The Influence of the Manufacture Processon the Thermal Conductivity of Polymer Based ThermalInterface Materials Containing Carbon Nano Tubes

摘要

Thermal Interface Materials (TIMs) are thermally conductive materials, which are applied to reduce thermal contact resistance across the joined sur-faces. In electronics they are mostly used e.g. between package of microprocessor and heat sink or inside the package of integrated circuit between the chip and the package in order to increase the heat flow efficiency from semiconductor structure. Beside the high value of thermal conductivity, which is the main Parameter for TIMs, they can also provide mechanical connection of joined surfaces. In this article the study on TIMs made of polymer matrix filled with carbon nano tubes are presented. All specimens were made in our laboratory according to the manufacture process in which five factors were specified. To evaluate the influence of the manufacture factors the design of the experiment technique (DoE) and Analysis of Variance (ANOVA) for the results were used. Thefol-lowing factors were analyzed: content of carbon nano tubes in the composite, method of mixing components in the composite, method of carbon nano tubes dispersion, time of mixing and and type of polymer matrix. Carbon nano tubes andpolymerbase materials were commercially available. To evaluate the results the thermal conductivity of the TIMs was taken into accountt.