20 December 2016 Screen-printed nanostructured composites as thermal interface materials for insulated gate bipolar transistors heat dissipation applications
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Abstract
Thermal interface materials (TIMs) are of crucial importance in enhancing heat transfer and minimizing exceedingly high temperatures in high-density electronics. TIMs functionally aim to reduce the microscale crevices by penetrating the gap between the contacting rigid surfaces. We prepared silver nanoparticles (SNPs) and single-wall carbon nanotubes (SWCNTs)-based nanocomposites with graphite nanoplatelets (GNPs) by using a screen printing technique for conformal spreading of SNPs and SWCNTs with various weight-loading ratios on top of a layer containing the GNPs and measured its thermal conductivity and electrical conductivities in both through-plane and in-plane directions. In particular, the 10% SNPs enhanced TIMs showed highly anisotropic behavior in both electrical and thermal conductivities, viz., in-plane electrical conductivity exceeds its through-plane counterpart by three orders of magnitude, the highest in-plane electrical conductivity was 7.85 S/cm, and through-plane electrical conductivity was 0.00287  S/cm. Similarly, anisotropic behavior was found for the in-plane thermal conductivity ∼8.4  W/mK and through-plane thermal conductivity ∼0.35943  W/mK. In addition, scanning electron microscopy (SEM) was performed to reveal the typical morphology and elements’ existence of screen-printed TIMs. The proposed TIMs were put into the actual 15-kW converter to test the thermal management performance.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Tien-Chan Chang, Yiin-Kuen Fuh, Rui-Zhong Lee, Li-Yuan Liu, Yueh-Mu Lee, "Screen-printed nanostructured composites as thermal interface materials for insulated gate bipolar transistors heat dissipation applications," Journal of Micro/Nanolithography, MEMS, and MOEMS 15(4), 044503 (20 December 2016). https://doi.org/10.1117/1.JMM.15.4.044503 . Submission: Received: 31 July 2016; Accepted: 28 November 2016
Received: 31 July 2016; Accepted: 28 November 2016; Published: 20 December 2016
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