Development of High Thermal Conductivity Thermal Interface Materials (Tims) with the Novel Percolation Nano-Structure and Application to Igbt Thermal Management(1/3)

This project aims to use the novel nano-textured percolation structures with the application to thermal interface material (TIMs) utilized in the converter of the renewable energy sources of wind and solar cells. Scheme will be the combination of nano-textured percolation structures with the ball milling graphene powders. Applied the proposed TIMs to the interface of heatsink and heat generation source (primarily the insulated gate bipolar tranistor, IGBT) for the temperature measurement for the efficient thermal management. Respective aims and project goal can be summarized as follows:Year 1: Research and development of the novel nano-textured percolation structures of lamellar configuration with high thermal conductivity. The applications will be the TIMs for the15kW IGBT used for renewable wind turbine. In addition to collecting the relevant literature relevant to low-power IGBT failure modes and Direct bonded copper (DBC) failure, we carry out mechanical simulations using a finite element method (FEM) simulator (COMSOL) for a simplified 3D power assembly to calculate the different temperatures fields due to natural and forced convection conditions. The observation of power failure modes on the cross-sectional view. aimed primarily at low-power IGBT chips and solders, aluminium wiring micro-structure analysis and its failure, and substitute thermal interface grease making its high power IGBT extend service life. The specific targets are the followings：Thermal conductivity In-plane/Through-plane: 25-30 W/mK/1-5 W/mK, as favorably compared with the latest leading indicators of In-plane/Through-plane thermal conductivity: 14 W/mK/2 W/mK [1].Year 2: Development of the novel nano-textured percolation structures of silver nanowires networks (AgNWs) with much improved high thermal conductivity. The applications will be the TIMs for the100kW IGBT used for renewable solar cells. Moreover the second yeart also focused on high power IGBT module subjected to sinusoidal loading at nominal power level. The specific targets are the followings：Thermal conductivity In-plane/Through-plane: 30-40W/mK/3-7W/mK.Year 3: Research and development of the novel vertical double percolation structures with high and tunable thermal conductivity. The applications will be the TIMs for the 250kW IGBT module used for serial-connected renewable energy sources of wind turbine and solar cells. The third year is the direct application with TIMs that are ubiquitously used for enhancing heat transfer in electronics packages and crucial importance in improving, particularly in high density electronics at regions of exceedingly high temperatures. In this work, we prepared graphene powder was ground to a nanometer scale by a ball mill. silver nanoparticles (SNPs) and single wall carbon nanotubes (SWCNTs) based nanocomposites with graphite graphene nanoplatelets (GNPs) by using screen printing process to confirm the conformal uniformity of SNPs and SWCNTs spreading on the GNP and measured temperature between IGBT and aluminum heat sink.The specific target is the followings： The specific targets are the followings：Thermal conductivity In-plane/Through-plane: 40-50W/mK/6-10W/mK.