无机导热粒子对铝基板导热性能的影响

Effect of Inorganic Thermally Conductive Particles on Thermal Conductivity of Aluminum Substrate

随着电子信息产业的高速发展,对铝基板覆铜板导热性能的要求也越来越高,提升铝基板覆铜板导热率的关键在于提高绝缘层的导热率。绝缘层以环氧树脂为基体材料,填充的无机导热粒子间通过相互接触形成三维导热网络通路,从而提升铝基覆铜板的导热性能。实验结果表明,当基体材料与主要填充的三种无机陶瓷导热粒子的比例达到EP∶BN∶AlN∶Al2O3=1.9∶1∶3∶6时,绝缘层的导热系数最终可以达到2.8 W/(m·K)。

With the rapid development of the electronic information industry,the requirements for the thermal conductivity of aluminum substrate copper-clad laminates are becoming higher and higher.The key to improving the thermal conductivity of aluminum substrate copper-clad laminates is to increase the thermal conductivity of the insulating layer.The insulating layer is made of epoxy resin as a matrix material,and the filled inorganic thermal conductive particles form a three-dimensional thermal conductive network path through mutual contact,thereby improving the thermal conductivity of the aluminum-based copper-clad board.The experimental results show that when the ratio of the matrix material to the three filled inorganic ceramic thermally conductive particles reaches EP∶BN∶AlN∶Al2O3=1.9∶1∶3∶6,the thermal conductivity of the insulating layer can finally reach 2.8 W/(m·K).