Development and Characterization of Reliable Graphene-based Materials for Lightweight and Efficient Thermal Management in Electronics
Licentiate thesis, 2024
High-performance graphene-based thermal management products are already commercialized today. Products like thermal interface materials (TIMs) and heat spreaders are still novel, and some knowledge gaps exist. More understanding of these products regarding reliability, aging properties and how to optimize production processes can enable them on a broader market. Further, it is believed that graphene-based materials can replace more conventional metals in applications where they have not been used before.
In this thesis, the thermal conductivity and heat dissipation capacity of a graphene-assembled film heat spreader has been shown to be improved by a newly developed annealing process. The effect of the annealing process was demonstrated in a thermal test rig where a high-power light emitting diode (LED) was used as a hot spot while the temperature was monitored with an infrared (IR) camera.
Furthermore, a vertically aligned graphene-based TIM was tested with a new test method to gain a better understanding of the long-term reliability and aging properties. The TIM was subjected to thermal aging, thermal cycling and damp heat while regularly measuring the thermal resistance to see how the performance changes with time. Generally, it could be seen that the thermal resistance was stable, a result that paves way for this type of TIM to be used in applications with a need for high performance over a long time.
Additionally, a literature study on nano-enhanced wick structures was carried out to help determine the most promising nanomaterial-based wick to be used in a two-phase heat spreading device called vapor chamber. Lastly, prototypes of a novel graphene-enhanced vapor chamber were built with graphene assembled film as encapsulating material and they were characterized in a custom-made test rig. The lightweight prototype vapor chambers could outperform a conventional copper vapor chamber in terms of mass-based thermal resistance. However, leak tightness, working fluid and the wick structure were identified as three important future design improvements to further enhance performance and reliability.
heat spreader
vapor chamber
thermal management
thermal interface material
wick structure
reliability testing
graphene
Author
Markus Enmark
2D-Tech
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems
Reliability Characterization of Graphene Enhanced Thermal Interface Material for Electronics Cooling Applications
2022 IMAPS Nordic Conference on Microelectronics Packaging, NordPac 2022,;(2022)
Paper in proceeding
A Critical Assessment of Nano Enhanced Vapor Chamber Wick Structures for Electronics Cooling
2021 23rd European Microelectronics and Packaging Conference and Exhibition, EMPC 2021,;(2021)
Paper in proceeding
Enmark, M. Murugesan, M. Zhang, H. Nilsson, T.M.J. Kallio, K.J. Kamal, A. Liu, J. Design and Characterization of a Novel Graphene-enhanced Vapor Chamber for Lightweight and High-performance Electronics Cooling
2D material-based technology for industrial applications (2D-TECH)
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
Driving Forces
Sustainable development
Innovation and entrepreneurship
Areas of Advance
Nanoscience and Nanotechnology
Materials Science
Subject Categories
Materials Engineering
Electrical Engineering, Electronic Engineering, Information Engineering
Nano Technology
Infrastructure
Nanofabrication Laboratory
Technical report MC2 - Department of Microtechnology and Nanoscience, Chalmers University of Technology: 465
Publisher
Chalmers
Kollektorn, Kemivägen 9, Chalmers
Opponent: Prof. Helge Kristiansen, Norwegian University of Science and Technology