasa Koyanagi Paul Enquist Chapter 9 Advanced Direct Bond Technology 175 Chapter 10 Surface Modification Bonding at Low 205 Temperature for Three-Dimensional Akitsu Shigetou Hetero-Integration July 28,2011 16:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 280711-preface viii Contents Chapter 11 Through Silicon Via Implementation in CMOS 231 Xavier Gagnard and Nicolas Hotellier Image Sensor Product Chapter 12 A 300-mm Wafer-Level Three-Dimensional 263 Integration Scheme Using Tungsten Through- Fei Liu Silicon Via and Hybrid Cu-Adhesive Bonding Chapter 13 Power Delivery in 3D IC Technology with a 297 Stratum Having an Array of Monolithic Ron Rutman and Jian Sun DC-DC Point-of-Load (PoL) Converter Cells Xiaoxia Wu, Yuan Xie and Vijaykirshnan Chapter 14 Thermal-Aware 3D IC Designs 313 Narayanan Chapter 15 3D IC Design Automation Considering 335 Hao Yu and Xiwei Huang Dynamic Power and Thermal Integrity Ya Lan Yang Chapter 16 Outlook 351 Index 367 July 28,2011 16:00 RPS:Pan Stanford Publishing Book - 6.5in x 9.75in 280711-ch01 Chapter 1 3D INTEGRATION TECHNOLOGY – INTRODUCTION AND OVERVIEW Chuan Seng Tan Nanyang Technological University Steven J. Koester University of Minnesota Kuan-Neng Chen National Chiao Tung University 1.1 INTRODUCTION The past decade has seen three-dimensional (3D) integration technology mature rapidly from a hypothetical concept to a technology that is on the cusp widespread commercial implementation. This rapid trend towards acceptance of 3D integration has been both a result of key demonstrations of the technical feasibility of the process, as well as a growing consensus that 3D integration will be necessary to continue current computational system performance trends. 3D technology also offers an abundance of opportunities for new applications and functionality. In this introduction, we provide an overview of the system needs that are driving 3D integration development, the recent advances in the underlying technology that have been key to its recent acceptance, and new opportunities for additional functionality that 33DD I nhteagsr attihoen pfoor tVeLnSIt Siayslt etom sprovide. Edited by Chuan Seng Tan, Kuan-Neng Chen and Steven J. Koester Copyright © 2012 by Pan Stanford Publishing Pte. Ltd. www.panstanford.com