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Thermal Design of a Hierarchical Radially Expanding Cavity for Two-Phase Cooling of Integrated Circuits

[+] Author Affiliations
Arvind Sridhar, Chin Lee Ong, Stefan Paredes, Bruno Michel, Thomas Brunschwiler

IBM Research Zürich, Rüschlikon, Switzerland

Pritish Parida, Evan Colgan, Timothy Chainer

IBM T J Watson Research Center, Yorktown Heights, NY

Catherine Gorle, Kenneth E. Goodson

Stanford University, Stanford, CA

Paper No. IPACK2015-48690, pp. V001T09A039; 10 pages
  • ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels
  • Volume 1: Thermal Management
  • San Francisco, California, USA, July 6–9, 2015
  • Conference Sponsors: Electronic and Photonic Packaging Division
  • ISBN: 978-0-7918-5688-8
  • Copyright © 2015 by ASME


A major challenge in the implementation of evaporative two-phase liquid-cooled ICs with embedded fluid microchannels/cavities is the high pressure drops arising from evaporation-induced expansion and acceleration of the flowing two-phase fluid in small hydraulic diameters. Our ongoing research effort addresses this challenge by utilizing a novel hierarchical radially expanding channel networks with a central embedded inlet manifold and drainage at the periphery of the chip stack. This paper presents a qualitative description of the thermal design process that has been adopted for this radial cavity. The thermal design process first involves construction of a system-level pressure-thermal model for the radial cavity based on both fundamental experiments as well as numerical simulations performed on the building block structures of the final architecture. Finally, this system-level pressure-thermal model can be used to identify the design space and optimize the geometry to maximize thermal performance, while respecting design specifications. This design flow presents a good case study for electrical-thermal co-design of two-phase liquid cooled ICs.

Copyright © 2015 by ASME



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