Dielectric Properties of Laminating Resin

Abstract

Resin has been used in industries because of different essence. The main objective of the thesis was to develop a module to study the dielectric constant change during wetting and curing and to study if the wetting of the composite results in an apparent change in capacitance due to a partial or complete displacement of all cavities air by cavity resin. Three different sensors, big finger capacitor with photolithography, spiral and finger sensor were developed inorder to perform the research. The designing of the sensor was done with Eagle and Audacity was used to collect the data. Lamination were done with all sensors and results were analysed. For big finger capacitor, lamination was done on the top of it and lamina was first constructed and then the spiral and finger sensors were placed on top.The results analysed illustrates that at lower frequencies the resin molecules oscillates more as compared to the higher frequencies and oscillation stops as the resin gets cured. The demolding time of the lamina can be calculated measuring the relative capacitance at two different frequencies. It also illustrates that if relative permittivity increases as the wetting progress and decreases as the curing progresses.