Lu Libin, Zhang Zhen, Guan Yingchun, Zheng Hongyu
School of Mechanical Engineering & Automation, Beihang University, Beijing 100191, China.
State Key Laboratory of Tribology and Institute of Manufacturing Engineering, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
Polymers (Basel). 2018 Aug 8;10(8):886. doi: 10.3390/polym10080886.
Optimization for heat dissipation plays a significant role in energy saving and high-efficiency utilizing of integrated electronics. In this paper, we present a study of micro structuring on polymer-based flexible substrate coupled with aluminum-alloy heat sink. The heat dissipation performance was investigated by temperature evolution of a heat sink under natural convection by infrared (IR) camera, and results showed that the heat dissipation enhancement could be up to 25%. Moreover, the heat dissipation performance of a typical heat sink in terms of light-emitting diode (LED) hip was investigated via both thermal transient measurement and the finite element analysis (FEA). The maximum LED chip temperature of the laser-textured heat sink was approximately 22.4% lower than that of the as-received heat sink. We propose that these properties accompanied with the simplicity of fabrication make laser surface texturing a promising candidate for on-chip thermal management applications in electronics.
散热优化在集成电子器件的节能和高效利用方面发挥着重要作用。在本文中,我们展示了一项关于在聚合物基柔性基板上结合铝合金散热器进行微结构化的研究。通过红外(IR)相机对散热器在自然对流下的温度变化进行研究,考察了其散热性能,结果表明散热增强可达25%。此外,通过热瞬态测量和有限元分析(FEA)研究了典型的发光二极管(LED)芯片散热器的散热性能。激光纹理化散热器的LED芯片最高温度比原样散热器低约22.4%。我们认为,这些特性以及制造的简易性使激光表面纹理化成为电子芯片热管理应用中一个有前景的候选方案。