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- W2294587811 abstract "We fabricated a silicon microrefrigerator on a 500- <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$mu$</tex> m-thick substrate with the standard integrated circuit (IC) fabrication process. The cooler achieves a maximum cooling of 1 <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$^circ$</tex> C below ambient at room temperature. Simulations show that the cooling power density for a <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$hbox40times hbox40 muhboxm^2$</tex> device exceeds 500 <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$hboxW/cm^2$</tex> . The unique three-dimensional (3-D) geometry, current and heat spreading, different from conventional one-dimensional (1-D) thermoelectric device, contribute to this large cooling power density. A 3-D finite element electrothermal model is used to analyze non-ideal factors inside the device and predict its limits. The simulation results show that in the ideal situation, with low contact resistance, bulk silicon with 3-D geometry could cool <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$sim hbox20 , ^circhboxC$</tex> with a cooling power density of 1000 <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$hboxW/cm^2$</tex> despite the low thermoelectric figure-of-merit (ZT) of the material. The large cooling power density is due to the geometry dependent heat and current spreading in the device. The non-uniformity of current and Joule heating inside the substrate also contributes to the maximum cooling of silicon microrefrigerator, exceeding 30% limit given in one–dimensional thermoelectric theory <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$DeltaT_max=hbox0.5hboxZT_c^2$</tex> , where <tex xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>$T_c$</tex> is the cold side temperature. These devices can be used to remove hot spots on a chip." @default.
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- W2294587811 date "2006-09-01" @default.
- W2294587811 modified "2023-10-05" @default.
- W2294587811 title "Silicon Microrefrigerator" @default.
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- W2294587811 doi "https://doi.org/10.1109/tcapt.2006.880508" @default.
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