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With the vertical stacking of circuit layers, the power density of 3D-IC increases exponentially. Interlayer liquid cooling is a promising and scalable solution for high heat flux removal in 3D-IC (three-dimensional integration circuit). The flow and heat transfer performances of water through uniform and double-side heat flux 3D-IC of interlayer in-line micro-pin fins structure with heat transfer areas of 1 cm2 and Reynolds number ranging from 150 to 900 were studied numerically. 3D-IC with in-line micro-pin fins for pitches of 200 μm, diameter of 100 μm and heights of 200 μm was analyzed. Results show that interlayer liquid cooling of 3D-IC with in-line micro-pin fins has better heat exchange effect than that with rectangular micro-channels. For the Reynolds number of 770, the power reaches to 250 W, which is equivalent to 8.3 kW/cm3 volumetric heat. Compared with rectangular micro-channels, the average temperature and the maximal junction temperature of the heater surface with in-line micro-pin fins are only 46.34, 13.96 K, down by 13.26, 21.34 K, respectively. © 2017, Editorial Department of Journal of Aerospace Power. All right reserved.
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