United States

In recent days, 2.5D package designs have gained popularity with an increasing number of heterogeneous chiplets integrated into advanced system-in-packages. RDL wires become longer and denser, presenting a growing impact on system performance, reliability, and integrity. At present, there exists no standard CAD flow that can design, analyze, and optimize a complete heterogeneous 2.5D system. The traditional die-by-die design approach processes each component independently during extraction and optimization and cannot be applied to heterogeneous systems without fundamental changes in standard CAD tools. Not only the chiplet-package extraction is inaccurate between the die-package interface ignoring all RDL capacitive and inductive impacts, but traditional CAD tools are also unable to perform cross-boundary design optimization. 
We present a complete chiplet-package co-optimization flow for both homogeneous and heterogeneous 2.5D designs. It encompasses 2.5D-aware partitioning, chiplet-package co-planning, holistic and in-context extraction, package inductance consideration, and iterative optimization, along with design analysis and verification of the entire 2.5D system. For homogeneous 2.5D packages, the performance gap to the reference 2D design reduces by 62.5% with our holistic flow. Targeting heterogeneous systems, our in-context design flow achieves less than 1% extraction error on ground and coupling capacitance with comparable design performance.  We further validated our design flow with a design tape-out in TSMC 65nm.

https://underline.io/speakers/59516-yarui-peng

NSF Workshop on Micro/Nano Circuits and Systems Design

Design, Extraction, and Optimization of Multi-Chip Fan-Out Wafer-Level-Packaging for Low-Power Heterogeneous Systems

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INTERMAG 2021

poster

 Electronic design and design automation (EDA) is a key enabling technology in the advancement of information processing that we are enjoying today. EDA has provided fundamental design principles and tools empowering the exponential growth of the number of transistors on an integrated circuit chip over the past 50 years. Without EDA, it would not have been possible for billion-transistor chips to be a reality! 

After five decades of growth, the field of EDA now faces some unique challenges. On one hand, we are approaching the physical limit of transistor scaling, and the golden days of exponential growth in transistor density are over. The exorbitant cost of integrated circuit fabrication and the excessive complexity of EDA tools make it difficult to bring design automation innovations to practice. On the other hand, the recent rise of machine learning and artificial intelligence applications and emerging architectures and technologies calls for more customized solutions to designing electronic systems. 

## **Objectives of the Workshop:**

This workshop, funded by the National Science Foundation (NSF), will assemble a diverse group of leading researchers from both academia and industry to identify future research directions in design and design automation of electronic systems and architectures in response to the challenges and opportunities. It will feature plenary talks and panels as well as roundtable discussions. Collectively, the workshop attendees will explore answers to overarching questions such as 

•	what are the high-risk and high-return research topics, 

•	what other fields adjacent to EDA research should be aggressively pursued for highly interdisciplinary collaboration, and

•	where the research funding should come from and how it should be distributed to encourage more transformative research. 

The workshop will also include a satellite event with a roundtable panel discussion on strategies to improve foundry access to US-based EDA researchers. A final report, based on the deliberations of the workshop, will be produced to the government recommending future research directions.


EDA tools and methodologies

Foundational technologies

The goal of this project is to study the multiphysics, multilevel, multiscale stack of modeling, analysis and optimization from on-chip timing to system reliability under thermal cycling, and develop tools to support system analysis and optimization across this stack. Several recent highlights are presented in the poster.

https://underline.io/speakers/59611-andrew-kahng

SHF: Medium: Closing Multiphysics Analysis Gaps in System Design

This poster introduces a proposed automated design approach for low-cost, turnkey integrated power converters that includes integrated built-in self-test (BIST) to increase the occurrences of first-pass design success. This automation could bridge the gap between the conflicting needs for rapid design cycles and high-performance power electronics seen in applications such as mobile handsets, IoT, and wearables. The goal is to enable rapid design of low-to-medium power converters by developing an automated design platform. By using the BIST monitoring data to update the statistical models used during the design phase, multiple design development cycles could be eliminated and the design risk and non-recurring cost (NRE) could be significantly reduced. It is expected that these closed-loop systems would be successfully automated through creation of analytical models of power converter architectures, development of a circuit component design library and a circuit simulation methodology for collecting a representative subset of design parameters that will correlate to the relevant performance space, creation of statistical models and data that can be used to fit to geometric programming (GP) and support vector machine (SVM) algorithms, and development of a computationally efficient and accurate optimization approach. 

https://underline.io/speakers/59509-jennifer-kitchen

Design Automation Approach for Integrated Power Electronics

In this poster presentation, we present our CAREER project on using 3D integration technology to create a neuromorphic system that is compatible with current technology while providing high system speed, high density, massively parallel processing, low power consumption, and small design area. We plan to develop a comprehensive research program to address the fundamental scientific issues and advanced design challenges involved in building a brain-like computing system using 3D ICs. If successful, the resulting technology could fuel potentially disruptive capabilities in real-time data analysis, time-series predictions, environmental perception for autonomous operations, and dynamic control systems. This technology could also improve the performance of current and future systems by significantly decreasing power, size, and weight budgets, and by enabling embedded and retrofit applications on legacy, mobile, and remote platforms.

https://underline.io/speakers/59612-cindy-yang-yi

Enabling Brain-like Computing through 3D Neuromorphic Circuits and Systems

We present the Chipyard framework, an integrated SoC design, simulation, and implementation framework for specialized compute systems.  Chipyard includes configurable, composable, open-source and generator-based IP blocks that can be used across multiple stages of of the hardware and software development flows, while maintaining design intent and integration consistency.  Through cloud-hosted FPGA-accelerated simulation and rapid ASIC implementation, Chipyard enables continuous validation of physically realizable customized systems.  SoC instances produced from Chipyard have been silicon-verified in TSMC 16nm and Intel 22nm technologies.

https://underline.io/speakers/59613-borivoje-nikolic

Design, Extraction, and Optimization of Multi-Chip Fan-Out Wafer-Level-Packaging for Low-Power Heterogeneous Systems

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