Synthesis and thermal analysis of aluminium nitride filled epoxy composites and its effective application as thermal interface material for LED applications
Synthesis and thermal analysis of aluminium nitride filled epoxy composites and its effective application as thermal interface material for LED applications
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DOI：
10.1007/s10854-014-2238-y
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发表时间：
2014-11-01
影响因子：
2.8
通讯作者：
Lacey, D.
中科院分区：
文献类型：
--
作者：
Anithambigai, P.;Mutharasu, D.;Lacey, D.
改善任何电子器件的热传导已成为一个主要问题，其中有效的散热对于提高封装器件的性能至关重要。本文阐述了导热颗粒填充复合材料作为 LED 热界面材料的应用。目前的工作旨在以高填充陶瓷环氧树脂复合材料作为器件与金属基板之间的界面材料来降低被测器件的结温和热阻。研究了经硅烷处理的氮化铝 (AlN) 粉末作为填充材料的可行性。对于 60、50 和 40 wt% AlN 填充的环氧复合材料，通过热盘法 (ISO/DIS 22007-2.2) 获得的热导率值分别为 0.66、0.54 和 0.44 W/mK，这通过 LED 的热瞬态测量得到了很好的描述。随着填料填充量的增加，热装置的结温和总热阻显着降低。 60 wt% 的 AlN 填充 TIM 实现了最小的结至环境热阻 (RthJ-A)，其次是 50 wt% 和 40 wt% AlN 填充的 TIM，其值分别为 24.8、31.98 和 34.64 K/W。用于 LED 应用的 AlN 填充复合材料的特性在热重和热机械分析方面进行了广泛讨论。
The improvement of heat conduction in any electronic devices has become a predominant issue in which effective heat dissipation is crucial to enhance the performance of packaged devices. This paper elucidates the application of thermally conductive particles filled composites as thermal interface material for LEDs. Present work aims on reducing the junction temperature and thermal resistance of the device under test with heavily filled ceramic-epoxy composite as the interface material between the device and metal substrate. Silane treated aluminium nitride (AlN) powder was studied for its feasibility as the filler material. The thermal conductivity values obtained by hot disc method (ISO/DIS 22007-2.2) were 0.66, 0.54 and 0.44 W/mK for 60, 50 and 40 wt% AlN filled epoxy composites respectively which were described well by thermal transient measurement of LEDs. The junction temperature and total thermal resistance of the thermal set up was reduced significantly with increased filler loading. The least junction to ambient thermal resistance (RthJ-A) was achieved for 60 wt% followed by 50 and 40 wt% AlN filled TIM with the values of 24.8, 31.98 and 34.64 K/W respectively. Characteristics of the AlN filled composites for LED applications are discussed extensively in terms of thermogravimetric and thermo-mechanical analysis.