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• W4320015767 abstract "Poor intrinsic thermal conductivity (TC) of beta-phase gallium oxide ( <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3) poses challenges to the thermal management of its devices. Various packaging-level cooling strategies have been proposed, demonstrating great thermal benefits. In addition, much attention has been paid to the device-level cooling methods, which have shown remarkable efficiency for the thermal management of many wide and ultrawide bandgap devices. As the device-level thermal management efficiency is highly associated with the device architecture, deep insight into the device architecture effect is highly warranted. Here, we used numerical simulation method to conduct the device-level thermal analysis on <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3 MESFETs. The impacts of various device components on channel temperature are comprehensively investigated, such as metal geometry, layout alignment, thickness, and orientation-dependent <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3 TCs, and the thermal boundary resistance (TBR) between metal and <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3. We show that increasing the gate length from 0.5 to <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$1.5 mu text{m}$ </tex-math></inline-formula> achieves a 35 K reduction in maximum channel temperature, equivalent to optimizing the device’s substrate TC from 100 to 2000 W/mK. Furthermore, properly designing the layout alignment on the 3-D anisotropic <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3 substrate could also benefit the thermal dissipation. Particularly, aligning the gate length to the direction at which <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3 has the highest and lowest in-plane TC could render <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$sim $ </tex-math></inline-formula> 60 K difference in maximum channel temperature. Overall, we analyzed the efficiency of various device-level cooling strategies for the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$beta $ </tex-math></inline-formula> -Ga2O3 device, suggesting a thermal design route by designing device architecture." @default.
• W4320015767 created "2023-02-11" @default.
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• W4320015767 date "2023-03-01" @default.
• W4320015767 modified "2023-10-01" @default.
• W4320015767 title "Device-Level Thermal Analysis for Gallium Oxide Lateral Field-Effect Transistor" @default.
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• W4320015767 doi "https://doi.org/10.1109/ted.2023.3238681" @default.
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