Researchers at Pacific Northwest National Laboratory and Oregon State University in the United States said that a newly developed nanoscale coating can significantly increase the efficiency of heat dissipation in semiconductors and other devices. "On a nanostructured surface of a 'naked' aluminum substrate, we observed improved thermal conductivity at 10x; on these nanostructured surfaces, it also measured 4x faster critical heat flux." Terry Hendricks, head of the research project at the Pacific National Laboratory, said that he conducted the above study together with Chih-hung Chang, a professor at Legoland State University.

This kind of nano-coating method is called “micro-reactor-assisted nano-material deposition”. It is a kind of zinc oxide micro-particles deposited on aluminum and copper substrates; with the nano-structured coating blessing, heat conduction becomes more efficient. . The researchers said that the coating technology they developed could help the heat dissipation of advanced laser devices, radar or power electronics, and could be used in high-performance computers, military space vehicles, electric vehicles, or renewable energy systems.

The researchers pointed out that nano-scale zinc oxide coatings can increase the coefficient of heat dissipation of copper sheets by a factor of ten. As for the heat dissipation mechanism of MAND technology, it is still under study, but apparently due to the high density of nucleation sites and the better capillary phenomenon, the heat transfer efficiency per surface area unit of these substrates has been improved.

If applied to a forced liquid cooling system with a microchannel architecture, the researchers assumed that its technology could open a critical trade-off between nucleation site densities, allowing the frequency and bubble diameter of liquid bubbles to be optimized, allowing the system to dissipate heat. The effectiveness is maximized.

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