Graphene is a promising candidate material for thermal management of high-power electronics owing to its high intrinsic thermal conductivity. Here we report preliminary results of the proof-of-concept demonstration of graphene lateral heat spreaders. Graphene flakes were transferred on top of GaN devices through the mechanical exfoliation method. The temperature rise in the GaN device channels was monitored in-situ using micro-Raman spectroscopy. The local temperature was measured from the shift in the Raman peak positions. By comparing Raman spectra of GaN devices with and without graphene heat spreader, we demonstrated that graphene lateral heat spreaders effectively reduced the local temperature by ~ 20°C for a given dissipated power density. Numerical simulation of heat dissipation in the considered device structures gave results consistent with the experimental data.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Tax calculation will be finalised during checkout.
A. Balandin, S. Goash, W. Z. Bao, I. Calizo, D. Teweldebrhan. F. Miao and C. N. Lau, Nano Lett. 8, 902 (2008)
S. Ghosh, W. Z. Bao, D. L. Nika, S. Subrina, E. P. Pokatilov, C. N. Lau and A. A. Balandin, Nature Materials 9, 555 (2010)
D. J. Chen, B. Shen, X. L. Wu, J. C. Shen, F. J. Xu, K. X. Zhang, R. Zhang, R. L. Jiang, Y. Shi and Y. D .Zheng, Appl. Phys. A 80, 1729 (2005)
S. Subrina, D. Kotchetkov and A. A. Balandin, Electron Dev. Lett., 30, 1281(2009)
M. A. Khan, X. Hu, A. Tarakji, G. Simin, J. Yang, R. Gaska and M. S. Shur, Appl. Phy. Lett. 77, 1339 (2000)
G. Simin, X. Hu, N. Ilinskaya, J. Zhang, A. Tarakji, A. Kumar, J. Yang, M. Asif Khan, R. Gaska and M. S. Shur, IEEE Electron. Dev. Lett. 22, 53 (2001)
M. Kuball, J. M. Hayes, M, J. Uren, T. Martin, J. C. H. Birbeck, R. S. Balmer and B. T. Hughes, IEEE Electron. Dev. Lett. 23, 7 (2002)
A. Sarua, H. Ji, M. Kuball, M. J. Uren, T. Martin, K. P. Hilton and R. S. Balmer, IEEE Trans. Electron Dev. 53, 2438 (2006)
About this article
Cite this article
Yan, Z., Liu, G., Khan, J. et al. Experimental Demonstration of Thermal Management of High-Power GaN Transistors with Graphene Lateral Heat Spreaders. MRS Online Proceedings Library 1344, 305 (2011). https://doi.org/10.1557/opl.2011.1348