FDTR imaging of thermal conductivity distribution in a thermal interface material (TIM) (IMAGE)
Caption
FDTR imaging reveals heterogeneous thermal conductivity distribution in a thermal interface material (TIM). The scanning FDTR mapping (left) visualizes the spatial variation of thermal conductivity across the sample, with high-k regions (red/yellow) corresponding to filler-rich domains and low-k regions (blue) corresponding to trapped air or matrix-dominated areas. The right panel shows the fitting process of frequency-domain thermoreflectance (FDTR) data, enabling quantitative extraction of local thermal properties. The scale bars indicate X and Y dimensions, and the color bar represents thermal conductivity values in W·m⁻¹·K⁻¹.
Credit
© Yuhan Yao, Haobo Yang, Ronggui Yang*, Xin Qian* 2026. This is an Open Access article licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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License
CC BY