(1) Using high intrinsic thermal conductive filler: the thermally con-ductive composites filled inorganic fillers such as boron nitride(BN) [3], aluminum nitride (AlN) [4] and silicon carbide (SiC)[5] provide higher thermal conductivity than the composites∗Corresponding author. Tel.: +886 227333141.E-mail address: hchiu@mail.ntust.edu.tw (H.T. Chiu).filled inorganic fillers such as aluminum oxide (Al2O3) [2], sili-con dioxide (SiO2) [6] and zinc oxide (ZnO) [7] because of theirhigher intrinsic thermal conductivity.(2) Using of hybrid fillers: the synergistic effect of different shapefillers could provide a higher maximum packing fraction thanthe composites filled single filler, thus resulted in more efficientconductive pathways in the composites [8–11].(3) The optimized processing conditions: the effect of mixing speed,mixing time and mixing temperature impede the dispersion offiller and increase the agglomeration of filler particles, whichresult in the decrease in the thermal conductivity of the com-posites [12]. Moreover, the specimen fabricated by a methodinvolving the use of solvent is considered to cause air bubblesto be trapped in the composites, thus decreased the thermalconductivity of the composites [13].The alignment of fillers: some kind of fillers, such as boronnitride, possessed high thermal conductivity in the basal plane.Applying a magnetic or electric field would cause the fillers ori-ent in the same direction, and result in the enhancement of