Characterization of Aerosol Jet-Printed Polyimide/h-BN Nanocomposite Thin Films for Space Applications
摘要
Low earth orbit (LEO) electronic systems are a necessity for GPS, weather prediction, and telecommunications. However, space is a harsh environment with radiation capable of causing operation issues and degradation of the entire system. Circuit board scale shielding schemes of electronics against radiation add cost, size, weight, and complexity to these systems. In this study, we propose an alternative approach which focuses on component-based selective radiation shieldingRadiation shielding also referred to as “spot shielding”. Aerosol jet printingAerosol jet printing can deposit a wide range of radiation shieldingRadiation shielding nanocompositeNanocomposites materials on microelectronic components with high precision and resolution. PolyimidePolyimide (PI) inks containing different loadings of hexagonal boron nitrideHexagonal boron nitride (h-BN) nanoparticles were formulated and printed using pneumatic atomization aerosol jet printingAerosol jet printing. The inks consisted of PI, PI-25 wt% h-BN, PI-50 wt% h-BN, PI-75 wt% h-BN, and h-BN. The printed thin filmsThin films were characterized by Fourier-transform infrared spectroscopy (FTIR) before and after exposure to gamma radiationGamma radiation at a dosage of 80 krad (Si).