Design and control of the dielectric properties of metal-polymer based artificial nanodielectrics for embedded capacitor applications
Reddy Ettedi, Narasimha 1987-
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Extensive research is being done today on embedded capacitors because of their promising applications in energy storage solutions, microelectronics products, and packaging. However, selection of materials and process issues have been the stumbling blocks for commercialization of the embedded capacitor technology for electronic packages. Polymer composite materials based on conductive nanoparticles provide a potential solution to embedded capacitors with the advantage of the polymers being compatible with standard printed circuit boards (PCB). Polymer nanocomposites with embedded nanoparticles have recently been investigated as potential materials with the capability of obtaining very high dielectric constant materials. This thesis work involves loading of Ag nanoparticles in a Polyvinylpyrrolidone (PVP) matrix and controlling the dielectric performance of this material system by employing methods such as controlled dispersion, centrifugation of agglomerated nanoparticles, multi-layered dielectric films and overall optimization of the material coating process. The dielectric behaviors of the nanocomposites were studied systematically over a range of frequencies to determine the dependence of dielectric constant, dielectric loss tangent and dielectric strength on these parameters. Percolation theory was used to analytically calculate K value of the composites. Finite Element Method (FEM)-based COMSOL Multiphysics simulations demonstrated an increase in the K value of the composite.