Center to develop new materials, process paradigms for next-generation semiconductors

7/8/2021 Kim Gudeman, HMNTL

ECE Assistant Professor Shaloo Rakheja and Professor Xiuling Li are developing new material and process paradigms for electrical and photonic interconnects and on-chip memory.

Written by Kim Gudeman, HMNTL

Shaloo Rakheja
Shaloo Rakheja

ECE researchers including Assistant Professor Shaloo Rakheja and Professor Xiuling Li, Donald Biggar Willett Professor in Engineering, are working to develop new material and process paradigms for electrical and photonic interconnects and on-chip memory, with the goal of reducing the energy consumption associated with data transportation.

Integrated circuits (ICs), or “chips,” which are the heart of most modern-day electronics, ranging from high-performance computers to smartphones, rely on interconnects to link elements together. Interconnects are wires that serve as the nervous system for the IC, transporting information not only between local components, such as on-chip transistors, but also from chip-to-chip and module-to-module.

As devices grow increasingly smaller, there is greater demand for compact, yet powerful ICs with scaled interconnects that consume very little energy and operate with low latency (or delay). At the same time, big-data applications have exponentially increased the processing load, making interconnects the performance bottleneck and energy hog in today’s chips.

 Through the first stage of an Industry-University Cooperative Research Centers (IUCRC) grant, funded by the National Science Foundation, the team will recruit industry members and map out a strategy for enabling highly energy efficient computing systems – which is imperative for American competitiveness in the microelectronics field.

The new Center for Aggressive Scaling by Advanced Processes for Electronics and Photonics (ASAP-EP) will be housed in UIUC’s Holonyak Micro & Nanotechnology Lab (HMNTL).

“We intend to provide the semiconductor industry with technology, methods, and science so that semiconductors can efficiently operate at the speeds and scales that are needed to create next-generation computing systems at advanced technology nodes,” said Rakheja, the project’s principal investigator.

The Center will focus on developing new processes and materials that lower delay and energy dissipation of interconnects, which are responsible for more than 50% of a chip’s delay and energy consumption. Researchers will find new materials for ultra-thin interconnects at the nanoscale level, bring memory closer to the computer nodes, and identify new connectivity technology at the macroscale level, since spectrum scarcity and limitations of the RF band are likely as more than 80 billion devices are projected to be online by 2024.

Xiuling Li
Xiuling Li

As part of the IUCRC program, the UIUC team will work closely with industry sponsors, who will help in defining the direction of ASAP projects. The program provides the opportunity for students in the center to learn more about industry needs and provides companies with access to tomorrow’s workforce.

“In addition to the technology aspects, the center provides industry sponsors direct access to a large pool of talented, diverse, and well-trained students, who will be pushing the envelope of future technologies in this industry,” said Li who is also the HMNTL interim director.

The ASAP research will utilize new tools recently installed at HMNTL, including a 150kV E-Beam Lithography (EBL) system from Elionix, which has a higher energy capability than any other in North America. This high-precision tool allows researchers and students to print features as small as four nanometers in size.

“The University of Illinois has the right people and tools in place to make major contributions to the microelectronics and semiconductor industry,” said ECE Professor Rashid Bashir, Dean of The Grainger College of Engineering and Abel Bliss Professor of Engineering. “With our rich history of ground-breaking discoveries in microelectronics and working with industry on grand challenges, UIUC is well poised to lead new innovations that will help keep the United States at the forefront of semiconductor technology.” Li is affiliated with the Beckman Institute and HMNTL. Rakheja is affiliated with the CSL and HMNTL.


Read the original article on the HMNTL site.

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This story was published July 8, 2021.