EDAPS 2020 Tutorials & Invited Speakers

Tutorial I:

Design and Analysis of Chiplet Interfaces for Heterogeneous Systems

Speaker: Wendem Beyene

Abstract - Chipet interface allows multiple silicon dies of various technology and complexity to communicate efficiently using wider parallel buses in a single package. The second layer of interconnect on the package (silicon or organic interposer) provides dense channels as well as low impedance power delivery paths between multiple independent power domains. Although the channels are very short and the I/O power can be reduced by order of magnitude, the huge increase in the transient current in multiple dies and the unique clocking architecture makes the supply noise and timing jitter the limiting factors in designing high- performance multi-die systems. The talk discusses the unique signal and power integrity challenges of chiplet interfaces.

Wendem T. Beyene received his B.S. and M.S. degrees in Electrical Engineering from Columbia University, New York, NY and his Ph.D. degree in Electrical and Computer Engineering from University of Illinois at Urbana-Champaign, IL. In the past, he was employed by IBM, Hewlett-Packard, Agilent Technologies and Rambus Inc. He also worked as a principal Engineer with Intel Corp. managing a team working on modeling and analysis of power delivery and signaling systems of digital core and mixed-signal I/O subsystems of FPGA chips. He is an elected Associate Fellow of Ethiopian Academy of Sciences, and recently has been selected as a distinguished lecturer for IEEE Electronic Packaging Society.

Tutorial II:

Passive and Active EMI filters for Power Electronics

Speaker: Jingook Kim

Abstract - Modern power electronics has become very popular in last decades. Almost all modern electronic products use power electronics. A power electronics system generates significant electromagnetic interference (EMI). The passive EMI filters for reduction of conducted emissions become costly and bulky in a high-power electronic system. Active EMI filter techniques are introduced to reduce the size, cost, and heat of EMI filters in a high power application.

Jingook Kim received the B.S., M.S., and Ph.D. degrees in electrical engineering from Korea Advanced Institute of Science and Technology, Daejon, Korea, in 2000, 2002, and 2006, respectively. From 2006 to 2008, he was with DRAM design team in Memory Division of Samsung Electronics, Hwasung, Korea, as a senior engineer. From January 2009 to July 2011, he worked with the EMC Laboratory at the Missouri University of Science and Technology, Missouri, USA, as a postdoc fellow. In July 2011, he joined the Ulsan National Institute of Science and Technology (UNIST), Ulsan, Korea, where he is currently a professor. His current research interests include electromagnetic compatibility, electrostatic discharge, and analog circuit design.

Sangyeong Jeong received the B.S. degree in electrical engineering from the Ulsan National Institute of Science and Technology, Ulsan, South Korea, in 2015, where he recently passed the dissertation defense for Ph. D. degree. His current research interests include electromagnetic compatibility (EMC) problems in the power system and the noise reduction techniques by using integrated circuits (ICs).

Tutorial III:

Recent Advances in PCB Material Characterization

Speakers: Jayaprakash Balachandran and Ching-Chao Huang

Abstract - Heterogeneous computing is accelerating signaling change from NRZ to PAM4 and leading-edge systems implement IO rates that exceed 112Gbps. To properly design these systems, it is of utmost importance to characterize such PCB material property as dielectric constant (DK), dissipation factor (DF) and surface roughness. This tutorial discusses several conventional methods and proposes a new method for better simulation vs. measurement correlation. The proposed method extracts S parameters of 4-port differential traces by impedance-corrected de-embedding and then matches all IL, RL, NEXT, FEXT and TDR/TDT by a 2D solver. The created models can be used for what-if analysis with width/spacing/thickness variation. In addition, these derived model parameters can be used in 3D EM solvers to simulate such complex structures as vias and BGA breakouts. Little attention was given to FEXT in the past. This tutorial shows that both magnitude and phase of FEXT have significant impact on the extracted DK values. Additional findings to be discussed include how the geometric model, return loss and skew affect the extracted material property. Finally, it is shown that an automated PCB extraction framework can be deployed in large-scale manufacturing for quality control and to aid material selection during the system design stage.

Jayaprakash Balachandran (JP) is with Unified Compute Server (UCS) Group at Cisco Systems Inc. JP has over 16 years of experience in high-speed design and has a PhD from KUL/IMEC Belgium. He has many peer reviewed publications and leading PoC workstream in OCP/ODSA.

Ching-Chao Huang, president of AtaiTec Corporation, has more than 30 years of high-speed design and SI software development experience. He was advisory engineer at IBM, R&D manager at TMA, SI manager at Rambus, and Sr. VP at Optimal. Dr. Huang is an IEEE senior member and he pioneered In-Situ De-embedding (ISD) for causal and accurate de-embedding. He received his BSEE from National Taiwan University and MSEE and PhD from Ohio State University.

Tutorial IV:

Implications of Thermal Aspects on Interconnect and Packaging Technology - An Electro-Thermal Co-Design Perspective

Speakers: Surila Guglani, Rahul Kumar, Sourajeet Roy and Rohit Sharma

Abstract With the ever-increasing density of components on a chip, package, and board combined with the decreasing power budgets of modern electronic products, thermal losses and heat management have emerged as highly relevant design and reliability issues. This means that it is no longer enough for circuit designers to consider only the electrical behavior of interconnects and advanced packaging structures - rather the interplay between electrical performance, heat generation and losses, and power distribution needs to be taken into account. Therefore, a holistic approach towards packaging design has to be adopted.
In the first part of this tutorial, we will perform a qualitative examination of the impact of thermal losses and temperature variability on the electrical behavior of both conventional copper-based interconnects as well as emerging copper-graphene hybrid interconnects and purely graphene-based interconnects. In particular, the impacts of thermal effects will be studied both from the self-heating perspective (where the structure itself is the source of heat generation) as well as the external heating perspective (where external circuits lead to heat generation). This section will culminate in our exploration of how the thermal effects play a role in the overall reliability and mean time to failure of interconnects. In the second part of the tutorial, we will look as standard as well as emergent simulation techniques to statistically model the impact of thermal variability on the signal integrity performance of distributed interconnects. Roadblocks facing existing simulation techniques will be discussed followed by a brief assessment of very novel and cutting-edge simulation techniques for electro-thermal co-design optimization. Finally, the tutorial will end with a look into possible thermal management techniques.

Surila Guglani received the Bachelor's degree in Electronics and Communication Engineering from Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India in 2019. She is currently pursuing a Ph.D. degree in Electronics and Communication Engineering at the Indian Institute of Technology, Roorkee, India. She is a recipient of the Vice Chancellor's Gold Medal at the undergraduate level. Her current research interests include electronic design automation for high-speed circuits, uncertainty quantification, predictor-corrector algorithms for polynomial chaos metamodels, modeling and simulation of high-speed interconnects, stochastic modelling of CNT interconnects and machine learning

Rahul Kumar received the bachelor's degree in electronics engineering from Rashtrasant Tukadoji Maharaj (RTM) Nagpur University, Nagpur, India, in 2012, and the MTech. degree in very large-scale integration (VLSI) design and automation techniques from the National Institute of Technology Hamirpur, Hamirpur, India, in 2016. He is currently pursuing the Ph.D. degree in electrical engineering with IIT Ropar, Rupnagar, India. He is a recipient of Visvesvaraya fellowship scheme. His current research interests include the modeling and simulation of copper (Cu)-graphene hybrid on-chip interconnects, signal integrity and application of machine learning in interconnect packaging.

Sourajeet Roy (Member, IEEE) received the B.Tech. degree in electrical engineering from Sikkim Manipal University, Gangtok, India, in 2006, and the M.E.Sc. and Ph.D. degrees in electrical engineering from the University of Western Ontario, London, ON, Canada, in 2009 and 2013, respectively. From 2013 to 2019, he was an Assistant Professor with the Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO, USA. Since 2019, he has been an Assistant Professor with the Department of Electrical and Communications Engineering, IIT Roorkee, Roorkee, India. His current research interests include signal and power integrity analysis of integrated circuits, machine learning-based electronic design automation (EDA) of electronic packaging, and uncertainty quantification of microwave/RF circuits. Dr. Roy is a member of the Technical Program Committee for the IEEE Electrical Performance of Electronic Packaging and Integrated Systems Conference and the IEEE Workshop on Signal and Power Integrity. He was a recipient of the Vice-Chancellors Gold Medal at the undergraduate level in 2006, the Queen Elizabeth II Graduate Scholarship in Science and Technology in 2012, and the Ontario Graduate Scholarship in 2012. His student has received the Best Poster Paper Award at the 23rd IEEE Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS) in 2014. He currently serves as a reviewer for various IEEE transaction journals. He is currently an Associate Editor of the IEEE Transactions on Components, Packaging, and Manufacturing Technology

Rohit Sharma received the B.E. degree in electronics and telecommunication engineering from North Maharashtra University, India, in 2000, the M. Tech. degree in systems engineering from Dayalbagh Educational Institutes, India, in 2003 and the Ph.D. degree in electronics and communication engineering from Jaypee University of Information Technology, India, in 2009. He worked as a Post-Doctoral Fellow at the Design Automation Lab at Seoul National University, Seoul, Korea from Jan 2010 to Dec 2010. He was a Post-Doctoral Fellow at the Interconnect Focus Centre at Georgia Institute of Technology, Atlanta, USA from Jan 2011 to Jun 2012. Dr. Sharma joined the department of electrical engineering at the Indian Institute of Technology Ropar in 2012, where he is currently an Associate Professor. All along his tenure at IIT Ropar, he has initiated activities in the area of Electronic Packaging. His current research interests include design of high-speed chip-chip and on-chip interconnects, Graphene based nanoelectronic devices and interconnects, Signal and Thermal integrity in high-speed interconnects and 3D ICs/packages and application of Machine Learning in advanced packaging and systems. He is also the coordinator of the Indo-Taiwan Joint Research Centre on Artificial Intelligence and Machine Learning at IIT Ropar. He is an Associate Editor of the IEEE Transactions on Components, Packaging and Manufacturing Technology and a Program Committee member in IEEE EPEPS and IEEE EDAPS. He has been the General Co-Chair of the IEEE EDAPS in 2018. He is the Co-Chair of the IEEE EPS Technical Committee on Electrical Design, Modeling, and Simulation and is a Senior Member of the IEEE.