Fabrication and characterization of aluminum nitride polymer matrix composites with high thermal conductivity and low dielectric constant for electronic packaging

摘要

Polymethyl methacrylate (PMMA) composites filled with Aluminum Nitride (A1N) were prepared by powder processing technique. The microstructures of the composites were investigated by scanning electron microscopy techniques. The effect of A1N filler content (0.1-0.7 volume fraction (vf)) on the thermal conductivity, relative permittivity, and dielectric loss were investigated. As the vf of A1N filler increased, the thermal conductivity of the specimens increased. The thermal conductivity and relative permittivity of AlN/PMMA composites with 0.7 vf A1N filler were improved to 1.87 W/(m K) and 4.4 (at 1 MHz), respectively. The experimental thermal conductivity and relative permittivity were compared with that from simulation model.